CN101032687A - Nanometer quaternary photocatalyst for eliminating air pollution in small spaces and the preparing method - Google Patents
Nanometer quaternary photocatalyst for eliminating air pollution in small spaces and the preparing method Download PDFInfo
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Abstract
The present invention discloses one kind of nanometer quaternary photocatalyst for eliminating pollutant from air in a small space and its preparation process. The nanometer quaternary photocatalyst has nanometer titania as carrier, active component A of chloroplatinic acid in the Pt content of 0.1-0.6 wt% of nanometer titania, active component B of Li, K or Mg oxide in the amount of 0.5-2 wt% of nanometer titania, and active component C of Fe, V or Ni oxide in the amount of 3-6 wt% of nanometer titania. The photocatalyst is prepared through treating carrier and the subsequent steps. The photocatalyst under the excitation of ultraviolet ray can produce catalytic reaction to convert organic or inorganic pollutant in a small closed space into harmless matter and kill various pathogenic microbes effectively.
Description
Technical field the present invention relates to a kind of nanometer quaternary photocatalyst that is used for the little space of full spectrum elimination air pollutants and preparation method thereof.
Background technology is owing to modern industry is highly developed, each family macromolecule finishing material, introduce human living space (being so-called little space) in a large number as paint, coating, adhesive, agrochemical, in addition in the living space, because sulfur-containing compound (as hydrogen sulfide, sulfur dioxide), nitrogen oxide, carbon monoxide that combustion processes such as culinary art, smoking produce.The methyl mercaptan that organic corrupt decomposition and people and pet are discharged with foul odour, ammonia and other protein catabolites make the room air severe contamination, and the incident of causing a disease, causing death even facing a charge in court that causes thus is also of common occurrence.In addition, some removable space (as: passenger train, long-distance bus, steamer, aircraft etc.) and public place (as: hospital, market, waiting room, classroom etc.), because crowd density is higher, it is not smooth to ventilate, pollutant is complicated and become the particularly sudden pernicious pandemics of all kinds of infectious diseases (as SARS, bird flu etc.) cross-infection, the main path that spreads fast.Therefore, air-polluting improvement in the little space, to the prevention and control disease, the spreading and propagation of containment sudden illness, improve the people ' s health level, keeping the sustainable development of national economy, have great economic implications and social benefit, also is an important component part of China's public health anti-epidemic system.Existing is the research of catalysis material with titanium dioxide, is mainly used in the photocatalytic oxidation degradation of organic pollution.Shortage to typical inorganic pollution (as H
2S, SO
2, NH
3, NO
X, CO etc.) give photodissociation and eliminate.
Summary of the invention the purpose of this invention is to provide a kind of nanometer quaternary photocatalyst that is used for the little space of full spectrum elimination air pollutants.It by light-catalyzed reaction, can be eliminated various organic and inorganic pollutant in the little space environment of human lives, work and all kinds of pathogenic microorganisms under the exciting of ultraviolet light effectively.
Another object of the present invention is to provide a kind of preparation method of nanometer quaternary photocatalyst.
The present invention eliminates the nanometer quaternary photocatalyst of air pollution in small spaces thing, is made up of carrier and three kinds of active components, and it is to be that carrier (is selected from the commodity that Degussa company produces, specific surface 〉=50m with the nano titanium oxide
2/ g granularity 20-30nm, the specific surface of nano titanium oxide is 〉=50m
2/ g, granularity is 20-30nm, rutile is 2: 8～3: 7 with the ratio of anatase content); Active component A is a chloroplatinic acid, and the content of platinum is the 0.1-0.6% of nano TiO 2 carrying body weight, preferred 0.2-0.5%.Active component B is selected from a kind of in the oxide of lithium, potassium, magnesium metallic element, promptly is selected from Li
2O, K
2O, a kind of among the MgO, preferred Li
2O; The loading of its metal oxide is the 0.5-2% of nano titanium oxide weight, preferred 0.8-1.2%.A kind of in active component C chosen from Fe, vanadium, the nickel metallic element oxide promptly is selected from Fe
2O
3, V
2O
5, a kind of among the NiO, preferred Fe
2O
3The loading of its metal oxide is the 3-6% of nano titanium oxide weight, preferred 2-5%.
