CN105126797A - Honeycomb ceramic-supported nano titanium dioxide photo-catalyst and preparation method of same - Google Patents
Honeycomb ceramic-supported nano titanium dioxide photo-catalyst and preparation method of same Download PDFInfo
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Abstract
A honeycomb ceramic-supported nano titanium dioxide photo-catalyst is characterized by being prepared from a honeycomb ceramic catalyst supporter and nano titanium dioxide in a supported manner. The pore size of the honeycomb ceramic is 2-50 nm and support ratio of the nano titanium dioxide accounts for 8-15% by mass of the honeycomb ceramic. The honeycomb ceramic is one selected from cordierite, mullite or aluminum titanate. The preparation method includes the steps of performing acidic pre-treatment to the honeycomb ceramic, impregnating the honeycomb ceramic in titanium dioxide sol, and then calcining the honeycomb ceramic to prepare the honeycomb ceramic-supported nano titanium dioxide photo-catalyst. The photo-catalyst is prepared by supporting the nano titanium dioxide onto the honeycomb ceramic catalyst supporter in a sol manner. The photo-catalyst is firmly supported and is not liable to fall-off. Because that the honeycomb ceramic is porous and is large in specific surface area, so that the catalyst is increased in specific surface area in unit volume, thereby greatly increasing the contact time of gas to the catalyst, increasing photo quantum efficiency and increasing waste gas purifying efficiency.
Description
Technical field
The present invention relates to solid-carried catalyst field, particularly relate to immobilized photochemical catalyst field, be specifically related to a kind of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst and preparation method thereof.
Background technology
Along with the expanding day of human production activity's scope, cause having occurred that more and more serious problem of environmental pollution, particularly volatile organic matter are very serious to the pollution of atmospheric environment, receive the extensive concern of increasing people in recent years.These volatile organic matter great majority are poisonous to human body, and part can also bring out various serious disease, has carcinogenic or teratogenesis, can also destroy atmospheric ozone layer with the nitrogen oxide generation photochemical reaction in air simultaneously.Therefore, the improvement of volatile organic matter become in recent years so that from now on decades atmospheric environment scientific worker research emphasis.
In recent years, photocatalysis oxidation technique is subject to people as a kind of novel high-level oxidation technology and pays close attention to widely.Compared with traditional biology, chemical treatment method, it has simple to operate, mild condition and low energy consumption, does not produce the outstanding features such as secondary pollution, in the improvement of environmental improvement particularly volatile organic matter, have tempting development prospect.But this technology at present difficult problem still existed in some practical applications needs to be solved further.First, light source utilization rate is low reclaims difficulty with photochemical catalyst.The photochemical catalyst great majority that photocatalysis oxidation technique uses in the processing procedure of organic pollution are powder, this may cause the waste of catalyst in atmospheric treatment process, and in course of reaction, a small amount of photochemical catalyst on surface is only had to absorb ultraviolet light and play the effect of photochemical catalyst, thus cause photo-quantum efficiency lower, in simultaneous reactions process, Powdered photochemical catalyst easily runs off, be unfavorable for the recycling of photochemical catalyst, bring certain difficulty to practical application degraded gas phase organic matter.Secondly, the impact that the mutually light-catalysed efficiency of gas-solid is easily subject to real atmosphere environmental factor is larger.The impacts such as the concentration of the concentration level of the contaminated thing of photocatalysis technology, relative humidity, oxygen are comparatively large, and particularly in commercial Application, environmental applications condition is more complicated, often causes photocatalysis efficiency lower.Finally, photochemical catalyst long period of activity less stable.Photocatalyst surface easily deposits the intermediate being difficult to degrade in photocatalysis to degrade organic matter process, thus cut off the contact of catalyst and ultraviolet light, photochemical catalyst catalytic activity is caused to decline, and can not in-situ regeneration, this affects the commercial Application of photocatalysis oxidation technique greatly.Therefore, developing a kind of stable, immobilization photochemical catalyst and application of carrying out its oxidation technology is efficiently the difficult point of correlative technology field.The advantages such as ceramic honey comb has multiple hole due to it, and specific area is large, effectively can solve the shortcoming of photochemical catalyst.
Summary of the invention
Object of the present invention, for providing a kind of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst and preparation method thereof, overcomes the low and photochemical catalyst of photochemical catalyst light source utilization rate in prior art and reclaims the shortcomings such as difficulty.
Technical scheme of the present invention is a kind of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, it is characterized in that: this catalyst is formed by the carrier for ceramic honeycomb catalyst of porous honeycomb and nano titanium oxide load, wherein the aperture of ceramic honey comb is 2 ~ 50nm, and nano titanium oxide load percentage is 8 ~ 15% of ceramic honey comb mass ratio.
Further, described ceramic honey comb is the one of cordierite, mullite or aluminium titanates.
