CN106807451B - A kind of flexibility platinum formaldehyde room temperature oxidation catalyst and preparation method thereof - Google Patents
A kind of flexibility platinum formaldehyde room temperature oxidation catalyst and preparation method thereof Download PDFInfo
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- CN106807451B CN106807451B CN201710036633.1A CN201710036633A CN106807451B CN 106807451 B CN106807451 B CN 106807451B CN 201710036633 A CN201710036633 A CN 201710036633A CN 106807451 B CN106807451 B CN 106807451B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 63
- 230000003647 oxidation Effects 0.000 title claims abstract description 36
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- ZFBYFCMUNLWXTK-UHFFFAOYSA-N formaldehyde;platinum Chemical compound [Pt].O=C ZFBYFCMUNLWXTK-UHFFFAOYSA-N 0.000 title claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 95
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229920000742 Cotton Polymers 0.000 claims abstract description 88
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 229910021650 platinized titanium dioxide Inorganic materials 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 4
- 238000005238 degreasing Methods 0.000 claims abstract description 3
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 72
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 35
- 239000002253 acid Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 24
- 239000008139 complexing agent Substances 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 15
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000012670 alkaline solution Substances 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- -1 Titanium alkoxides Chemical class 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- 239000001509 sodium citrate Substances 0.000 claims description 7
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 7
- 229940038773 trisodium citrate Drugs 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000908 ammonium hydroxide Substances 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000002082 metal nanoparticle Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims 1
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims 1
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 11
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 3
- 239000010970 precious metal Substances 0.000 abstract description 3
- 235000019256 formaldehyde Nutrition 0.000 description 28
- 229910052697 platinum Inorganic materials 0.000 description 22
- 239000002105 nanoparticle Substances 0.000 description 9
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 229910000510 noble metal Inorganic materials 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 239000002585 base Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 230000010718 Oxidation Activity Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- LLQPHQFNMLZJMP-UHFFFAOYSA-N Fentrazamide Chemical compound N1=NN(C=2C(=CC=CC=2)Cl)C(=O)N1C(=O)N(CC)C1CCCCC1 LLQPHQFNMLZJMP-UHFFFAOYSA-N 0.000 description 1
- 241000241602 Gossypianthus Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- LLJZKKVYXXDWTB-UHFFFAOYSA-N acetic acid;sodium Chemical compound [Na].[Na].CC(O)=O LLJZKKVYXXDWTB-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
-
- 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
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The present invention relates to a kind of flexibility Pt formaldehyde room temperature oxidation catalysts and preparation method thereof, and in particular to a kind of Pt/TiO2Flexible compound formaldehyde room temperature oxidation catalyst of/cotton fiber and preparation method thereof.The catalyst includes degreasing cotton fiber carrier, nano-TiO2Surface covering and it is dispersed in TiO2The Pt active component of coating surface, wherein Pt active component exists in the form of zeroth order, particle size range 1-10 nm, and load capacity is 0.05-2 wt%.Pt/TiO provided by the invention2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst has the characteristics that classify mesoporous-macroporous structure, lightweight and flexibility, Pt and TiO2It is firmly combined between coating and carrier cotton fiber, active component simple substance Pt is in TiO2Coating surface good dispersion, partial size are small, room temperature can efficient catalytic decomposing formaldehyde, precious metals pt dosage is small, vapour lock is small, is suitable for using in all kinds of air purifiers.
Description
Technical field
The present invention relates to a kind of Pt/TiO2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst, belongs to indoor air purification
Field.