The preparation method of nanometer quaternary photocatalyst of the present invention is as follows, at first carries out the treatment step of carrier: before supporting active component, carrier through 400-700 ℃, was handled 2-4 hour under nitrogen protection; Then at 300-400 ℃, constant temperature 5-10 hour; Preparation process may further comprise the steps:
(1) measures the aqueous solution 0.33-1.90 milliliter that active component A concentration is the chloroplatinic acid of 0.0772M, be dissolved in the deionized water of an amount of 25-45 milliliter, regulator solution pH value is to 4.8-6.2, and preferred pH value is 5.4-6.2, stirs the nano-titanium dioxide powder that slow immersion has down been handled;
(2) led to nitrogen 10-30 minute in the above solution, then under fully stirring, with UV illumination reduction 1-4 hour;
(3) with spreading mass after filtration and with behind the deionized water cyclic washing, under 120-150 ℃ temperature vacuum drying 12-24 hour, obtain Pt/nm-TiO
2Photochemical catalyst;
(4) take by weighing the water-soluble metal salt of active component B, dissolve in an amount of 25-45 milliliter ionized water, immerse the Pt/nm-TiO of preparation in the step (3)
2Photochemical catalyst;
(5) stir 20-30 minute, 70-90 ℃ stir evaporate to dryness after, in the 300-380 ℃ of air roasting 3-5 hour, (3) washing was dry more set by step;
(6) set by step the photochemical catalyst of (5) preparation must be under nitrogen protection, handles 2-5 hour for 400-600 ℃, and the preferred nitrogen treatment temperature is 450-500 ℃, and the processing time is 3-4 hour; 300-500 ℃ constant temperature 2-4 hour, slowly reduce to room temperature; Eliminating internal stress, and form a large amount of oxygen vacancies and activated centre at catalyst surface.
(7) take by weighing mixed the grinding 0.5-1 hour of photochemical catalyst that active component C and step (6) prepare.Catalyst gets product.
Utilize nanometer quaternary photocatalyst of the present invention to carry out light-catalyzed reaction, the principle of eliminating air pollutants in the little space and killing pathogenic bacteria with full spectrum may be interpreted as:
When the light quantum (h γ) of energy more than or equal to nano titanium oxide semiconductor energy gap Eg, after the semiconductor absorption, semi-conductive valence band electronics is excited to conduction band becomes free electron, in valence band, form a free hole simultaneously, this high-octane free charge, transfer to catalyst surface, can will be adsorbed on the molecular oxygen O of catalyst surface
2With minor amount of water H
2O, redox is the O with high oxidability respectively
2 -With
The OH free radical (
The oxygen of OH free radical also current potential is that 2.8eV vs NHE is far above CL
2, H
2O
2, O
3Deng the oxygen of routine disinfection agent current potential also).They will further make the irreversibly oxidative degradation of all kinds of organic and inorganic contaminant molecule (or reduction) that is adsorbed on catalyst surface be harmless product at the privileged site (active sites) of catalyst, this high energy oxidizer and electronics-hole are to direct attack cell membrane also, make nucleus protein divide desetting, reach antibacterial, sterilization purpose.
Platinum component among the present invention is being born the trapping centre of light induced electron and the double action of contaminant molecule adsorption site, and alkaline components then can be regulated the acid-base value of catalyst surface, helps quickening the mineral acid molecule (as H
2S, SO
2, CO etc.) adsorption rate, the iron component is owing to have a special character (Fe that appraises at the current rate
2+/3+) play a part electronics relaying thing, and can widen spectral response, improve the utilization ratio of light source.
Nanometer quaternary photocatalyst of the present invention is with short wave ultraviolet light (λ＜300nm) as excitation source.
The present invention compared with prior art has outstanding feature and progress:
1. existing is the research of catalysis material with titanium dioxide, is mainly used in the photocatalytic oxidation degradation of organic pollution, the quaternary photocatalyst that the present invention narrated, and outside the removal organic polluter, also can be to typical inorganic pollution (as H
2S, SO
2, NH
3, NO
X, CO etc.) give photodissociation and eliminate.
2. the present invention adopts alkaline components, regulates the acid-base value of catalyst surface, has improved the adsorption capacity of acid contaminant.
3. the present invention as electronics relaying thing, has improved electric charge transfer velocity and optical energy utilization efficiency with the iron component.
4. the present invention adopts in the blanket of nitrogen, under the specified temp catalyst is handled, and makes the oxygen vacancy and the electron-donating center of catalyst surface formation high concentration, has effectively improved the catalytic activity of catalyst.
The present invention can be converted into harmless product with all kinds of organic and inorganic pollutant in sealing or the semiclosed little space by light-catalyzed reaction, also can effectively kill all kinds of pathogenic microorganisms.As: the eliminations of being degraded such as formaldehyde, benzene series thing, hydrogen sulfide, ammonia, carbon monoxide, oxynitrides, and can effectively kill all kinds of pathogenic microorganisms and variation bacterium.
