CN101209412A - Titanium dioxide sol for preparing broad-spectrum photocatalytic material and preparation method thereof - Google Patents
Titanium dioxide sol for preparing broad-spectrum photocatalytic material and preparation method thereof Download PDFInfo
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- CN101209412A CN101209412A CNA2006101616482A CN200610161648A CN101209412A CN 101209412 A CN101209412 A CN 101209412A CN A2006101616482 A CNA2006101616482 A CN A2006101616482A CN 200610161648 A CN200610161648 A CN 200610161648A CN 101209412 A CN101209412 A CN 101209412A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 20
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 16
- 239000010936 titanium Substances 0.000 claims abstract description 16
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000012986 modification Methods 0.000 claims abstract description 13
- 230000004048 modification Effects 0.000 claims abstract description 13
- 150000002484 inorganic compounds Chemical class 0.000 claims abstract description 12
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 12
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 12
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 11
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims abstract description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052709 silver Inorganic materials 0.000 claims abstract description 3
- 239000004332 silver Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 11
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 8
- 238000001228 spectrum Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- 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 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 4
- 150000001298 alcohols Chemical group 0.000 claims description 2
- 239000003125 aqueous solvent Substances 0.000 claims description 2
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 claims description 2
- 229910000348 titanium sulfate Inorganic materials 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000013032 photocatalytic reaction Methods 0.000 abstract 2
- 229910003471 inorganic composite material Inorganic materials 0.000 abstract 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- -1 hydroxyl radical free radical Chemical class 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- LXASOGUHMSNFCR-UHFFFAOYSA-D [V+5].[V+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O Chemical compound [V+5].[V+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O LXASOGUHMSNFCR-UHFFFAOYSA-D 0.000 description 1
- DCGQUTJLMIWWSV-UHFFFAOYSA-N [W].[N+](=O)(O)[O-] Chemical compound [W].[N+](=O)(O)[O-] DCGQUTJLMIWWSV-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Catalysts (AREA)
Abstract
Titanium dioxide sol for preparing broad spectrum photocatalytic material and its preparation method. The invention relates to a titanium dioxide sol for preparing a broad-spectrum photocatalytic material and a preparation method thereof. The titanium-doped organic/inorganic composite material contains organic compounds or inorganic compounds of titanium and a solvent, and also contains soluble nitrate or organic salt of metal ions for modification doping, wherein the metal ions for modification doping are palladium, iron, tungsten, silver, vanadium, iron, cadmium or zirconium; wherein the weight of the organic compound or the inorganic compound of titanium accounts for 1-30% of the total weight in terms of titanium dioxide; the weight ratio of the soluble nitrate or organic salt of the metal ions for modification doping to the titanium dioxide is 0.01-0.2: 1 after the soluble nitrate or organic salt is converted into metal oxide. The invention adopts proper chemical substances and a treatment method to modify the titanium dioxide catalyst, so that the treated catalyst has higher photocatalytic reaction activity, and can utilize ultraviolet light with larger wavelength, even realize photocatalytic reaction under natural light.
Description
Technical field
The invention belongs to antibiotic and catalysis material and preparation method thereof, particularly a kind of TiO 2 sol of preparing wide spectrum photocatalytic material and preparation method thereof that can be used for.
Background technology
Along with the expansion of worker, Agricultural Development and urban population, the pollution problem of foul gas is outstanding day by day, and caused for people's quality of life and have a strong impact on, and the direct health of harmful to human.Aspect foul smell source, city, the collection of municipal wastewater and processing procedure are to cause the main cause of foul smell discharging, and wherein the foul smell emission behaviour of sewage pumping station and sewage treatment plant is the most serious.In addition, also can discharge a large amount of foul gas in places such as the collection of domestic waste, ight soil, transhipments, to around environmental quality do great damage, also affect the image of modern metropolitan cities simultaneously.Along with the raising of the public, in rapid increase, become and one of environmental issue to be solved at the incident of the complaint of the pollution problem of stench and complaint to living environment quality consciousness.
Conventional foul gas improvement technology mainly contains absorption method, absorption process and biological decomposition method etc.But because the particularity of municipal wastewater foul smell that system discharges, said method is difficult to it is carried out economy, effectively handles, and is badly in need of exploiting economy and effectively administers new technology.
In recent years, be that the photocatalysis oxidation technique of catalyst receives publicity in the waste gas purification Application for Field with the metal oxide semiconductor.This technology is directly utilized ultraviolet light activated catalyst at normal temperatures, makes its surface generate free electron (e) and hole (H
+) right, the luminous energy that absorbs is changed into chemical energy, promptly have photocatalysis.When being free G﹠W steam to exist, free electron on the catalyst surface or hole are decomposed and can be produced the hydroxyl radical free radical (OH) of strong oxidizing property, oxygen (O), ozone (O3) and the hydrogen peroxide (H of atomic state with adsorbed water or steam effect
2O
2) etc., these materials have very strong oxidation, thereby with the smell substance in the waste gas (as hydrogen sulfide, ammonia etc.) oxidation Decomposition, reach deodorizing effect.
