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Honeycomb ceramic-supported nano titanium dioxide photo-catalyst and preparation method of same

A technology of nano-titanium dioxide and honeycomb ceramics, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of low utilization rate of photocatalyst light source, difficulty in photocatalyst recovery, etc. Effects of exfoliation and surface area increase

Inactive Publication Date: 2015-12-09
霍普科技(天津)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a nano-titanium dioxide photocatalyst supported by honeycomb ceramics and its preparation method, which overcomes the shortcomings of low photocatalyst light source utilization and difficult photocatalyst recovery in the prior art.

Method used

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preparation example Construction

[0016] A method for preparing a honeycomb ceramic loaded nano-titanium dioxide photocatalyst, characterized in that it comprises the following steps

[0017] (1) Honeycomb ceramic pretreatment: cut the honeycomb ceramic into 1cm 3 Put the cut honeycomb ceramic sample into the acid solution and boil for 1 hour, then filter the honeycomb ceramic treated with the acid solution, add deionized water, filter after soaking for 30min, and rinse with deionized water Twice, after filtering, put it in an oven to dry at 80 degrees for 2 hours, and put it in a muffle furnace for calcination at 300 degrees for 3 hours;

[0018] (2) Preparation of titanium dioxide sol: mix tetrabutyl titanate and ethanol evenly at a volume ratio of 1:2, then slowly add 15% glacial acetic acid ethanol solution dropwise, stir magnetically, continue to stir for 30 minutes after the dropwise addition, and stand still to obtain Titanium dioxide sol;

[0019] (3) Preparation of honeycomb ceramics loaded nano-tit...

Embodiment 1

[0021] (1) Honeycomb ceramic pretreatment: cut cordierite into 1cm 3 Put the cut cordierite sample into 50% glacial acetic acid solution and boil for 1 hour, then filter the cordierite treated with glacial acetic acid, add deionized water, filter after soaking for 30min, and then use Rinse twice with deionized water, after filtering, dry in an oven at 80°C for 2 hours, and put it in a muffle furnace for calcination at 300°C for 3 hours;

[0022] (2) Preparation of titanium dioxide sol: mix tetrabutyl titanate and ethanol evenly at a volume ratio of 1:2, then slowly add 15% glacial acetic acid ethanol solution dropwise, stir magnetically, continue to stir for 30 minutes after the dropwise addition, and stand still to obtain Titanium dioxide sol;

[0023] (3) Preparation of nano-sized titanium dioxide photocatalyst supported by honeycomb ceramics: immerse the cordierite obtained in step (1) into the titanium dioxide sol prepared in step (2), the immersion time is 5 hours, take ...

Embodiment 2

[0025] (1) Honeycomb ceramic pretreatment: cut cordierite into 1cm 3 Put the cut cordierite sample into 50% glacial acetic acid solution and boil for 1 hour, then filter the cordierite treated with glacial acetic acid, add deionized water, filter after soaking for 30min, and then use Rinse twice with deionized water, after filtering, dry in an oven at 80°C for 2 hours, and put it in a muffle furnace for calcination at 300°C for 3 hours;

[0026] (2) Preparation of titanium dioxide sol: mix tetrabutyl titanate and ethanol evenly at a volume ratio of 1:2, then slowly add 15% glacial acetic acid ethanol solution dropwise, stir magnetically, continue to stir for 30 minutes after the dropwise addition, and stand still to obtain Titanium dioxide sol;

[0027] (3) Preparation of nano-sized titanium dioxide photocatalyst supported by honeycomb ceramics: immerse the cordierite obtained in step (1) into the titanium dioxide sol prepared in step (2), the immersion time is 10 hours, take...

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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 [0001] The invention relates to the field of immobilized catalysts, in particular to the field of immobilized photocatalysts, in particular to a honeycomb ceramic-supported nano titanium dioxide photocatalyst and a preparation method thereof. Background technique [0002] With the expansion of the scope of human production activities, more and more serious environmental pollution problems have emerged, especially the pollution of volatile organic compounds to the atmospheric environment is very serious, which has attracted more and more people's attention in recent years. Most of these volatile organic compounds are toxic to the human body, and some of them can induce various serious diseases, have carcinogenic or teratogenic effects, and can also photochemically react with nitrogen oxides in the atmosphere to destroy the atmospheric ozone layer. Therefore, the control of volatile organic compounds has become the research focus of atmospheric environmental sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/08B01J21/16B01J35/10B01D53/86B01D53/44
Inventor 孙浩
Owner 霍普科技(天津)股份有限公司
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