A preparation method for Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, is characterized in that comprising the following steps:
(1) ceramic honey comb pretreatment: ceramic honey comb is cut into 1cm
3sample, the ceramic honey comb sample of well cutting is put into acid solution boil, boiling time is 1 hour, then by the honeycomb ceramic filter of acid solution process, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: ceramic honey comb step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 5 ~ 10 hours, flood rear taking-up ceramic honey comb, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 ~ 2 hour, is cooled to room temperature and obtains Supported Honeycomb Ceramics nano titanium dioxide photocatalyst after having calcined.
A purposes for Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, is characterized in that: it is applied to the photocatalysis treatment of waste gas.
Beneficial effect of the present invention is: the present invention utilize sol method by nano titanium oxide load honeycomb ceramic carrier on, catalyst cupport is firm, difficult drop-off; Due to multiple hole, the bigger serface of ceramic honey comb, the surface area of unit volume inner catalyst is increased, considerably increases the time of gas and catalyst exposure, improve photo-quantum efficiency, exhaust purification efficiency is improved.
Detailed description of the invention
By the following examples the present invention is specifically described.
A kind of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, it is characterized in that: this catalyst is formed by the carrier for ceramic honeycomb catalyst of porous honeycomb and nano titanium oxide load, wherein the aperture of ceramic honey comb is 2 ~ 50nm, and nano titanium oxide load percentage is 8 ~ 15% of ceramic honey comb mass ratio.
Further, described ceramic honey comb is the one of cordierite, mullite or aluminium titanates.
A preparation method for Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, is characterized in that comprising the following steps
(1) ceramic honey comb pretreatment: ceramic honey comb is cut into 1cm
3sample, the ceramic honey comb sample of well cutting is put into acid solution boil, boiling time is 1 hour, then by the honeycomb ceramic filter of acid solution process, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: ceramic honey comb step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 5 ~ 10 hours, flood rear taking-up ceramic honey comb, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 ~ 2 hour, is cooled to room temperature and obtains Supported Honeycomb Ceramics nano titanium dioxide photocatalyst after having calcined.
Embodiment one
(1) ceramic honey comb pretreatment: cordierite is cut into 1cm
3sample, the cordierite sample of well cutting is put into 50% glacial acetic acid solution boil, boiling time is 1 hour, then the cordierite of glacial acetic acid process is filtered, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: cordierite step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 5 hours, flood rear taking-up cordierite, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 hour, is cooled to room temperature and obtains the agent of cordierite load nano-titanium dioxide photocatalysis after having calcined, and weighs and learns that load factor is 8.5%.
Embodiment two
(1) ceramic honey comb pretreatment: cordierite is cut into 1cm
3sample, the cordierite sample of well cutting is put into 50% glacial acetic acid solution boil, boiling time is 1 hour, then the cordierite of glacial acetic acid process is filtered, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: cordierite step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 10 hours, flood rear taking-up cordierite, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 hour, is cooled to room temperature and obtains the agent of cordierite load nano-titanium dioxide photocatalysis after having calcined, and weighs and learns that load factor is 10%.
Embodiment three
(1) ceramic honey comb pretreatment: aluminium titanates is cut into 1cm
3sample, the aluminum titanate sample of well cutting is put into 50% glacial acetic acid solution boil, boiling time is 1 hour, then the aluminium titanates of glacial acetic acid process is filtered, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: aluminium titanates step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 5 hours, flood rear taking-up aluminium titanates, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 hour, is cooled to room temperature and obtains the agent of aluminium titanates load nano-titanium dioxide photocatalysis after having calcined, and weighs and learns that load factor is 10.2%.
Embodiment four
(1) ceramic honey comb pretreatment: aluminium titanates is cut into 1cm
3sample, the aluminum titanate sample of well cutting is put into 50% glacial acetic acid solution boil, boiling time is 1 hour, then the aluminium titanates of glacial acetic acid process is filtered, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: aluminium titanates step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 10 hours, flood rear taking-up aluminium titanates, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 hour, is cooled to room temperature and obtains the agent of aluminium titanates load nano-titanium dioxide photocatalysis after having calcined, and weighs and learns that load factor is 15%.
Embodiment five
The aluminium titanates load nano-titanium dioxide obtained in embodiment four is arranged on gas-solid to be fixed in bed photocatalytic reactor, and passing into concentration is 2g/m
3waste gas, simultaneously time of ultraviolet irradiation is 15min, and detect the content of organic exhaust gas in Exhaust Gas, result shows purification efficiency 98%.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (4)
1. a Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, it is characterized in that: this catalyst is formed by the carrier for ceramic honeycomb catalyst of porous honeycomb and nano titanium oxide load, wherein the aperture of ceramic honey comb is 2 ~ 50nm, and nano titanium oxide load percentage is 8 ~ 15% of ceramic honey comb mass ratio.
2. a kind of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst according to claim 1, is characterized in that: described ceramic honey comb is the one of cordierite, mullite or aluminium titanates.