Background technique
Formaldehyde is one of most important pollutant in room air, has biggish toxicity.Currently, it is dirty to eliminate indoor formaldehyde
Dye has become the hot research problem of field of environmental improvement.In existing methanal removing method, room temperature catalytic oxidation method is opposite
In other way (absorption method, absorption process, anion oxidizing process, catalytic ozonation method, biofiltration/plant purification method, low temperature
Plasma method and photocatalytic oxidation etc.) there is unique advantage, it can be carried out at normal temperatures and pressures, methanal removing efficiency
The advantages that height, equipment is simple, and the service life is long is the methanal removing technology of most application potential.In recent years, technology air indoors
Purification applications research constantly makes progress and breaks through, as Chinese invention patent CN200410047973.7,
CN200410102837.3、CN200910215887.5、CN200910098634.4、CN200910047376.7、
CN200610011663.9, CN200710121423.9, CN201210389227.0 and CN201410015867.4, in patent
Metal oxide carrier is first prepared in CN200410047973.7, evaporation is made after being then immersed in the solution of noble metal component,
But the state of the catalyst effective component noble metal is not indicated, and activity is relatively low.It is well known that obtain high and stable formaldehyde
Catalytic oxidation activity, catalyst must have good dispersibility, lesser partial size and valence state appropriate.And most of patent is such as
CN200410102837.3、CN200910215887.5、CN200910098634.4、CN200910047376.7、
Gold Samples category prepared by method for preparing catalyst described in CN200610011663.9 and CN200710121423.9
May exist in the form of the oxide, and bad dispersibility, this will influence whether active raising；And if to obtain the expensive of 0 valence
Metal, it is also necessary to the H of high temperature2Reduction process, makes process complications, and cost also correspondinglys increase.Patent CN201210389227.0
A kind of preparation method of formaldehyde room temperature oxidation catalyst is reported, this method is using porous inorganic oxide as carrier, with boron hydrogen
Change is received as reducing agent, and soluble metal hydroxide is additive, passes through dipping-room temperature reduction-sedimentation and noble metal precursor
Precursor reactant is made.The method achieve the room temperature catalytic oxidations of catalyst, also show higher catalytic activity.But it is disclosed above
The catalyst prepared in patent is mostly with common porous inorganic matter nano particle (such as titanium dioxide from the point of view of practical
Titanium, aluminium oxide, molecular sieve, cerium oxide and silica etc.) it is made for carrier, these catalyst are such as applied to filled-type cleaning equipment
In need tabletting or be further supported on other bulk type carriers to use, this can make process complications, and exist
Catalytic activity declines, vapour lock is big and the caducous problem of catalyst.To overcome drawbacks described above, patent CN201410015867.4 with
The TiO of method of electrostatic spinning preparation2For carrier, carried noble metal/TiO is prepared for dipping~room temperature reduction~sedimentation2It is compound
Catalyst, freshly prepd catalyst without loading again, and catalytic activity with higher and lesser air drag, but this is urged
Agent is due to being with inorganic TiO2Nanofiber substrate, therefore there is fragility, and fragility increases with the reduction of fibre diameter
Greatly, will cause in this way can constantly be broken off in use, and original fibre structure is gradually corrupted such that vapour lock also gradually
Increase.It and is to remove residual chloride ion (coming from noble metal precursor body) and need one to add in subsequent handling when noble-metal-supported
The process of thermal evaporation, therefore technique is still more complex.Meanwhile electrostatic spinning prepares TiO2There are still high expensive, equipment to want for fiber
The problems such as asking high, large-scale production there is also certain difficulties.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of compound first of flexibility Pt in view of the deficiencies of the prior art
A kind of aldehyde room-temperature oxidation catalyst and preparation method thereof, and in particular to Pt/TiO2The catalysis of/cotton fiber composite formaldehyde Oxidation at room temperature
Agent and preparation method thereof.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of Pt/TiO2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst, including cotton fiber carrier, TiO2Surface applies
Layer and be dispersed in TiO2The Pt active component of coating surface, the cotton fiber carrier are degreasing cotton fiber, itself is just
There are graduation macropore-central hole structure, the TiO2Coating is nanometer titanium dioxide coating, and the Pt exists in the form of zeroth order,
1~10nm of particle size range.
In above scheme, the platinum load capacity is 0.05~2wt%, and optimal load capacity is in 0.25~0.75wt%.