Titanium dioxide (TiO2) is the photochemical catalyst that using value is arranged most at present, and existing application in the waste gas purification field.Yet, simple can only utilize the ultraviolet light of wavelength during as photochemical catalyst less than 387.5nm with titanium dioxide, the light bigger for wavelength can't utilize.Because the natural daylight medium wavelength is less than the light proportion very little (＜4%) of 387.5nm, therefore general photochemical catalyst can't effectively utilize natural daylight.And because light wavelength that most ultraviolet source produces also distributes in certain limit, its medium wavelength also can't be utilized effectively greater than the light of 387.5nm, causes energy dissipation to a great extent.In these cases,, make photochemical catalyst can utilize the light source of wavelength broad, the utilization ratio of all luminous energy is increased, even can directly utilize natural daylight if can adopt suitable processing method.
The disclosed application number of State Intellectual Property Office is 200410029904.3, and name is called the patented technology of " a kind of nano titanic oxide sol and preparation method thereof ", and it provides a kind of nano titanic oxide sol with photo-catalysis function and preparation method thereof.But it can only realize photocatalysis under ultraviolet light.
Summary of the invention
The present invention is directed to above problem, to provide a kind of be catalyst with the metal oxide semiconductor, and what make that titanium dioxide can realize photocatalysis under broad spectrum is used to TiO 2 sol for preparing wide spectrum photocatalytic material and preparation method thereof.
Technical scheme of the present invention is: it contains organic compound or the inorganic compound and the solvent of titanium, it also contains solubility nitrate or the organic salt of modification doping with metal ion, and it is palladium, iron, tungsten, silver, vanadium, iron, cadmium or zirconium that described modification is mixed with metal ion; Wherein the conversion of the organic compound of titanium or inorganic compound accounts for 1～30% of total amount for the weight of titanium dioxide; Modification mix with the solubility nitrate of metal ion or organic salt convert be metal oxide after, with the weight ratio of titanium dioxide be 0.01～0.2: 1.
Described solvent is alcohols solvent or aqueous solvent.
The organic compound of described titanium is: titanium tetraisopropylate acid esters, butyl titanate, and inorganic compound is: titanium sulfate, titanium tetrachloride; Wherein one or more.
Described modified metal compound is the solubility nitrate of palladium bichloride or iron, tungsten, vanadium, iron, cadmium, zirconium or in the organic salt one or more.
Preparation method of the present invention, it comprises the steps:
1) organic compound of titanium or inorganic compound are added in the solvent stir, wherein the conversion of the organic compound of titanium or inorganic compound accounts for 2～30% of target solution total amount for the weight of titanium dioxide; Being concentration 1～10% hydrochloric acid again adds above-mentioned solution by 1: 0.5～2 volume ratio, stirs; Adjust pH value to 6～7 of mixed liquor afterwards, stirred 3～7 minutes, make A solution;
2) choose modification and mix, for high valence state metal oxide metering, use deionized water that it is formulated as the solution of concentration 1～5% its conversion, make B solution with the solubility nitrate or the organic salt of metal ion;
3) A, B are mixed, make that the ratio of blended metal oxide and titanium dioxide weight is 0.01～0.2: 1 in the solution; Adjust the pH of mixed value afterwards and be transferred to 6.5～7.5, and stir, make.
The present invention is based on photocatalysis technology principle and absorption-kinetics theory, adopted suitable chemical substance and processing method that titanium deoxide catalyst is carried out modification, make the catalyst after the processing have higher light-catalyzed reaction activity, and can utilize the bigger ultraviolet light of wavelength, or even under natural daylight, realize light-catalyzed reaction.The material that is used for modification has metal oxide semiconductors such as palladium, tungsten, vanadium, iron, cadmium, zirconium and ammonium salt etc.
The specific embodiment
Embodiment 1
1) getting 200mL concentration is 90% titanium tetraisopropylate acid esters, inserts in the container of 1L, and is diluted to 500mL with isopropyl alcohol (chemical pure 90%).Slowly add 10% aqueous hydrochloric acid solution 100mL again, and under the rotating speed of 200rpm, stir with electric mixer.Afterwards, will reconcile about the pH value to 6.5 of above-mentioned mixed liquor with 30% ammonia spirit again, and stir 5 minutes, make standby Sol A solution.
