CN116550350A - Environment-friendly formaldehyde purifying agent and preparation method and application thereof - Google Patents
Environment-friendly formaldehyde purifying agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN116550350A CN116550350A CN202310537275.8A CN202310537275A CN116550350A CN 116550350 A CN116550350 A CN 116550350A CN 202310537275 A CN202310537275 A CN 202310537275A CN 116550350 A CN116550350 A CN 116550350A
- Authority
- CN
- China
- Prior art keywords
- source
- environment
- purifying agent
- drying
- formaldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 239000012629 purifying agent Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 239000004113 Sepiolite Substances 0.000 claims abstract description 52
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 52
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 52
- 238000001035 drying Methods 0.000 claims abstract description 47
- 239000000243 solution Substances 0.000 claims abstract description 47
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 44
- 238000001914 filtration Methods 0.000 claims abstract description 43
- 238000005406 washing Methods 0.000 claims abstract description 43
- 239000011259 mixed solution Substances 0.000 claims abstract description 42
- 239000002253 acid Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 239000008367 deionised water Substances 0.000 claims abstract description 28
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 12
- 239000010941 cobalt Substances 0.000 claims abstract description 12
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 9
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 9
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052709 silver Inorganic materials 0.000 claims abstract description 9
- 239000004332 silver Substances 0.000 claims abstract description 9
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 9
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 8
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003513 alkali Substances 0.000 claims abstract description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 5
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 5
- 239000011734 sodium Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 30
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical group [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 24
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 12
- 229910000397 disodium phosphate Inorganic materials 0.000 claims description 12
- 235000019800 disodium phosphate Nutrition 0.000 claims description 12
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 12
- 229910002651 NO3 Inorganic materials 0.000 claims description 10
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 10
- AAQNGTNRWPXMPB-UHFFFAOYSA-N dipotassium;dioxido(dioxo)tungsten Chemical compound [K+].[K+].[O-][W]([O-])(=O)=O AAQNGTNRWPXMPB-UHFFFAOYSA-N 0.000 claims description 10
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 9
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 9
- ATINCSYRHURBSP-UHFFFAOYSA-K neodymium(iii) chloride Chemical compound Cl[Nd](Cl)Cl ATINCSYRHURBSP-UHFFFAOYSA-K 0.000 claims description 9
- 229910001631 strontium chloride Inorganic materials 0.000 claims description 9
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 claims description 9
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- PVFSDGKDKFSOTB-UHFFFAOYSA-K iron(3+);triacetate Chemical compound [Fe+3].CC([O-])=O.CC([O-])=O.CC([O-])=O PVFSDGKDKFSOTB-UHFFFAOYSA-K 0.000 claims description 4
- BYDYILQCRDXHLB-UHFFFAOYSA-N 3,5-dimethylpyridine-2-carbaldehyde Chemical compound CC1=CN=C(C=O)C(C)=C1 BYDYILQCRDXHLB-UHFFFAOYSA-N 0.000 claims description 3
- MCDLETWIOVSGJT-UHFFFAOYSA-N acetic acid;iron Chemical compound [Fe].CC(O)=O.CC(O)=O MCDLETWIOVSGJT-UHFFFAOYSA-N 0.000 claims description 3
- 229940011182 cobalt acetate Drugs 0.000 claims description 3
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 3
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 3
- 229960002089 ferrous chloride Drugs 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- CFYGEIAZMVFFDE-UHFFFAOYSA-N neodymium(3+);trinitrate Chemical compound [Nd+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CFYGEIAZMVFFDE-UHFFFAOYSA-N 0.000 claims description 3
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical group [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 3
- RXSHXLOMRZJCLB-UHFFFAOYSA-L strontium;diacetate Chemical compound [Sr+2].CC([O-])=O.CC([O-])=O RXSHXLOMRZJCLB-UHFFFAOYSA-L 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims 4
- 238000000746 purification Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 17
- 239000003054 catalyst Substances 0.000 description 12
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 9
- 238000006731 degradation reaction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- VGBWDOLBWVJTRZ-UHFFFAOYSA-K cerium(3+);triacetate Chemical compound [Ce+3].CC([O-])=O.CC([O-])=O.CC([O-])=O VGBWDOLBWVJTRZ-UHFFFAOYSA-K 0.000 description 7
- 239000012855 volatile organic compound Substances 0.000 description 7
- 238000011068 loading method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- 239000002808 molecular sieve Substances 0.000 description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- SSWAPIFTNSBXIS-UHFFFAOYSA-N dioxido(dioxo)tungsten;iron(2+) Chemical compound [Fe+2].[O-][W]([O-])(=O)=O SSWAPIFTNSBXIS-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 241000735552 Erythroxylum Species 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 235000008957 cocaer Nutrition 0.000 description 2