Above-mentioned Pt/TiO2The preparation method of/cotton fiber composite formaldehyde room-temperature oxidation catalyst, first by Titanium alkoxides in acid
It is hydrolyzed in property aqueous solution, stable TiO is obtained after stirring2Colloidal sol；Then pass through infusion process for nano-TiO2It is equably coated
In cotton fiber surface, separated, it is dry, obtain TiO2/ cotton fiber composite substrate materials；Then with TiO2/ cotton fiber is
Substrate is separately added into complexing agent and reducing agent using chloroplatinic acid as predecessor, then passes through dipping-reduction-sedimentation for active component
Pt is carried on TiO2Coating surface repeatedly finally by alkali cleaning, washing removes the residual chloride ion on surface, obtains Pt/TiO2/ cotton
Flower fiber composite formaldehyde room temperature oxidation catalyst.
According to the above scheme, the Pt/TiO2The preparation method of/cotton fiber composite formaldehyde room-temperature oxidation catalyst be by
Titanium alkoxides are dissolved in dehydrated alcohol, and acetylacetone,2,4-pentanedione is added, and stirring forms clear solution, is then added dropwise to pH=2~3 and contains
It in the acidic aqueous solution of PVA, stirs 4~8 days and obtains stable colloidal sol, then pass through infusion process for TiO2Nanoparticle is equably
Painting invests cotton fiber surface, is separated, is dried to obtain TiO2/ cotton fiber composite substrate materials, wherein water, dehydrated alcohol,
The molar ratio of acetylacetone,2,4-pentanedione and Titanium alkoxides is=100:2~4:0.1~0.5:0.1~0.5；Content of the PVA in acid water be
0.01~0.1%；Using chloroplatinic acid as predecessor, complexing agent and reducing agent is added, it will be active by dipping~reduction~sedimentation
Component Pt is carried on TiO2Coating surface repeatedly finally by alkali cleaning, washing removes the residual chloride ion on surface, obtains after dry
To Pt/TiO2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst.
According to the above scheme, the Titanium alkoxides are one of four isopropyl ester of metatitanic acid, butyl titanate or two kinds of mixing
Object；The acidic materials are nitric acid, the mixture of sulfuric acid or both；The complexing agent is trisodium citrate or ethylenediamine tetraacetic
The mixture of acetic acid disodium (EDTA) or both；The reducing agent is the mixture of potassium borohydride, sodium borohydride or both.Institute
The alkali cleaning stated is that the mixture of any one aqueous solution or in which two kinds or three kinds substances with NaOH, in KOH and ammonium hydroxide is water-soluble
Liquid washing.
The infusion process is that cotton fiber is immersed in TiO2In colloidal sol, soaking time is 5~10min, wherein cotton
And TiO2Mass ratio be 1:2~3；Described is separated into strainer separation；Drying condition: first at 50~70 DEG C, dry 3~
10min, then at 110~120 DEG C, dry 20~40min, above-mentioned coated process can repeat the above process 1~2 time, most
60~110 DEG C of primary drying temperature afterwards, 4~12h of drying time.
Dipping~reduction~the sedimentation are as follows: by TiO2/ cotton fiber composite material is scattered in containing chloroplatinic acid and network
5~10min is impregnated in the mixed solution of mixture, wherein chloroplatinic acid is calculated as accounting for TiO with Pt content2/ cotton fiber composite base ground
0.05~2wt% of material, is subsequently added into the alkaline solution (pH is between 8.0~10.0) of reducing agent, by noble metal at metal
The molar ratio of nanoparticle, wherein chloroplatinic acid, complexing agent and reducing agent is 1:2:5~30, continues 5~10min of stirring, then will
The composite fibre for being deposited with Pt is separated with solution, 60~110 DEG C dry 4~for 24 hours, obtain Pt/TiO2The compound first of/cotton fiber
Aldehyde room-temperature oxidation catalyst.
