CN1552456A - Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature - Google Patents
Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature Download PDFInfo
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- CN1552456A CN1552456A CNA031361730A CN03136173A CN1552456A CN 1552456 A CN1552456 A CN 1552456A CN A031361730 A CNA031361730 A CN A031361730A CN 03136173 A CN03136173 A CN 03136173A CN 1552456 A CN1552456 A CN 1552456A
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Abstract
An oxidative catalyst and its disinfecting method by catalyzing the O2 in air to disinfect and clean the indoor air at ordinary temp are disclosed. Said catalyst is composed of the porous inorganic carrier and the active components chosen from Pt, Au, Ag, Pd, Cu, Fe, Ti, Zr, Sn, W, Mo and Ce, and can play its role to kill virus, bacteria and fungus and remote volatile organic substances and CO from air by oxidization.
Description
Technical field
The invention belongs to the environmental catalysis technical field, the oxygen that relates in the catalytic air is killed the microorganism that is adsorbed on catalyst surface, organic and the inorganic pollution of volatility in the air is removed in simultaneous oxidation, and the purpose that at room temperature reaches disinfecting air and purify air improves IAQ (indoor air quality).
Technical background
Since China's severe acute respiratory syndrome epidemic situation, indoor and pollution and virus disseminating ventilating system are subjected to unprecedented attention.The hospital of accepting the SARS sufferer for medical treatment mainly is that central air-conditioning is used in ventilation, drug disinfection and restriction to the measure of room air health.Yet problem is, uses disinfectant to cause harmful effect to human body and ecological environment in a large number, and the air-conditioning of also having to use in the torridity summer.
Even outside the hospital, the problem of room air pollution is also quite serious.Modern building also more and more tends to use airtight relatively air conditioning system, modern's time is also more and more tended at indoor spending (about 90%), they are exposed in the various indoor air pollutants, for example volatile organic matter, carbon monoxide and microorganism.Particularly contaminated central air conditioner system can become the breeding ground of antibacterial, mycete and virus, and forced ventilation can spread microorganism in whole building.
Indoor microorganism and harmful chemical can cause the people does not variously accommodate serious disease, is referred to as " polluting the building syndrome ", and famous legionnaires disease is exactly an example of wherein having decided on a verdict.
In view of chemical disinfection can be brought serious ecological environment problem, photocatalysis oxidation technique is used for purifying and the sterilization room air by motion at present.Semi-conducting material particularly, being found as titanium dioxide can be at degradation of organic substances under the ultraviolet irradiation and killing bacteria.But the subject matter in the application is that as indoor air purification and sterilizing equipment decontaminating apparatus, system too complexity causes the cost costliness, as patent 96197457.5 and 98240831.5.Even more serious is that ultraviolet use can also cause the ionization of air except causing system complex, cause new air pollution.In addition, ultraviolet leaking accidentally can cause human body directly to injure.
Summary of the invention
The present invention is directed to the problems referred to above, provide a kind of ultraviolet source that do not need, be issued to killing microorganisms and the purpose that purifies air in environmental protection and energy-conservation prerequisite also without any need for the air autoxidation catalyst and the using method of the energy.
The principles of science of the present invention is summarized as follows.The result of study of modern Surface Science shows, can be dissociated into oxygen atom or the charged peroxide or the superoxide radical of adsorbed state when oxygen is adsorbed on many transition metal and some precious metal surfaces under the room temperature.For example at room temperature on the surface of platinum, oxygen molecule extremely tends to be dissociated into oxygen atom absorption, could find the adsorb oxygen of molecularity when only being lower than-100 ℃ on the surface of platinum.The formation that is accompanied by these adsorbing species also always has the chemisorbed delivery in hot weather to give birth to, from the silver of 80kJ/mol to almost up to the tungsten of 800kJ/mol.We have found a kind of metallic catalyst of loaded nano yardstick high degree of dispersion in recent research, carbon monoxide and organic pollution during at room temperature efficient oxidation purifies air.These scientific discoveries have hinted a kind of like this probability consumingly, promptly utilize airborne oxygen and specific metallic catalyst surface platform, might reach with chemosterilant commonly used such as peracetic acid similarly to the oxidation sterilizing effect of virus and antibacterial.Can only break away from catalyst surface with the form of normal oxygen molecule owing to result from the highly active oxygen atom and the free radical of catalyst surface, so the sterilization of this catalytic air oxidation brings any side effect can for human body and environment.