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002070 nanowire Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 description 2
- 229940019931 silver phosphate Drugs 0.000 description 2
- 229910000161 silver phosphate Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNVJTZOFSHSLTO-UHFFFAOYSA-N Fenthion Chemical compound COP(=S)(OC)OC1=CC=C(SC)C(C)=C1 PNVJTZOFSHSLTO-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- -1 alum Chemical compound 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005447 environmental material Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003905 indoor air pollution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011949 solid catalyst Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/95—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
The invention belongs to the technical field of formaldehyde purification, and particularly relates to an environment-friendly formaldehyde purifying agent, and a preparation method and application thereof. The preparation method comprises the following steps: (1) Adding sepiolite into an acid solution, stirring, filtering, washing and drying to obtain acid-treated sepiolite; (2) Ultrasonically dispersing the sepiolite, the silver source, the iron source and the neodymium source which are obtained in the step (1) into deionized water to obtain a mixed solution, slowly dripping the sodium hydrophosphate solution into the mixed solution, and stirring; then dropwise adding an alkali solution to adjust the pH value of the mixed solution; then transferring the mixture into a hydrothermal reaction kettle for hydrothermal reaction, filtering, washing and drying to obtain a product A; (3) Ultrasonically dispersing the product A, a ferrous source, a strontium source, a cerium source, a cobalt source and tungstate obtained in the step (2) into deionized water; and carrying out hydrothermal reaction, filtering, washing and drying to obtain the formaldehyde purifying agent. The formaldehyde purifying agent prepared by the invention has excellent formaldehyde purifying capability and has excellent application prospect.
Description
Technical Field
The invention belongs to the technical field of formaldehyde purification. More particularly, relates to an environment-friendly formaldehyde purifying agent and a preparation method and application thereof.
Background
With the continuous development of the economy in China, the living standard of people is greatly improved, the pursuit of living environment quality and grade is also continuously improved, the indoor decoration of houses becomes the trend of the current society, the use of various decorations and decoration materials containing more Volatile Organic Compounds (VOC) and furniture is increasingly increased, and the indoor air pollution problem is increasingly serious. Formaldehyde is one of the most common and most serious air pollutants that is harmful to humans and has been classified as a carcinogenic and teratogenic substance by the world health organization. Therefore, the problem of indoor formaldehyde pollution is becoming a hot spot in the current environmental material field research, and is also an important research subject about national folk life and sustainable development. Among the technologies for purifying indoor formaldehyde, the semiconductor photocatalysis technology is considered by researchers to be an air purification green technology with good development potential and application prospect because formaldehyde molecules can be completely mineralized into carbon dioxide and water molecules harmless to human bodies at room temperature, and the degradation capability is strong, stable and sustainable.
CN111468172B discloses a metal oxide-silver dual-function catalyst for purifying formaldehyde waste gas and a preparation method thereof. The catalyst consists of a component A and a component B, wherein the component A and the component B are both supported catalysts, the active component of the component A is Fe, mn, co, ce active metal oxide, the active component of the component B is Ag, and the carrier is SBA-15, MCM-41, KIT-6 and other ordered mesoporous silicon materials. The component A and the component B are arranged in a layered packing or mechanical mixing mode. The loading of the active metal oxide in the component A is 3-10%. The Ag loading in the component B is 6-10%. The catalyst material used in the invention has wide sources, low cost and good catalyst repeatability. The method can completely catalyze and oxidize at a lower temperature to remove formaldehyde, has low application cost and good industrial application potential.
CN115672268A discloses a formaldehyde adsorption degradation agent and a preparation method thereof, wherein modified carbon fiber, tourmaline powder, vermiculite, aminosilane and mixed ester are taken as raw materials, and are obtained by blending and crushing in sequence; the preparation method of the modified carbon fiber comprises the steps of carrying out combined treatment on the carbon fiber by ozone and an electric field, and modifying raw materials such as sulfonic acid, methoxysilane and the like. The formaldehyde adsorption and degradation agent prepared by the specific method can generate a large amount of negative ions and has strong purification capability on formaldehyde.