Pt/TiO provided by the present invention2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst have graduation mesoporous~
The features such as macroporous structure, lightweight and flexibility, can avoid traditional catalyst be applied to filled-type cleaning equipment in need tabletting or into
One step, which is supported on other bulk type carriers, to be used and the vapour lock that generates is big and the caducous problem of catalyst, can also
Avoid the problem that there is frangibility in use as inorganic nano-fiber.Pt and TiO2It is tied between coating and carrier cotton fiber
It closes securely, active component simple substance Pt is in TiO2Between 1~10nm, room temperature can efficient catalytic for coating surface good dispersion, partial size
Decomposing formaldehyde, noble metal dosage is small, is suitable for using in all kinds of air purifiers.
Compared with prior art, the invention has the following beneficial effects:
(1) catalyst of the invention is inorganic-organic composite, Pt and TiO2It is combined between coating and carrier cotton fiber
Securely, while there is graduation mesoporous-macroporous structure, active component Pt component in the carrier good dispersion, partial size in 1-10nm
Between and be 0 valence, room temperature can efficiently catalyzing and oxidizing formaldehyde, vapour lock is small, and precious metals pt dosage is small.
(2) catalyst prod has the characteristics that flexible, light, suede bulk and is not easily broken, and may be directly applied to various fill out
It fills in type cleaning equipment, can avoid traditional catalyst and be applied to need tabletting in filled-type cleaning equipment or further be loaded
Could be used on other bulk type carriers and the vapour lock that generates greatly and the caducous problem of catalyst, it is also avoidable to be received as inorganic
There is frangibility in use in rice fiber.
(3) since residual chloride ion (coming from presoma chloroplatinic acid) has strong influence to catalytic activity, it is therefore necessary to
Chloride ion is removed, the method for alkali cleaning and washing is used to remove remaining chloride ion in the present invention, without subsequent high temperature heating dechlorination
Process has saved energy consumption.
(4) preparation method simple process, raw material sources are wide, at low cost, reproducible, are suitble to industrialized production.
Detailed description of the invention
Fig. 1 is the FESEM photo of catalyst sample prepared by the embodiment of the present invention 1.
Fig. 2 is TEM (a) and high-resolution TEM (b) photo of catalyst sample prepared by the embodiment of the present invention 1.
Fig. 3 is the XPS spectrum figure of catalyst prepared by the embodiment of the present invention 1.
Fig. 4 is the formaldehyde room temperature oxidation Activity Results figure of the catalyst of the embodiment of the present invention 1, and specially concentration of formaldehyde is with anti-
Answer time variation diagram.
Specific embodiment
Below in conjunction with specific embodiments of the present invention, the present inventor's content is done and is further described, but this
The protection scope of invention is not limited to these examples.It is all to be included in without departing substantially from the change of present inventive concept or equivalent substitute
Within protection scope of the present invention.
Embodiment 1
(1) butyl titanate is dissolved in dehydrated alcohol first, be added acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise in acidity (pH=2) aqueous solution of the PVA containing 0.01%, stirs 6 days and obtain stable TiO2Colloidal sol, wherein water,
The molar ratio of dehydrated alcohol, acetylacetone,2,4-pentanedione and butyl titanate is=100:2:0.5:0.5.
(2) absorbent cotton is immersed in the TiO of step (1)2In colloidal sol, soaking time 5min, wherein absorbent cotton and TiO2's
Mass ratio is 1:2.0；After strainer separates, the first dry 5min at 60 DEG C, then the dry 30min at 115 DEG C is repeated above-mentioned
Process, but drying temperature is 60 DEG C, and drying time 12h obtains TiO2/ cotton fiber composite substrate materials.