Catalyst of the present invention is made of one or more metal components that load among platinum on the porous inorganic thing carrier, gold, silver, palladium, copper, ferrum, titanium, zirconium, stannum, tungsten, molybdenum, the ce metal group.The load capacity of each metal component is respectively 0.1-50% (metallic element weight scaled value).Porous inorganic thing carrier can be aluminium sesquioxide, cerium oxide, ferrum oxide, silicon dioxide, zeolite, meerschaum, titanium dioxide, zirconium dioxide, zinc oxide, magnesium oxide, tin ash one or more hopcalites wherein, or its composite oxides, comprise phosphorus heteropoly tungstic acid, silicotungstic heteropolyacid, bora polyacid, germanium heteropoly tungstic acid, cobalt heteropoly tungstic acid.Aforesaid porous inorganic thing carrier should have 10 meters squared per gram or bigger specific surface area, is preferably 30 meters squared per gram or bigger specific surface area.
Multiple metal component can be simultaneously or is loaded on the same porous inorganic thing carrier with any sequencing and to constitute catalyst, also can load on respectively on the different porous inorganic thing carriers to constitute catalyst by mixing.The load of metal component on porous inorganic thing carrier can be infusion process, coprecipitation, sol-gel process, complexometry and ion exchange, or above method unite use.Loading on metal component on the porous inorganic oxide carrier has the particle diameter of average 5-500 nanometer, is preferably average 10-50 nanometer.The aforementioned metal component can be the form of the oxide of this metal or this metal and any inorganic salt and do not change its effect.
Catalyst of the present invention can become Any shape according to different instructions for use preprocess, for example, can be coated on central air-conditioning, building ventilation filtration system or the independent Air Conditioning filter medium, or be coated on indoor wall, screen window, mask and the protective garment and use, can carry out air sterillization automatically, not need heating and illumination.The present invention need to be specially adapted to closed circulation and needs to reduce abnormal flavour and the filtration system that prevents microbial growth, can make microorganism be adsorbed on catalyst surface and oxidized deactivation and decomposition by air circulation, airborne volatile organic matter and carbon monoxide are removed in oxidation constantly simultaneously, reach the purpose of air sterillization and clean China.The present invention can be applied to buildings in general, also can be used for hospital, comprises the SRAS ward and the aseptic condition of air is required very strict operating room.
Catalyst of the present invention is compared with prior art with using method, has following advantage:
(1) catalyst of the present invention to be to use cheap metal, do not use or uses the noble metal of seldom measuring high degree of dispersion, and preparation technology is simple, and is cheap for manufacturing cost.
(2) catalyst of the present invention can utilize the contact catalysis oxidation with air, sterilizes automatically and purifies air, and does not need ultraviolet source and thermal source, and equipment is simple, and operating cost is cheap.
(3) catalyst of the present invention can not constitute any injury to human body and ecological environment in to air sterillization and purification process.
In order to be illustrated more clearly in the present invention, enumerate following examples, but it there is not any restriction to scope of the present invention.
Embodiment 1
Get 100 gram γ-aluminium sesquioxide powder be soaked in decide to stir 1 hour, after 90 ℃ of dried overnight in the mixed aqueous solution of cerous nitrate, ferric nitrate and chloroplatinic acid of concentration, interim ground is warming up to 500 ℃ from 100 ℃ in air, kept 3 hours, and reduced to room temperature, promptly obtain embodiment 1 catalyst.The platinum component load capacity of manufactured goods catalyst is 0.1% (metallic element weight scaled value), and ferrum component load capacity is 15.0% (metallic element weight scaled value), and cerium component load capacity is 5% (metallic element weight scaled value).
Embodiment 2
0.5 gram embodiment 1 catalyst is positioned in the tubular fixed-bed reactor reacts, experiment condition is as follows:
Volume is formed: nitrogen: 78%, and oxygen: 20%, steam: 1%, carbon monoxide: 1%, reaction velocity (GHSV) is 10,000/ hours.At 25 ℃, carbon monoxide is 30% to the conversion ratio of carbon dioxide.At 30 ℃, carbon monoxide is 45% to the conversion ratio of carbon dioxide.At 35 ℃, carbon monoxide is 55% to the conversion ratio of carbon dioxide.
Embodiment 3
0.5 gram embodiment 1 catalyst is positioned in the tubular fixed-bed reactor reacts, experiment condition is as follows:
Volume is formed: nitrogen: 78%, and oxygen: 20%, steam: 1%, formaldehyde: 50ppm, reaction velocity (GHSV) is 10,000/ hours.At 25 ℃, formaldehyde is 15% to the conversion ratio of carbon dioxide.At 30 ℃, formaldehyde is 20% to the conversion ratio of carbon dioxide.At 35 ℃, formaldehyde is 30% to the conversion ratio of carbon dioxide.