CN113144894B discloses a functional material for visually degrading formaldehyde and VOCs at normal temperature and normal pressure, which comprises a loading agent, an oxidant, a catalyst, an enhancer and a ligand. Through the synergistic strengthening effect of the loading agent, the oxidant, the catalyst, the reinforcing agent and the ligand, the reaction efficiency is improved, so that the material has excellent formaldehyde and VOCs degradation effect at normal temperature and normal pressure, and the structure and the color of the material change before and after the material reacts with formaldehyde and VOCs, and the reaction speed and the reaction degree can be directly observed and indicated by naked eyes. The material prepared by the invention can degrade formaldehyde and various VOCs. Due to the synergistic strengthening effect, various components are uniformly distributed and combined and fastened, the material is water-resistant and moisture-resistant, can be made into solid or liquid, and essentially solves the problems of performance attenuation, structural damage and the like of the solid catalyst after absorbing water. The invention is used in the fields of environmental protection and health, and is particularly important for treating polluted gas in space and industrial VOCs.
CN113042065B is a CoCa-OMS-2 nanowire catalyst for removing formaldehyde and a preparation method thereof, comprising CoCa and OMS, wherein CoCa is a manganese oxide octahedral molecular sieve doped with cobalt and calcium, and OMS is a manganese oxide octahedral molecular sieve; the mass ratio of cobalt element to manganese element is 0.5-8, and the addition mass ratio of calcium is 2-10% of manganese element. OMS-2 refers to a manganese oxide octahedral molecular sieve, while CoCa-OMS-2 refers to a manganese oxide octahedral molecular sieve doped with cobalt and calcium. Also included are cerium, alum, copper, magnesium, sodium, potassium, all in oxide form, which are doped in, typically in proportions of 0.1-5%. The CoCa-OMS-2 nanowire catalyst for removing formaldehyde and the preparation method thereof can effectively catalyze and oxidize formaldehyde, and in the normal-temperature oxidative degradation process of formaldehyde, noble metal, manganese oxide and other catalysts can oxidize formaldehyde into carbon dioxide in the use process, so that the problem that formaldehyde can be oxidized into formic acid is avoided.
However, the formaldehyde purifying agent has a relatively long purifying time or limited purifying capacity, and the utilization rate of the purifying agent is not high.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings in the prior art and provide an environment-friendly formaldehyde purifying agent, and a preparation method and application thereof. The preparation method comprises the following steps: (1) Adding sepiolite into an acid solution, stirring, filtering, washing and drying to obtain acid-treated sepiolite; (2) Ultrasonically dispersing the sepiolite, the silver source, the iron source and the neodymium source which are obtained in the step (1) into deionized water to obtain a mixed solution, slowly dripping the sodium hydrophosphate solution into the mixed solution, and stirring; then dropwise adding an alkali solution to adjust the pH value of the mixed solution; then transferring the mixture into a hydrothermal reaction kettle for hydrothermal reaction, filtering, washing and drying to obtain a product A; (3) Ultrasonically dispersing the product A, a ferrous source, a strontium source, a cerium source, a cobalt source and tungstate obtained in the step (2) into deionized water; and carrying out hydrothermal reaction, filtering, washing and drying to obtain the formaldehyde purifying agent. The formaldehyde purifying agent prepared by the invention has excellent formaldehyde purifying capability and has excellent application prospect.
The invention aims to provide a preparation method of an environment-friendly formaldehyde purifying agent.
The invention further aims to provide an environment-friendly formaldehyde purifying agent.
The invention also aims to provide an application of the environment-friendly formaldehyde purifying agent.
The above object of the present invention is achieved by the following technical scheme:
the preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding sepiolite into the acid solution, stirring for 8-16 h, filtering, washing and drying to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing the sepiolite, the silver source, the iron source and the neodymium source which are obtained in the step (1) into deionized water to obtain a mixed solution, slowly dripping the sodium hydrophosphate solution into the mixed solution, and stirring for 20-40 min; then dropwise adding alkali solution to adjust the pH value of the mixed solution to 9-11; then transferring the mixture into a hydrothermal reaction kettle for hydrothermal reaction, filtering, washing and drying to obtain a product A;
(3) Ultrasonically dispersing the product A, a ferrous source, a strontium source, a cerium source, a cobalt source and tungstate obtained in the step (2) into deionized water; then carrying out hydrothermal reaction for 16-26 h at 180-220 ℃, filtering, washing, and drying for 10-18 h at 80-120 ℃ to obtain the formaldehyde purifying agent.