Specific embodiment the following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Embodiment 1
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 450 ℃ of roastings 3 hours, then at 350 ℃, constant temperature 8 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 0.8ml, adds in the 30ml deionized water regulator solution pH value to 5, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 10 minutes with nitrogen, under fully stirring, with UV illumination reductase 12 hour, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 12 hours under 100 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Take by weighing 156 milligrams of B active component MgO and dissolve in 32 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, electromagnetic agitation 20 minutes, behind 80 ℃ of stirring evaporates to dryness, roasting is 3 hours in 350 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 2 hours for 450 ℃, and 350 ℃ of constant temperature 2 hours is slowly reduced to room temperature.
Take by weighing 150 milligrams of C active component V
2O
5After photochemical catalyst 2 evenly mixes, ground 0.5 hour, promptly make finished catalyst.
Get 5 gram finished catalysts, evenly be coated in 750cm
2Porous inert carrier on, at the uviol lamp of 12W (under the irradiation of λ=253.7nm), at 24M
3Enclosure space in, circular response 1 hour, can make initial concentration is 1.0mg/m
3H
2S degraded 86%, making concentration is 1.2mg/m
3Degradation Formaldehyde 82%.
Embodiment 2
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 400 ℃ of roastings 2 hours, then at 300 ℃, constant temperature 10 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 0.33ml, adds in the 25ml deionized water regulator solution pH value to 6, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 30 minutes with nitrogen, under fully stirring, with UV illumination reduction 3 hours, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 15 hours under 120 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Take by weighing 312 milligrams of B active component MgO and dissolve in 25 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, electromagnetic agitation 30 minutes, behind 70 ℃ of stirring evaporates to dryness, roasting is 4 hours in 400 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 3 hours for 400 ℃, and 300 ℃ of constant temperature 3 hours is slowly reduced to room temperature.
Take by weighing 150 milligrams of C active component V
2O
5After photochemical catalyst 2 evenly mixes, ground 1 hour, promptly make finished catalyst.
Degradation rate to hydrogen sulfide is 90% under the same conditions, and the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 84%.
Embodiment 3
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 700 ℃ of roastings 4 hours, then at 400 ℃, constant temperature 5 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 1.9ml, adds in the 45ml deionized water regulator solution pH value to 4.8, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 20 minutes with nitrogen, under fully stirring, with UV illumination reduction 1 hour, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 24 hours under 150 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Claim 240 milligrams of B active component K
2O dissolves in 45 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, and electromagnetic agitation 25 minutes, behind 90 ℃ of stirring evaporates to dryness, roasting is 3.5 hours in 300 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 5 hours for 600 ℃, and 500 ℃ of constant temperature 4 hours is slowly reduced to room temperature.
Take by weighing 150 milligrams of C active component V
2O
5After photochemical catalyst 2 evenly mixes, ground 1 hour, promptly make finished catalyst, the degradation rate to hydrogen sulfide is 92% under the same conditions, the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 85%.
Embodiment 4
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 500 ℃ of roastings 4 hours, then at 400 ℃, constant temperature 6 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 0.7ml, adds in the 35ml deionized water regulator solution pH value to 6.2, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 15 minutes with nitrogen, under fully stirring, with UV illumination reduction 4 hours, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 18 hours under 110 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Claim 126 milligrams of B active component Li
2O dissolves in 28 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, and electromagnetic agitation 23 minutes, behind 75 ℃ of stirring evaporates to dryness, roasting is 4.5 hours in 320 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 4 hours for 500 ℃, and 400 ℃ of constant temperature 4 hours is slowly reduced to room temperature.
Take by weighing 150 milligrams of C active component V
2O
5After photochemical catalyst 2 evenly mixes, ground 1 hour, promptly make finished catalyst, the degradation rate to hydrogen sulfide is 94% under the same conditions, the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 86%.
Embodiment 5
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 600 ℃ of roastings 4 hours, then at 400 ℃, constant temperature 7 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 1.1ml, adds in the 40ml deionized water regulator solution pH value to 6, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 25 minutes with nitrogen, under fully stirring, with UV illumination reduction 4 hours, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 21 hours under 130 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Claim 126 milligrams of B active component Li
2O dissolves in 35 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, and electromagnetic agitation 28 minutes, behind 85 ℃ of stirring evaporates to dryness, roasting is 4.5 hours in 370 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 4 hours for 550 ℃, and 450 ℃ of constant temperature 4 hours is slowly reduced to room temperature.