Embodiment 4
0.2 gram embodiment 1 catalyst is depressed to the disk of 1 centimetre of diameter at 20 atmospheric pressure, in 25 ℃ of following atmosphere of room temperature, with yeast suspension (Debaryomyces polymorphus, 10
8, 20 μ l) and drop in catalyst surface.Culture experiment result shows that 5 minutes germicidal efficiency surpasses 99.8%.Control experiment shows that filter paper and alumina carrier do not have bactericidal effect under the similarity condition.
Embodiment 5
0.2 gram embodiment 1 catalyst is depressed to the disk of 1 centimetre of diameter at 20 atmospheric pressure, in 25 ℃ of following atmosphere of room temperature, with escherichia coli suspension ((DH5 α, Amp
+, 10
8, 20 μ l) and drop in catalyst surface.Culture experiment result shows that 5 minutes germicidal efficiency reaches 100%.Control experiment shows that filter paper and alumina carrier do not have bactericidal effect under the similarity condition.
Embodiment 6
0.2 gram embodiment 1 catalyst is depressed to the disk of 1 centimetre of diameter at 20 atmospheric pressure, in 25 ℃ of following atmosphere of room temperature, with SARS virus (TCID
50, 106,100 μ l) and drop to catalyst surface, collected viral liquid in 5 minutes, inoculation Vero cell found that no obvious viral infection and growth.Control experiment shows that filter paper matched group virus infectivity does not fall as follows under the similarity condition.
Claims (7)
1. one kind with catalyst and the sterilization method of oxygen in the air as oxidative disinfectant, it is characterized in that this catalyst can adsorb at ambient temperature and microorganisms such as airborne virus, antibacterial and mycete are killed in oxidation, airborne volatile organic matter and carbon monoxide are removed in simultaneous oxidation, and do not need heating and illumination.
2. the described catalyst of claim 1 as described above is characterized in that, is made of one or more metal components that load among platinum on the porous inorganic thing carrier, gold, silver, palladium, copper, ferrum, titanium, zirconium, stannum, tungsten, molybdenum, the ce metal group.
3. the described catalyst of claim 1 as described above, it is characterized in that, the described multiple metal component of claim 2 can be simultaneously or is loaded on the same porous inorganic thing carrier with any sequencing and to constitute catalyst, also can load on respectively on the different porous inorganic thing carriers to constitute catalyst by mixing.
4. the described catalyst of claim 1 as described above is characterized in that the load capacity of each metal component on the described porous inorganic thing of claim 2 carrier is respectively 0.1-50% (metallic element weight scaled value).
5. the described catalyst of claim 1 as described above, it is characterized in that, the described porous inorganic thing of claim 2 carrier can be aluminium sesquioxide, cerium oxide, ferrum oxide, silicon dioxide, zeolite, meerschaum, titanium dioxide, zirconium dioxide, zinc oxide, magnesium oxide, tin ash one or more hopcalites wherein, or its composite oxides, comprise phosphorus heteropoly tungstic acid, silicotungstic heteropolyacid, bora polyacid, germanium heteropoly tungstic acid, cobalt heteropoly tungstic acid.Aforesaid porous inorganic thing carrier should have 10 meters squared per gram or bigger specific surface area.
6. the described method for preparing catalyst of claim 3 as described above, it is characterized in that the load of metal component on the described porous inorganic thing of claim 2 carrier can be infusion process, coprecipitation, sol-gel process, complexometry and ion exchange, or above method unite use.Loading on metal component on the porous inorganic oxide carrier has the particle diameter of average 5-500 nanometer, is preferably average 10-50 nanometer.