Preferably, in the step (1), the acid is hydrochloric acid, and the concentration of the hydrochloric acid is 2-4 mol/L.
Preferably, in step (1), the ratio of sepiolite to acid solution is 1g: 20-30 mL; the drying is carried out for 6-10 hours at 100-140 ℃;
preferably, in step (2), the silver source is silver nitrate; the iron source is at least one of ferric nitrate, ferric chloride and ferric acetate; the neodymium source is at least one of neodymium nitrate, neodymium chloride and neodymium acetate.
Preferably, in the step (2), the ratio of the acid-treated sepiolite, silver source, iron source, neodymium source and sodium hydrogen phosphate obtained in the step (1) is: 1g:1.5mmol:0.01 to 0.03mmol: 0.02-0.04 mmol:0.5mmol; the alkali liquor is sodium hydroxide solution with the concentration of 0.5-1.5 mol/L.
Preferably, in the step (2), the hydrothermal reaction is carried out at 120-140 ℃ for 8-16 h, and the drying is carried out at 80-120 ℃ for 10-18 h.
Preferably, in step (3), the ferrous source is at least one of ferrous nitrate, ferrous chloride and ferrous acetate; the strontium source is at least one of strontium nitrate, strontium chloride and strontium acetate; the cerium source is at least one of cerium nitrate, cerium chloride and cerium acetate; the cobalt source is at least one of cobalt nitrate, cobalt chloride and cobalt acetate; the tungstate is sodium tungstate, potassium tungstate or ammonium tungstate.
Preferably, in step (3), the ratio of product a, ferrous source, strontium source, cerium source, cobalt source and tungstate obtained in step (2) is 1g: (0.5-x-y-z) mmol: x mmol; y mmol: z mmol:0.5mmol; x is 0.01-0.03; y is 0.005-0.015; z is 0.015 to 0.025.
The environment-friendly formaldehyde purifying agent prepared based on the preparation method of the environment-friendly formaldehyde purifying agent.
Based on the application of the environment-friendly formaldehyde purifying agent, the environment-friendly formaldehyde purifying agent is used for purifying formaldehyde.
The invention has the following beneficial effects:
(1) The specific surface area of the sepiolite is improved through the sepiolite treatment, and then the purification degradation capability of formaldehyde is improved through the co-doping of silver phosphate with iron and neodymium and loading on the sepiolite;
(2) The strontium, cerium and cobalt co-doped iron tungstate is used for improving the photocatalytic performance of the iron tungstate by utilizing the interaction between the components, and the doped silver phosphate and the doped iron tungstate have synergistic effect, so that the purifying capacity of formaldehyde is further degraded.
(3) The preparation process is simple, the sources of raw materials are rich, and the preparation method has excellent application prospect.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are not intended to limit the invention in any way. Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.
Reagents and materials used in the following examples are commercially available unless otherwise specified.
Example 1
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.01mmol of cerium acetate, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Example 2
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 30mL of 2mol/L hydrochloric acid solution, stirring for 16h, filtering, washing, and drying at 140 ℃ for 6h to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.03mmol of ferric chloride and 0.02mmol of neodymium acetate into 50mL of deionized water to obtain a mixed solution, slowly dropwise adding 5mL of 0.1mol/L sodium hydrogen phosphate solution into the mixed solution, and stirring for 40min; then 1.5mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 11; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 140 ℃ for 8 hours, filtering, washing and drying at 120 ℃ for 10 hours to obtain a product A.
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.44mmol of ferrous chloride, 0.03mmol of strontium acetate, 0.005mmol of cerium nitrate, 0.025mmol of cobalt chloride and 0.5mmol of ammonium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction at 220 ℃ for 16 hours, filtering, washing, and drying at 120 ℃ for 10 hours to obtain the formaldehyde purifying agent.
Example 3
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 20mL of 4mol/L hydrochloric acid solution, stirring for 8h, filtering, washing, and drying at 100 ℃ for 10h to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.01mmol of ferric acetate and 0.04mmol of neodymium nitrate into 50mL of deionized water to obtain a mixed solution, slowly dropwise adding 5mL of 0.1mol/L sodium hydrogen phosphate solution into the mixed solution, and stirring for 20min; then dropwise adding 0.5mol/L sodium hydroxide solution to adjust the pH value of the mixed solution to 9; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 120 ℃ for 16 hours, filtering, washing and drying at 80 ℃ for 18 hours to obtain a product A.