2) getting concentration is 10% palladium chloride solution 20mL, with deionized water it is diluted to 50mL after, slowly be added in the container of splendid attire Sol A solution, and constantly stir.To mix the pH value with 30% ammonia spirit again and be transferred to about 7, and continue to stir fast to make C liquid, colloidal sol promptly of the present invention.The content of titanium is 12% (by content of titanium dioxide) in this colloidal sol, and the content of palladium is 0.16%.
Get above-mentioned colloidal sol, fully stir the back and it is spread upon on 300cm * 200 ceramic plane with brush, oven dry about 100 ℃ afterwards, smear-dry 2-3 time more repeatedly after, afterwards at 300-400 ℃ of calcination 2-3 hour.After the cooling, pottery is inserted in the nature indoor environment.Interpretation of result, under the effect of natural daylight, ceramic plane has antibacterial action preferably.Compare with the ceramic plane of not smearing collosol substance, total number of bacterial colonies has reduced 90%.As seen, modified photocatalytic technology used herein has good antibacterial effect.
Embodiment 2
1) getting 500mL concentration is 90% titanium tetraisopropylate acid esters, inserts in the big mouthful of container of 10L, and is diluted to 5L with isopropyl alcohol (chemical pure 90%).Slowly add 10% aqueous hydrochloric acid solution 500L again, and under the rotating speed of 200rpm, stir with electric mixer.Afterwards, will reconcile about the pH value to 6.5 of above-mentioned mixed liquor with 30% ammonia spirit again, and stir 5 minutes, make standby Sol A solution.
2) getting concentration is 40% vanadium oxalate solution 50mL, with deionized water it is diluted to 500mL after, slowly be added in the container of splendid attire Sol A solution, and constantly stir.To mix the pH value with 30% ammonia spirit again and be transferred to about 7, and continue to stir fast to make C liquid, colloidal sol promptly of the present invention.The content of titanium is 3.0% (by content of titanium dioxide) in this colloidal sol, and the content of vanadium is 0.1%.
Get above-mentioned colloidal sol 500mL, use after fully stirring 100g viscose-based active carbon fiber net is immersed wherein.Soak after 2-3 hour, with its oven dry, and 300-400 ℃ of (nitrogen protection) calcination 2-3 hour. after the cooling, used as the screen pack of indoor air cleaner.The result shows, after clarifier uses 500 hours, without on the NACF of above-mentioned processing by more bacterial reproduction and enrichment, and adopt the processed active carbon fiber, then the bacterium enriching quantity seldom.
Embodiment 3
1) getting 100mL concentration is 95% titanium tetrachloride, insert in the there-necked flask of 2L, slowly add isopropyl alcohol (chemical pure 90%) 500mL in flask, titanium tetrachloride generates the titanium tetraisopropylate acid esters by reacting with isopropyl alcohol, discharges hydrogen chloride gas (need absorb with solution purification) simultaneously.
2) utilize isopropyl alcohol that the formed titanium tetraisopropylate acid esters of above-mentioned reaction is diluted to 1L.Slowly add 10% aqueous hydrochloric acid solution 100mL again, and under the rotating speed of 200rpm, stir with electric mixer.Afterwards, will reconcile about the pH value to 6.5 of above-mentioned mixed liquor with 30% ammonia spirit again, and stir 5 minutes, make standby Sol A solution.
3) getting concentration is 10% nitric acid tungsten solution 10mL, with deionized water it is diluted to 100mL after, slowly be added in the container of splendid attire Sol A solution, and constantly stir.To mix the pH value with 30% ammonia spirit again and be transferred to about 7, and continue to stir fast to make C liquid, colloidal sol promptly of the present invention.The content of titanium is 6.2% (by content of titanium dioxide) in this colloidal sol, and the content of tungsten is 0.07%.
Get above-mentioned colloidal sol 500mL, use after fully stirring 100g viscose-based active carbon fiber net is immersed wherein.Soak after 2-3 hour, with its oven dry, and 300-400 ℃ of (nitrogen protection) calcination 2-3 hour. after the cooling, in the photochemical catalyst reactor with its ultraviolet lamp tube of having 6 15W of packing into, be used to handle the foul smell that contains hydrogen sulfide.
Test result shows, when exhaust gas flow is 4000m
3/ h, concentration of hydrogen sulfide are 10mg/m
3The time, by above-mentioned photochemical catalyst device, the clearance of hydrogen sulfide can be reached more than 95% steadily in the long term, the stink of waste gas is eliminated substantially, satisfies environmental requirement fully.Yet when NACF did not contain photochemical catalyst, the removal efficient of hydrogen sulfide only was about 70%, and removed efficient progressively decline with the prolongation of the running time of equipment.As seen, modified photocatalytic technology used herein has good waste gas purification effect.
Test result shows, when exhaust gas flow is 500m
3/ h, concentration of hydrogen sulfide are 15mg/m
3The time, by above-mentioned photocatalysis apparatus, the clearance of hydrogen sulfide can be reached more than 90% steadily in the long term, the stink of waste gas is eliminated substantially, can satisfy environmental requirement.