7. the described sterilization method of claim 1 as described above is characterized in that the catalyst of being developed can become Any shape according to different instructions for use preprocess, and being placed on the good place of room ventilation can carry out air sterillization automatically, does not need heating and illumination.For example, can be coated on central air-conditioning, building ventilation filtration system or the independent Air Conditioning filter medium, or be coated on indoor wall, screen window, mask and the protective garment and use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03136173 CN1226051C (en) | 2003-06-02 | 2003-06-02 | Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03136173 CN1226051C (en) | 2003-06-02 | 2003-06-02 | Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature |
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| CN1552456A true CN1552456A (en) | 2004-12-08 |
| CN1226051C CN1226051C (en) | 2005-11-09 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100551523C (en) * | 2005-10-28 | 2009-10-21 | 厦门大学 | A kind of metal oxide supported Nobel-metal catalyst preparation method |
| CN1795970B (en) * | 2004-12-28 | 2011-04-13 | 中国科学院生态环境研究中心 | High performance catalyst for catalyzing formaldehyde to complete oxidation under room temperature temperature |
| CN102389810A (en) * | 2011-09-28 | 2012-03-28 | 海尔集团公司 | Formaldehyde oxidation catalyst |
| CN102705914A (en) * | 2012-06-29 | 2012-10-03 | 江苏瑞丰科技实业有限公司 | PM (Particulate Matter) 2.5 and air pollutant purification treating method of ventilating system |
| CN105642333A (en) * | 2015-11-03 | 2016-06-08 | 中山大学 | Multifunctional environment purification composite material, and preparation method and application thereof |
| CN108786742A (en) * | 2018-06-27 | 2018-11-13 | 杨秋林 | A kind of rare earth compound air purification material and preparation method thereof |
| CN111107747A (en) * | 2018-08-29 | 2020-05-05 | 株式会社日吉 | Disinfectant for legionella bacteria, water treatment method, additive for bath water and additive for air-conditioning cooling tower water |
| CN111330628A (en) * | 2020-04-08 | 2020-06-26 | 吉林建筑大学 | Multi-element co-doped nano titanium dioxide photocatalytic material |
| CN112815413A (en) * | 2021-01-11 | 2021-05-18 | 北京华钛高科科技有限公司 | Air conditioner air duct sterilization and disinfection module |
| CN112871129A (en) * | 2020-04-21 | 2021-06-01 | 中国科学院大连化学物理研究所 | Preparation method and application of macroporous functional material for adsorbing inactivated virus |
| CN115254139A (en) * | 2022-08-23 | 2022-11-01 | 中国科学院生态环境研究中心 | Transition metal modified Ag/Al 2 O 3 Catalyst, preparation method and application thereof |
-
2003
- 2003-06-02 CN CN 03136173 patent/CN1226051C/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1795970B (en) * | 2004-12-28 | 2011-04-13 | 中国科学院生态环境研究中心 | High performance catalyst for catalyzing formaldehyde to complete oxidation under room temperature temperature |
| CN100551523C (en) * | 2005-10-28 | 2009-10-21 | 厦门大学 | A kind of metal oxide supported Nobel-metal catalyst preparation method |
| CN102389810A (en) * | 2011-09-28 | 2012-03-28 | 海尔集团公司 | Formaldehyde oxidation catalyst |
| CN102705914A (en) * | 2012-06-29 | 2012-10-03 | 江苏瑞丰科技实业有限公司 | PM (Particulate Matter) 2.5 and air pollutant purification treating method of ventilating system |
| CN105642333B (en) * | 2015-11-03 | 2019-04-02 | 中山大学 | A kind of Multifunctional environment purification composite material and preparation method and application |
| CN105642333A (en) * | 2015-11-03 | 2016-06-08 | 中山大学 | Multifunctional environment purification composite material, and preparation method and application thereof |
| CN108786742A (en) * | 2018-06-27 | 2018-11-13 | 杨秋林 | A kind of rare earth compound air purification material and preparation method thereof |
| CN111107747A (en) * | 2018-08-29 | 2020-05-05 | 株式会社日吉 | Disinfectant for legionella bacteria, water treatment method, additive for bath water and additive for air-conditioning cooling tower water |
| CN111330628A (en) * | 2020-04-08 | 2020-06-26 | 吉林建筑大学 | Multi-element co-doped nano titanium dioxide photocatalytic material |
| CN112871129A (en) * | 2020-04-21 | 2021-06-01 | 中国科学院大连化学物理研究所 | Preparation method and application of macroporous functional material for adsorbing inactivated virus |
| CN112815413A (en) * | 2021-01-11 | 2021-05-18 | 北京华钛高科科技有限公司 | Air conditioner air duct sterilization and disinfection module |
| CN112815413B (en) * | 2021-01-11 | 2022-06-21 | 北京华钛高科科技有限公司 | Air conditioner air duct sterilization and disinfection module |
| CN115254139A (en) * | 2022-08-23 | 2022-11-01 | 中国科学院生态环境研究中心 | Transition metal modified Ag/Al 2 O 3 Catalyst, preparation method and application thereof |
| CN115254139B (en) * | 2022-08-23 | 2023-11-21 | 中国科学院生态环境研究中心 | Transition metal modified Ag/Al 2 O 3 Catalyst, preparation method and application thereof |
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| CN1226051C (en) | 2005-11-09 |
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Granted publication date: 20051109 |