(3) 1g of the product A obtained in the step (2), 0.46mmol of ferrous acetate, 0.01mmol of strontium nitrate, 0.015mmol of cerium chloride, 0.015mmol of cobalt acetate and 0.5mmol of sodium tungstate are ultrasonically dispersed into 50mL of deionized water; then carrying out hydrothermal reaction at 180 ℃ for 26 hours, filtering, washing, and drying at 80 ℃ for 18 hours to obtain the formaldehyde purifying agent.
Comparative example 1
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate and 0.05mmol of ferric nitrate into 50mL of deionized water to obtain a mixed solution, slowly dropwise adding 5mL of 0.1mol/L sodium hydrogen phosphate solution into the mixed solution, and stirring for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.01mmol of cerium acetate, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 2
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate and 0.05mmol of neodymium chloride into 50mL of deionized water to obtain a mixed solution, slowly dropwise adding 5mL of 0.1mol/L sodium hydrogen phosphate solution into the mixed solution, and stirring for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.01mmol of cerium acetate, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 3
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.03mmol of strontium chloride, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 4
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) Ultrasonically dispersing 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.03mmol of cerium acetate, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 5
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.03mmol of cerium acetate and 0.5mmol of potassium tungstate are ultrasonically dispersed in 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 5
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain a product A;
(3) 1g of the product A obtained in the step (2), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.03mmol of cobalt nitrate and 0.5mmol of potassium tungstate are ultrasonically dispersed in 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Comparative example 7
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) 1g of the acid-treated sepiolite obtained in the step (1), 1.5mmol of silver nitrate, 0.02mmol of ferric nitrate and 0.03mmol of neodymium chloride are ultrasonically dispersed into 50mL of deionized water to obtain a mixed solution, and then 5mL of 0.1mol/L sodium hydrogen phosphate solution is slowly dripped into the mixed solution, and stirring is carried out for 30min; then 1mol/L sodium hydroxide solution is dripped to adjust the pH value of the mixed solution to 10; then transferring the mixture into a hydrothermal reaction kettle, carrying out hydrothermal reaction at 130 ℃ for 12 hours, filtering, washing, and drying at 100 ℃ for 14 hours to obtain the environment-friendly formaldehyde purifying agent.
Comparative example 8
The preparation method of the environment-friendly formaldehyde purifying agent comprises the following steps:
(1) Adding 1g of sepiolite into 25mL of 3mol/L hydrochloric acid solution, stirring for 12h, filtering, washing, and drying at 120 ℃ for 8h to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing 1g of the acid-treated sepiolite obtained in the step (1), 0.45mmol of ferrous nitrate, 0.02mmol of strontium chloride, 0.01mmol of cerium acetate, 0.02mmol of cobalt nitrate and 0.5mmol of potassium tungstate into 50mL of deionized water; then carrying out hydrothermal reaction for 20h at 200 ℃, filtering, washing, and drying for 14h at 100 ℃ to obtain the formaldehyde purifying agent.
Examples 1-3 and comparative examples 1-8 were used in photocatalytic formaldehyde degradation experiments, the specific experimental procedure being as follows:
under the irradiation of room temperature visible light, the photocatalytic degradation performance of formaldehyde is evaluated by adopting a continuous flow reactor. Firstly, 0.5g of environment-friendly formaldehyde purification catalyst is weighed and coated in the middle of a square plate with the length of 5cm multiplied by 5cm, and the catalyst is placed in the center of a reactor. Adjusting the ratio of formaldehyde gas to air flow to obtain formaldehyde gas with a certain concentration, and controlling the air flow speed to be 0.5L/min. A 500W xenon lamp was placed vertically on the reactor. Prior to irradiation, the sample-coated square plate was kept in the dark for 60min to reach adsorption-desorption equilibrium. After the adsorption is completed, the light source is turned on. The residual formaldehyde concentration was monitored by formaldehyde gas analyzer for 20min and 40 min. The degradation efficiency of the photocatalyst was calculated according to formula (1):
D＝(C 0 -C t )×100％/C 0 the method comprises the steps of carrying out a first treatment on the surface of the Wherein D is photocatalytic degradation efficiency,%; c (C) 0 The initial mass concentration of formaldehyde is mol/L; c (C) t The mass concentration of formaldehyde after t min of illumination is mol/L.