Claims (5)
1. TiO 2 sol that is used to prepare wide spectrum photocatalytic material, it contains organic compound or the inorganic compound and the solvent of titanium, it is characterized in that, it also contains solubility nitrate or the organic salt of modification doping with metal ion, and it is palladium, iron, tungsten, silver, vanadium, iron, cadmium or zirconium that described modification is mixed with metal ion; Wherein the conversion of the organic compound of titanium or inorganic compound accounts for 1～30% of total amount for the weight of titanium dioxide; Modification mix with the solubility nitrate of metal ion or organic salt convert be metal oxide after, with the weight ratio of titanium dioxide be 0.01～0.2: 1.
2. the TiO 2 sol that is used to prepare wide spectrum photocatalytic material according to claim 1 is characterized in that, described solvent is alcohols solvent or aqueous solvent.
3. the TiO 2 sol that is used to prepare wide spectrum photocatalytic material according to claim 1 is characterized in that, the organic compound of described titanium is: titanium tetraisopropylate acid esters, butyl titanate, and inorganic compound is: titanium sulfate, titanium tetrachloride; Wherein one or more.
4. the TiO 2 sol that is used to prepare wide spectrum photocatalytic material according to claim 1, it is characterized in that described modified metal compound is the solubility nitrate of palladium bichloride or iron, tungsten, vanadium, iron, cadmium, zirconium or in the organic salt one or more.
5. the described preparation method who is used to prepare the TiO 2 sol of wide spectrum photocatalytic material of a claim 1, it comprises the steps:
1) organic compound of titanium or inorganic compound are added in the solvent stir, wherein the conversion of the organic compound of titanium or inorganic compound accounts for 2～30% of target solution total amount for the weight of titanium dioxide; Being concentration 1～10% hydrochloric acid again adds above-mentioned solution by 1: 0.5～2 volume ratio, stirs; Adjust pH value to 6～7 of mixed liquor afterwards, stirred 3～7 minutes, make A solution;
2) choose modification and mix, for high valence state metal oxide metering, use deionized water that it is formulated as the solution of concentration 1～5% its conversion, make B solution with the solubility nitrate or the organic salt of metal ion;
3) A, B are mixed, make that the ratio of blended metal oxide and titanium dioxide weight is 0.01～0.2: 1 in the solution; Adjust the pH of mixed value afterwards and be transferred to 6.5～7.5, and stir, make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101616482A CN101209412A (en) | 2006-12-29 | 2006-12-29 | Titanium dioxide sol for preparing broad-spectrum photocatalytic material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101616482A CN101209412A (en) | 2006-12-29 | 2006-12-29 | Titanium dioxide sol for preparing broad-spectrum photocatalytic material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974355A (en) * | 2012-12-11 | 2013-03-20 | 常州大学 | Loaded nano TiO2 photocatalyst turntable |
| CN103101973A (en) * | 2013-01-16 | 2013-05-15 | 曲阜师范大学 | Vanadium and palladium-codoped nanometer titania gas-sensitive material as well as preparation method and applications thereof |
| CN103657620A (en) * | 2013-11-19 | 2014-03-26 | 浙江大学 | Preparation method for anatase type microporous titanium dioxide material for purifying indoor air |
| CN107935519A (en) * | 2017-12-19 | 2018-04-20 | 哈尔滨工业大学 | A kind of non-evaporating diatom plate for supporting degradable formaldehyde and preparation method thereof |
-
2006
- 2006-12-29 CN CNA2006101616482A patent/CN101209412A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974355A (en) * | 2012-12-11 | 2013-03-20 | 常州大学 | Loaded nano TiO2 photocatalyst turntable |
| CN103101973A (en) * | 2013-01-16 | 2013-05-15 | 曲阜师范大学 | Vanadium and palladium-codoped nanometer titania gas-sensitive material as well as preparation method and applications thereof |
| CN103101973B (en) * | 2013-01-16 | 2014-05-21 | 曲阜师范大学 | Vanadium and palladium-codoped nanometer titania gas-sensitive material as well as preparation method and applications thereof |
| CN103657620A (en) * | 2013-11-19 | 2014-03-26 | 浙江大学 | Preparation method for anatase type microporous titanium dioxide material for purifying indoor air |
| CN103657620B (en) * | 2013-11-19 | 2015-09-30 | 浙江大学 | A kind of anatase titanium dioxide microporous titania materials preparation method purified the air of a room |
| CN107935519A (en) * | 2017-12-19 | 2018-04-20 | 哈尔滨工业大学 | A kind of non-evaporating diatom plate for supporting degradable formaldehyde and preparation method thereof |
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