(3) complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirs evenly, by what is obtained in step (2)
TiO2/ cotton fiber composite substrate materials, which are scattered in above-mentioned mixed solution, impregnates 5min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.5wt%, adds the alkaline solution (pH value of reducing agent potassium borohydride
Be adjusted to 10 or so with the NaOH solution of 0.5M), chloroplatinic acid is reduced into metal nanoparticle, wherein chloroplatinic acid, complexing agent with
The molar ratio of reducing agent is 1:2:30, continues to stir 5min, then has the cotton fiber of platinum to separate load, then with 0.1M's
NaOH is washed 3 times, and deionized water is washed 3 times, and then 60 DEG C of dry 12h, obtain Pt/TiO2The catalysis of/cotton fiber Oxidation at room temperature
Agent.
The Pt/TiO of above-mentioned preparation2Fig. 1, Fig. 2 and Fig. 3 are shown in the FESEM of/cotton fiber, TEM and XPS spectrum map analysis respectively,
As it can be seen that the Pt/TiO in Fig. 12/ cotton fiber is in coated TiO2And fibre structure obtains intact holding before and after supporting Pt,
Middle TiO2Partial size is supported on to coating uniform cotton fiber surface, precious metals pt is with the presence of zeroth order simple substance form between 1-10nm
(this can be seen that by two characteristic peaks of 71.2eV and 74.8eV in Fig. 3) 3~10nm of particle size range, is highly dispersed at TiO2Coating
Surface.
The preparation of 2 formaldehyde room temperature oxidation catalyst of embodiment
(1) butyl titanate is dissolved in dehydrated alcohol first, be added acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise in acidity (pH=2.5) aqueous solution of the PVA containing 0.05%, stirs 8 days and obtain stable TiO2Colloidal sol, wherein
The molar ratio of water, acid, dehydrated alcohol, acetylacetone,2,4-pentanedione and butyl titanate is=100:4:0.5:0.5.
(2) absorbent cotton is immersed in the TiO of step (1)2In colloidal sol, soaking time 5min, wherein cotton and TiO2Matter
Amount is than being 1:2.5, and after strainer separates, dry 12h, obtains TiO at 60 DEG C2/ cotton fiber composite substrate materials.
(3) complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirs evenly, by what is obtained in step (2)
TiO2/ cotton fiber composite substrate materials, which are scattered in above-mentioned mixed solution, impregnates 5min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.25wt%, adds the alkaline solution (pH value of reducing agent potassium borohydride
8 or so are adjusted to the NaOH solution of 0.5M), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, complexing agent and reduction
The molar ratio of agent is 1:2:15, continues to stir 5min, then has the cotton fiber of platinum to separate load, then washed with the KOH of 0.1M
It washs 3 times, deionized water is washed 3 times, and then 80 DEG C of dry 10h, obtain Pt/TiO2/ cotton fiber room-temperature oxidation catalyst.
The preparation of 3 formaldehyde room temperature oxidation catalyst of embodiment
(1) butyl titanate is dissolved in dehydrated alcohol first, be added acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise in acidity (pH=3) aqueous solution of the PVA containing 0.01%, stirs 4 days and obtain stable TiO2Colloidal sol, wherein water,
The molar ratio of dehydrated alcohol, acetylacetone,2,4-pentanedione and butyl titanate is=100:2:0.1:0.1.
(2) absorbent cotton is immersed in TiO2In colloidal sol, soaking time 5min, wherein cotton and TiO2Mass ratio be 1:
2, after strainer separates, at 80 DEG C, drying time 10h obtains TiO2/ cotton fiber composite substrate materials.
(3) complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirs evenly, by what is obtained in step (2)
TiO2/ cotton fiber composite substrate materials, which are scattered in above-mentioned mixed solution, impregnates 5min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.1wt%, adds the alkaline solution (pH value of reducing agent potassium borohydride
8 or so are adjusted to the NaOH solution of 0.5M), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, complexing agent and reduction
The molar ratio of agent is 1:2:5, continues to stir 5min, then has the cotton fiber of platinum to separate load, then washed with the NaOH of 0.2M
It washs 3 times, deionized water is washed 3 times, and then 60 DEG C of dry 12h, obtain Pt/TiO2/ cotton fiber room-temperature oxidation catalyst.