The NiO that takes by weighing 100 milligrams of C active components ground 1 hour with after photochemical catalyst 2 evenly mixes, and promptly made finished catalyst, had that the degradation rate to hydrogen sulfide is 96% under the same terms, and the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 86%.
Embodiment 6
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 550 ℃ of roastings 4 hours, then at 400 ℃, constant temperature 9 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 5ml, adds in the 40ml deionized water regulator solution pH value to 6, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 25 minutes with nitrogen, under fully stirring, with UV illumination reduction 4 hours, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 17 hours under 130 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Claim 126 milligrams of B active component Li
2O dissolves in 38 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, and electromagnetic agitation 28 minutes, behind 85 ℃ of stirring evaporates to dryness, roasting is 4.5 hours in 370 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 4 hours for 550 ℃, and 450 ℃ of constant temperature 4 hours is slowly reduced to room temperature.
Take by weighing the Fe of 250 milligrams of C active components
2O
3After photochemical catalyst 2 evenly mixes, ground 1 hour, promptly make finished catalyst, the degradation rate to hydrogen sulfide is 98% under the same conditions, the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 89.5%.
Embodiment 7
Take by weighing 5g nano-titanium dioxide powder (being selected from Degussa company reagent), place tube furnace, under nitrogen protection, 650 ℃ of roastings 4 hours, then at 400 ℃, constant temperature 9 hours.
Measuring concentration is 0.0772M chloroplatinic acid aqueous solution 1.7ml, adds in the 40ml deionized water, and regulator solution pH value is to 5.4-5.8, stir the nano-titanium dioxide powder that slow immersion has down been handled, after slurries purge 25 minutes with nitrogen, under fully stirring, with UV illumination reduction 4 hours, filter then, wash and remove residual chlorion, at last, filter and in vacuum drying chamber, vacuum drying is 22 hours under 130 ℃ the temperature, pulverize porphyrize, promptly make Pt/nm-TiO
2Photochemical catalyst 1.
Claim 126 milligrams of B active component Li
2O dissolves in 41 ml deionized water, the photochemical catalyst 1 that makes more than the immersion, and electromagnetic agitation 28 minutes, behind 85 ℃ of stirring evaporates to dryness, roasting is 4.5 hours in 370 ℃ of air, gets photochemical catalyst 2.
The photochemical catalyst 2 of preparation again under nitrogen protection, was handled 4 hours for 550 ℃, and 450 ℃ of constant temperature 4 hours is slowly reduced to room temperature.
Take by weighing the Fe of 300 milligrams of C active components
2O
3After photochemical catalyst 2 evenly mixes, ground 1 hour, promptly make finished catalyst, the degradation rate to hydrogen sulfide is 99% under the same conditions, the degradation rate of PARA FORMALDEHYDE PRILLS(91,95) is 92%.
Claims (9)
1, a kind of nanometer quaternary photocatalyst of eliminating the air pollution in small spaces thing is characterized in that: it is made up of carrier and three kinds of active components, and it is to be carrier with the nano titanium oxide, and the specific surface of nano titanium oxide is 〉=50m
2/ g, granularity is 20-30nm, rutile is 2: 8～3: 7 with the ratio of anatase content; Active component A is a chloroplatinic acid, and the content of platinum is the 0.1-0.6% of nano TiO 2 carrying body weight; Active component B is selected from a kind of in the oxide of lithium, potassium, magnesium metallic element, and the loading of its metal oxide is the 0.5-2% of nano titanium oxide weight; A kind of in active component C chosen from Fe, vanadium, the nickel metallic element oxide, the loading of its metal oxide is the 2-6% of nano titanium oxide weight.
2, the nanometer quaternary photocatalyst of elimination air pollution in small spaces thing according to claim 1, it is characterized in that: the content of platinum is the 0.2-0.5% of nano TiO 2 carrying body weight, the loading of active component B is the 0.8-1.2% of nano titanium oxide weight, and the loading of active component C is the 3-5% of nano titanium oxide weight.
3, the nanometer quaternary photocatalyst of elimination air pollution in small spaces thing according to claim 1 and 2, it is characterized in that: active component B is selected from Li
2O, K
2O, a kind of among the MgO.
4, the nanometer quaternary photocatalyst of elimination air pollution in small spaces thing according to claim 3 is characterized in that: active component B is Li
2O.
5, the nanometer quaternary photocatalyst of elimination air pollution in small spaces thing according to claim 1 and 2, it is characterized in that: active component C is selected from Fe
2O
3, V
2O
5, a kind of among the NiO.