The specific results are shown in Table 1:
TABLE 1
| Formaldehyde degradation at 20min (%) | Formaldehyde degradation at 40min (%) | |
| Example 1 | 86.5 | 98.6 |
| Example 2 | 85.1 | 97.3 |
| Example 3 | 85.8 | 97.6 |
| Comparative example 1 | 82.4 | 94.6 |
| Comparative example 2 | 83.1 | 95.4 |
| Comparative example 3 | 82.9 | 95.2 |
| Comparative example 4 | 83.2 | 95.6 |
| Comparative example 5 | 82.5 | 94.9 |
| Comparative example 6 | 83.6 | 95.9 |
| Comparative example 7 | 63.4 | 74.1 |
| Comparative example 8 | 62.5 | 73.2 |
As can be seen from Table 1, the environment-friendly formaldehyde purifying agent prepared by the method has excellent purifying capacity on formaldehyde by utilizing the interaction among components, so that the environment-friendly formaldehyde purifying agent prepared by the method has excellent application prospect.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the environment-friendly formaldehyde purifying agent is characterized by comprising the following steps of: the preparation method comprises the following steps:
(1) Adding sepiolite into the acid solution, stirring for 8-16 h, filtering, washing and drying to obtain acid-treated sepiolite;
(2) Ultrasonically dispersing the sepiolite, the silver source, the iron source and the neodymium source which are obtained in the step (1) into deionized water to obtain a mixed solution, slowly dripping the sodium hydrophosphate solution into the mixed solution, and stirring for 20-40 min; then dropwise adding alkali solution to adjust the pH value of the mixed solution to 9-11; then transferring the mixture into a hydrothermal reaction kettle for hydrothermal reaction, filtering, washing and drying to obtain a product A;
(3) Ultrasonically dispersing the product A, a ferrous source, a strontium source, a cerium source, a cobalt source and tungstate obtained in the step (2) into deionized water; then carrying out hydrothermal reaction for 16-26 h at 180-220 ℃, filtering, washing, and drying for 10-18 h at 80-120 ℃ to obtain the formaldehyde purifying agent.
2. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in the step (1), the acid is hydrochloric acid, and the concentration of the hydrochloric acid is 2-4 mol/L.
3. The method for preparing the environment-friendly formaldehyde scavenger according to claim 1 or 2, which is characterized in that: in step (1), the sepiolite to acid solution ratio is 1g: 20-30 mL; the drying is carried out for 6-10 hours at 100-140 ℃.
4. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in step (2), the silver source is silver nitrate; the iron source is at least one of ferric nitrate, ferric chloride and ferric acetate; the neodymium source is at least one of neodymium nitrate, neodymium chloride and neodymium acetate.
5. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in the step (2), the ratio of the acid-treated sepiolite, silver source, iron source, neodymium source and sodium hydrogen phosphate obtained in the step (1) is as follows: 1g:1.5mmol:0.01 to 0.03mmol: 0.02-0.04 mmol:0.5mmol; the alkali liquor is sodium hydroxide solution with the concentration of 0.5-1.5 mol/L.
6. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in the step (2), the hydrothermal reaction is carried out at 120-140 ℃ for 8-16 h, and the drying is carried out at 80-120 ℃ for 10-18 h.
7. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in the step (3), the iron source is at least one of ferric nitrate, ferric chloride and ferric acetate; the ferrous source is at least one of ferrous nitrate, ferrous chloride and ferrous acetate; the strontium source is at least one of strontium nitrate, strontium chloride and strontium acetate; the cobalt source is at least one of cobalt nitrate, cobalt chloride and cobalt acetate; the tungstate is sodium tungstate, potassium tungstate or ammonium tungstate.
8. The method for preparing the environment-friendly formaldehyde purifying agent according to claim 1, which is characterized in that: in step (3), the ratio of product A, ferrous source, strontium source, cerium source, cobalt source and tungstate obtained in step (2) is 1g: (0.5-x-y-z) mmol: an x mmol; ymmol: zmmol:0.5mmol; x is 0.01-0.03; y is 0.005-0.015; z is 0.015 to 0.025.
9. An environment-friendly formaldehyde scavenger prepared by the preparation method of the environment-friendly formaldehyde scavenger according to any one of claims 1-8.
10. The use of the environment-friendly formaldehyde scavenger according to claim 9, characterized in that: the environment-friendly formaldehyde purifying agent is used for purifying formaldehyde.
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