The preparation of 4 formaldehyde room temperature oxidation catalyst of embodiment
(1) butyl titanate is dissolved in dehydrated alcohol first, be added acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise in acidity (pH=2) aqueous solution of the PVA containing 0.01%, stirs 6 days and obtain stable TiO2Colloidal sol, wherein water,
The molar ratio of dehydrated alcohol, acetylacetone,2,4-pentanedione and butyl titanate is=100:3:0.25:0.25.
(2) absorbent cotton is immersed in TiO2In colloidal sol, soaking time 10min, wherein cotton and TiO2Mass ratio be 1:
3.0, after strainer separates, first 10min dry at 60 DEG C, then at 60 DEG C, drying time 12h obtains TiO2/ cotton fiber
Composite substrate materials.
(3) complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirs evenly, by what is obtained in step (2)
TiO2/ cotton fiber composite substrate materials, which are scattered in above-mentioned mixed solution, impregnates 10min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.75wt%, adds the alkaline solution (pH value of reducing agent sodium borohydride
9 or so are adjusted to the NaOH solution of 0.5M), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, complexing agent and reduction
The molar ratio of agent is 1:2:15, continues to stir 5min, then has the cotton fiber of platinum to separate load, then washed with the ammonium hydroxide of 0.1M
It washs 3 times, deionized water is washed 3 times, and then 100 DEG C of dry 6h, obtain Pt/TiO2/ cotton fiber room-temperature oxidation catalyst.
The preparation of 5 formaldehyde room temperature oxidation catalyst of embodiment
(1) tetraisopropyl titanate is dissolved in dehydrated alcohol first, acetylacetone,2,4-pentanedione is added, stirring forms clear solution, so
It is added dropwise in acidity (pH=2) aqueous solution of the PVA containing 0.1% afterwards, stirs 6 days and obtain stable TiO2Colloidal sol, wherein
The molar ratio of water, dehydrated alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.5:0.5.
(2) absorbent cotton is immersed in TiO2In colloidal sol, soaking time 5min, wherein cotton and TiO2Mass ratio be 1:
2, after strainer separates, the first dry 5min at 60 DEG C, then the dry 6h at 100 DEG C obtains TiO2/ cotton fiber composite substrate
Material.
(3) complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirs evenly, by what is obtained in step (2)
TiO2/ cotton fiber composite substrate materials, which are scattered in above-mentioned mixed solution, impregnates 5min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 1.0wt%, adds the alkaline solution (pH value of reducing agent sodium borohydride
Be adjusted to 10 or so with the NaOH solution of 0.5M), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, complexing agent with also
The molar ratio of former agent be 1:2:30, continue stir 5min, then will load have platinum cotton fiber separate, then with respectively 0.1M
NaOH and KOH mixed liquor wash 3 times, deionized water wash 3 times, then 60 DEG C of dry 12h, obtain Pt/TiO2/ cotton fiber
Room-temperature oxidation catalyst.
The preparation of 6 formaldehyde room temperature oxidation catalyst of embodiment
(1) tetraisopropyl titanate is dissolved in dehydrated alcohol first, acetylacetone,2,4-pentanedione is added, stirring forms clear solution, so
It is added dropwise in acidity (pH=2.5) aqueous solution of the PVA containing 0.1% afterwards, stirs 6 days and obtain stable TiO2Colloidal sol,
The molar ratio of middle water, dehydrated alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.25:0.25.
(2) absorbent cotton is immersed in TiO2In colloidal sol, soaking time 8min, wherein cotton and TiO2Mass ratio be 1:
2.5, after strainer separates, first 5min dry at 60 DEG C, then at 120 DEG C, drying time 4h obtains TiO2/ cotton fiber
Composite substrate materials.