3. a preparation method for Supported Honeycomb Ceramics nano titanium dioxide photocatalyst, is characterized in that comprising the following steps:
(1) ceramic honey comb pretreatment: ceramic honey comb is cut into 1cm
3sample, the ceramic honey comb sample of well cutting is put into acid solution boil, boiling time is 1 hour, then by the honeycomb ceramic filter of acid solution process, add deionized water, filter after soaking 30min, then use deionized water rinsing twice, filtered to be placed in baking oven 80 degree dry 2 hours, put into Muffle furnace 300 degree of calcinings 3 hours;
(2) prepare TiO 2 sol: butyl titanate and ethanol are mixed by 1:2 volume ratio, then slowly drip the glacial acetic acid ethanolic solution of 15%, magnetic agitation, dropwise rear continuation and stir 30min, leave standstill and obtain TiO 2 sol;
(3) preparation of Supported Honeycomb Ceramics nano titanium dioxide photocatalyst: ceramic honey comb step (1) obtained immerses in the obtained TiO 2 sol of step (2), dip time is 5 ~ 10 hours, flood rear taking-up ceramic honey comb, then Muffle furnace calcining is put into, calcining heat 400 ~ 500 degree, calcination time is 1 ~ 2 hour, is cooled to room temperature and obtains Supported Honeycomb Ceramics nano titanium dioxide photocatalyst after having calcined.
4. a purposes for Supported Honeycomb Ceramics nano titanium dioxide photocatalyst as claimed in claim 1, is characterized in that: it is applied to the photocatalysis treatment of waste gas.
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Cited By (9)
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| CN105924202A (en) * | 2016-04-28 | 2016-09-07 | 河南省格林沃特净化器股份有限公司 | Preparation technology of SCR catalyst carrier for diesel engine tail gas post-treatment |
| CN106116672A (en) * | 2016-06-29 | 2016-11-16 | 梅庆波 | A kind of indoor air purification method for preparing foamed ceramics |
| CN108002431A (en) * | 2017-12-29 | 2018-05-08 | 陕西瑞科新材料股份有限公司 | A kind of preparation method of richness titanium metatitanic acid alumina supporter |
| CN108786826A (en) * | 2018-06-15 | 2018-11-13 | 肇庆市华师大光电产业研究院 | A kind of solid-carrying type copper yttrium codope bismuth ferrite photocatalyst and its preparation method and application |
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Cited By (14)
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| CN105924202A (en) * | 2016-04-28 | 2016-09-07 | 河南省格林沃特净化器股份有限公司 | Preparation technology of SCR catalyst carrier for diesel engine tail gas post-treatment |
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| CN106116672A (en) * | 2016-06-29 | 2016-11-16 | 梅庆波 | A kind of indoor air purification method for preparing foamed ceramics |
| CN109772348A (en) * | 2017-11-13 | 2019-05-21 | 广州中国科学院沈阳自动化研究所分所 | A kind of erbium-codoped bismuth ferrite photocatalyst of solid-carrying type copper and its preparation method and application |
| CN109772349A (en) * | 2017-11-13 | 2019-05-21 | 广州中国科学院沈阳自动化研究所分所 | A kind of erbium-codoped bismuth ferrite photocatalyst of solid-carrying type zinc and its preparation method and application |
| CN108002431B (en) * | 2017-12-29 | 2019-11-05 | 陕西瑞科新材料股份有限公司 | A kind of preparation method of richness titanium metatitanic acid alumina supporter |
| CN108002431A (en) * | 2017-12-29 | 2018-05-08 | 陕西瑞科新材料股份有限公司 | A kind of preparation method of richness titanium metatitanic acid alumina supporter |
| CN108786826A (en) * | 2018-06-15 | 2018-11-13 | 肇庆市华师大光电产业研究院 | A kind of solid-carrying type copper yttrium codope bismuth ferrite photocatalyst and its preparation method and application |
| CN108786826B (en) * | 2018-06-15 | 2021-09-03 | 肇庆市华师大光电产业研究院 | Immobilized copper-yttrium co-doped bismuth ferrite photocatalyst and preparation method and application thereof |
| CN111018564A (en) * | 2019-12-27 | 2020-04-17 | 苏州尼普环境科技有限公司 | Piezoelectric catalytic porous ceramic material, preparation method and application thereof |
| CN113318722A (en) * | 2020-02-28 | 2021-08-31 | 广东粤能净环保科技有限公司 | Photocatalyst and preparation method and application thereof |
| CN113318726A (en) * | 2020-02-28 | 2021-08-31 | 广东粤能净环保科技有限公司 | Photocatalyst with negative oxygen ion releasing function and preparation method and application thereof |
| CN113318726B (en) * | 2020-02-28 | 2023-08-01 | 中科粤能净(山东)新材料有限公司 | Photocatalyst with function of releasing negative oxygen ions and preparation method and application thereof |
| CN113318722B (en) * | 2020-02-28 | 2023-08-01 | 中科粤能净(山东)新材料有限公司 | Photocatalyst, and preparation method and application thereof |
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