6, the nanometer quaternary photocatalyst of elimination air pollution in small spaces thing according to claim 5 is characterized in that: active component C is Fe
2O
3
7, the preparation method of claim 4 or 6 described nanometer quaternary photocatalysts is characterized in that: the treatment step that at first carries out carrier: before supporting active component, carrier through 400-700 ℃, was handled 2-4 hour under nitrogen protection; Then at 300-400 ℃, constant temperature 5-10 hour; Preparation process may further comprise the steps:
(1) measure the aqueous solution 0.33-1.90 milliliter that active component A concentration is the chloroplatinic acid of 0.0772M, be dissolved in the deionized water of 25-45 milliliter, regulator solution pH value stirs the nano-titanium dioxide powder that slow immersion has down been handled to 4.8-6.2;
(2) led to nitrogen 10-30 minute in the above solution, then under fully stirring, with UV illumination reduction 1-4 hour;
(3) with spreading mass after filtration and with behind the deionized water cyclic washing, under 100-150 ℃ temperature vacuum drying 12-24 hour, obtain Pt/nm-TiO
2Photochemical catalyst;
(4) take by weighing the water-soluble metal salt of active component B, in the 25-45 milliliter ionized water that dissolves in, immerse the Pt/nm-TiO of preparation in the step (3)
2Photochemical catalyst;
(5) stir 20-30 minute, 70-90 ℃ stir evaporate to dryness after, in the 300-400 ℃ of air roasting 3-5 hour;
(6) set by step the photochemical catalyst of (5) preparation under nitrogen protection, was handled 2-5 hour for 400-600 ℃, 300-500 ℃ constant temperature 2-4 hour, slowly reduce to room temperature;
(7) take by weighing mixed the grinding 0.5-1 hour of photochemical catalyst that active component C and step (6) prepare, catalyst gets product.
8, the preparation method of nanometer quaternary photocatalyst according to claim 7 is characterized in that: the pH value of active component A maceration extract is 5.4-6.2.
9, the preparation method of nanometer quaternary photocatalyst according to claim 7 is characterized in that: the nitrogen treatment temperature is 450-500 ℃ in preparation process step (6), and the processing time is 3-4 hour.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080526A (en) * | 2014-12-30 | 2015-11-25 | 云南大学 | Method for preparing titanium dioxide-diatom ooze composite material for indoor photocatalytic degradation of formaldehyde by biological template |
| CN105603714A (en) * | 2016-01-23 | 2016-05-25 | 武汉理工大学 | Preparation method for titanium dioxide-based silver-magnesium oxide-titanium dioxide composite nanofiber mat |
| CN116672901A (en) * | 2023-08-04 | 2023-09-01 | 西安金沃泰环保科技有限公司 | Nanofiltration material for acid-containing waste gas and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001246264A (en) * | 2000-03-08 | 2001-09-11 | Mitsubishi Heavy Ind Ltd | Photocatalyst |
| CN1290573A (en) * | 2000-10-04 | 2001-04-11 | 中国科学院兰州化学物理研究所 | Light catalyst for purifying air |
| JP2002320862A (en) * | 2001-04-26 | 2002-11-05 | Asahi Kasei Corp | Photocatalyst thin film in which metal is supported on titanium oxide thin film |
| CN1666815A (en) * | 2004-03-11 | 2005-09-14 | 曾庆琳 | Anatase type nanometer titanium dioxide with photcatalytst disinfecting ability |
| CN100342963C (en) * | 2005-01-07 | 2007-10-17 | 中南大学 | Method for preparing composite photocatalysis material of titanium dioxide |
-
2007
- 2007-03-28 CN CNB2007100176070A patent/CN100446853C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080526A (en) * | 2014-12-30 | 2015-11-25 | 云南大学 | Method for preparing titanium dioxide-diatom ooze composite material for indoor photocatalytic degradation of formaldehyde by biological template |
| CN105080526B (en) * | 2014-12-30 | 2018-08-31 | 云南大学 | A kind of titanium dioxide-diatom ooze composite process of indoor formaldehyde degradation by photocatalytic oxidation process prepared by biological template |
| CN105603714A (en) * | 2016-01-23 | 2016-05-25 | 武汉理工大学 | Preparation method for titanium dioxide-based silver-magnesium oxide-titanium dioxide composite nanofiber mat |
| CN116672901A (en) * | 2023-08-04 | 2023-09-01 | 西安金沃泰环保科技有限公司 | Nanofiltration material for acid-containing waste gas and preparation method thereof |
| CN116672901B (en) * | 2023-08-04 | 2023-10-27 | 西安金沃泰环保科技有限公司 | Nanofiltration material for acid-containing waste gas and preparation method thereof |
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| CN100446853C (en) | 2008-12-31 |
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