(3) complexing agent EDTA will be added in platinum acid chloride solution again, stirs evenly, the TiO that will be obtained in step (2)2/ cotton
Fiber composite base material is scattered in above-mentioned mixed solution and impregnates 8min, and wherein chloroplatinic acid is in terms of platinum relative to TiO2/ cotton
The quality of fiber composite base material be 2.0wt%, add reducing agent sodium borohydride alkaline solution (pH value 0.5M's
NaOH solution is adjusted to 9 or so), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, mole of complexing agent and reducing agent
Than for 1:2:25, continuing to stir 5min, then there is the cotton fiber of platinum to separate load, then with the respectively NaOH of 0.05M,
KOH and ammonium hydroxide mixed solution wash 3 times, and deionized water is washed 3 times, and then 110 DEG C of dry 4h, obtain Pt/TiO2/ cotton fiber
Room-temperature oxidation catalyst.
The preparation of 7 formaldehyde room temperature oxidation catalyst of embodiment
(1) tetraisopropyl titanate is dissolved in dehydrated alcohol first, acetylacetone,2,4-pentanedione is added, stirring forms clear solution, so
It is added dropwise in acidity (pH=2) aqueous solution of the PVA containing 0.25% afterwards, stirs 4 days and obtain stable TiO2Colloidal sol, wherein
The molar ratio of water, dehydrated alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.1:0.1.
(2) absorbent cotton is immersed in TiO2In colloidal sol, soaking time 5min, wherein cotton and TiO2Mass ratio be 1:
2.6, after strainer separates, the dry 4min at 60 DEG C, then at 115 DEG C, drying time 30min, repeat the above process 1 time,
The finally dry 4h at 110 DEG C, obtains TiO2/ cotton fiber composite substrate materials.
(3) complexing agent EDTA will be added in platinum acid chloride solution again, stirs evenly, the TiO that will be obtained in step (2)2/ cotton
Fiber composite base material is scattered in above-mentioned mixed solution and impregnates 5min, and wherein chloroplatinic acid is in terms of platinum relative to TiO2/ cotton
The quality of fiber composite base material be 0.25wt%, add reducing agent sodium borohydride alkaline solution (pH value 0.5M's
NaOH solution is adjusted to 10 or so), chloroplatinic acid is reduced into Pt nanoparticle, wherein chloroplatinic acid, complexing agent and reducing agent rub
Your ratio is 1:2:15, continues to stir 5min, then has the cotton fiber of platinum to separate load, then washed 3 times with the KOH of 0.1M,
Deionized water is washed 3 times, and then 60 DEG C of dry 12h, obtain Pt/TiO2/ cotton fiber room-temperature oxidation catalyst.
To investigate catalyst prepared by the present invention catalyzing oxidizing degrading effect of formaldehyde at room temperature, the present inventor is pressed with lower section
Method tests its room temperature degradation of formaldehyde performance.Test process is as follows: catalyst 0.3g being taken to be laid in the table that diameter is 14cm
Face ware surface, covers glass cover, this is then attached with the surface plate of catalyst as in the organic glass reactor of 5.9L, instead
It answers bottom in device to place the fan of a 5W, then a certain amount of concentrated formaldehyde solution is injected in reactor, fan is opened, until formaldehyde
Volatilization removes glass cover until concentration balance, and catalyst and formaldehyde start haptoreaction at this time, passes through multiple groups in the process
Divide gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring formaldehyde and product titanium dioxide
The concentration of carbon changes.
The 60min activity data of the catalyst prepared in Examples 1 to 7 is shown in Table 1.As known from Table 1, catalyst of the invention
Under conditions of relatively low Pt load capacity, good catalytic activity is all had.
Table 1
The another repeat performance to investigate catalyst of the present invention, the special catalyst sample by embodiment 1 reuse 4
It is secondary, its Repeatability is observed, the results are shown in Table 2, as seen from Table 2: catalyst of the invention is in multiple use process, activity
It is held essentially constant, illustrates that catalyst activity of the present invention is stablized.
Table 2
Claims (3)
1. a kind of flexibility platinum formaldehyde room temperature oxidation catalyst, it is characterised in that: the catalyst includes cotton fiber carrier, TiO2Table
Finishing coat and it is dispersed in TiO2The Pt active component of coating surface；Steps are as follows for the preparation method of the catalyst:
(1) Titanium alkoxides are dissolved in dehydrated alcohol, be added acetylacetone,2,4-pentanedione, stirring form clear solution, be then added dropwise to containing
In the acidic aqueous solution of PVA, stirs 4-8 days and obtain stable TiO2Colloidal sol；
The content of the PVA in water is 0.01-0.1 %, wherein mole of water, dehydrated alcohol, acetylacetone,2,4-pentanedione and Titanium alkoxides
Than for 100:2-4:0.1-0.5:0.1-0.5；
The Titanium alkoxides are one of tetraisopropyl titanate, butyl titanate or two kinds of mixture；
(2) cotton fiber is immersed in the TiO of step (1)2In colloidal sol, soaking time be 5-10 min, wherein cotton fiber and
TiO2Mass ratio be 1:2-3, strainer separates after immersion, dry, obtains TiO2/ cotton fiber composite substrate materials；
The drying condition are as follows: first in 50-70oUnder C, dry 3-10 min, then in 110-120oUnder C, dry 20-40
Min, above-mentioned coated process repeat 1-2 times, the drying temperature 60-110 of last timeoC, drying time 4-12 h；
(3) by the TiO of step (2)2/ cotton fiber composite substrate materials are scattered in the mixed solution containing chloroplatinic acid and complexing agent
5-10 min is impregnated, wherein chloroplatinic acid is calculated as accounting for TiO with Pt content2The 0.25-2wt% of/cotton fiber composite substrate materials, connects
Be added reducing agent alkaline solution, Pt is reduced into metal nanoparticle, wherein chloroplatinic acid, mole of complexing agent and reducing agent
Than for 1:2:5-30, continuing to stir 5-10 min, then the composite fibre for being deposited with Pt is separated with solution, then pass through alkali cleaning,
Washing repeatedly, removes the residual chloride ion on surface, finally in 60-110oC dries 4-24 h, obtains Pt/TiO2/ cotton fiber is multiple
Formaldehyde room temperature oxidation catalyst is closed,
The cotton fiber carrier is degreasing cotton fiber；
The TiO2Coating is nanometer titanium dioxide coating, is equably supported on cotton fiber surface, partial size is between 1-10nm；
The Pt exists in the form of zeroth order, particle size range 1-10 nm, and load capacity is 0.25-2 wt %.
2. a kind of flexible platinum formaldehyde room temperature oxidation catalyst according to claim 1, it is characterised in that: institute in step (1)
Acidic materials in the acidic aqueous solution of the PVA stated are one or both of nitric acid, sulfuric acid；
The pH of the acidic aqueous solution of the PVA is between 2.0-3.0.
3. a kind of flexible platinum formaldehyde room temperature oxidation catalyst according to claim 1, it is characterised in that: institute in step (3)
The complexing agent stated is one or both of trisodium citrate, disodium ethylene diamine tetraacetate；
The reducing agent is one or both of potassium borohydride, sodium borohydride；
The alkali cleaning is the mixing with any one aqueous solution or in which two kinds or three kinds substances in NaOH, KOH and ammonium hydroxide
The washing of object aqueous solution.
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| CN108797107B (en) * | 2018-05-31 | 2020-07-28 | 深圳大学 | Formaldehyde purification fiber and preparation method thereof |
| CN109364994A (en) * | 2018-09-10 | 2019-02-22 | 深圳大学 | Loaded photocatalyst and its application |
| CN109465038A (en) * | 2018-12-06 | 2019-03-15 | 武汉纺织大学 | A kind of preparation method of the material for degradation of dye waste water |
| CN111644052A (en) * | 2020-05-06 | 2020-09-11 | 江苏卓高环保科技有限公司 | Novel high-efficiency catalytic formaldehyde material and digital display formaldehyde purifier prepared from same |
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