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Production of TiO2 naometer light catalyzing net from foam metal carrier

A foam metal, nano-light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of small load area, small specific surface area, poor stability, etc. The effect of large specific surface area and stable chemical properties

Inactive Publication Date: 2005-12-28
SHANGHAI JIAO TONG UNIV
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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 overcome the deficiencies in the prior art, to provide a metal foam loaded TiO 2 The preparation method of the nanometer photocatalytic network is to use metal foam as the matrix material, firstly carry out the inert transition intermediate layer such as loading silicon dioxide or aluminum oxide or aluminum silicate, and then load TiO 2 Nano photocatalyst effectively solves the problems of small specific surface area, small loading area, poor binding and poor stability, and significantly improves the photocatalytic activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Preparation of silica sol for the transition intermediate layer: slowly add a mixture of 180ml of water and 4.18ml (37%) hydrochloric acid dropwise to a mixture of 224ml of ethyl orthosilicate and 116.6ml of ethanol under magnetic constant temperature vigorous stirring , the system was sealed, fully stirred, and the above-mentioned fully stirred solution was sealed and allowed to age for a day to obtain a transparent sol;

[0019] 2. Preparation of sol with tetrabutyl titanate as precursor: the molar concentration of tetrabutyl titanate in the precursor solution is 0.2mol / L, and the preparation process of sol is: add 6.81ml tetrabutyl titanate to 86.75 ml of ethanol solution, add 3.84ml of diethanolamine dropwise while stirring, and then add 0.36ml of water and 2.24ml of tetraethyl orthosilicate dropwise after stirring well, and seal the above fully stirred solution for one day to age it , to obtain a transparent sol;

[0020] 3. Soak metal nickel foam in the above-...

Embodiment 2

[0023] 1. Preparation of silica sol for the transitional intermediate layer: slowly add the mixture of 270ml water and 8.36ml (37%) hydrochloric acid dropwise to 268.8ml tetraethyl orthosilicate and 233.2ml ethanol under magnetic constant temperature vigorous stirring In the mixture, seal the system, stir it fully, seal the above-mentioned fully stirred solution and let it age for 4 hours to obtain a transparent sol;

[0024] 2. Preparation of sol with tetrabutyl titanate as precursor: the molar concentration of tetrabutyl titanate in the precursor solution is 0.5mol / L, and the preparation process of sol is: add 17.03ml tetrabutyl titanate to 72.71 ml of ethanol solution, add 6 ml of diethanolamine drop by drop while stirring, and then add 0.9 ml of water and 3.36 ml of ethyl orthosilicate drop by drop after stirring well, and keep the above-mentioned well-stirred solution airtight and let it age for half a day. Obtain a transparent sol;

[0025] 3. Soak metal nickel foam in th...

Embodiment 3

[0028] 1. Preparation of silica sol for the transition intermediate layer: slowly add dropwise a mixture of 270ml of water and 10.45ml (37%) hydrochloric acid to a mixture of 112ml of ethyl orthosilicate and 291.5ml of ethanol under magnetic constant temperature vigorous stirring , the system was sealed, fully stirred, and the above-mentioned fully stirred solution was sealed and left for 4 hours to age to obtain a transparent sol;

[0029] 2. Preparation of sol with tetrabutyl titanate as precursor: the molar concentration of tetrabutyl titanate in the precursor solution is 1.0mol / L, and the preparation process of sol is: add 34.06ml tetrabutyl titanate to 52.3 ml of ethanol solution, add 9.6ml of diethanolamine dropwise while stirring, and then add 1.8ml of water and 2.24ml of tetraethyl orthosilicate dropwise after stirring well, and seal the above well-stirred solution for half a day to age it , to obtain a transparent sol;

[0030] 3. Soak metal nickel foam in the above-...

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Abstract

A foam metal carried nano-TiO2 photocatalyst mesh with high chemical stability, air permeability, specific surface area and photo catalytic activity is prepared through dipping the foam metal substrate in the sol of SiO2, Al2O3 or aluminium silicate, drying, calcining to generate a transition layer, immersing in the sol of tetrabutyl titanate, TiCl4, or TiCl3, drying, and calcining.

Description

technical field [0001] The present invention relates to a kind of preparation method of catalytic network, especially a kind of foam metal supported TiO 2 Preparation method of nano photocatalytic mesh. It belongs to the field of chemical engineering and environmental protection. Background technique [0002] Photocatalysis is an emerging technology for environmental purification. Nano-TiO 2 Photocatalyst can effectively oxidize or reduce harmful gas molecules adsorbed on its surface, kill bacteria, inhibit viruses, and convert harmful organic matter, bacteria, etc. into harmless substances such as water and carbon dioxide, without any secondary pollution . Most of the existing photocatalysts are TiO 2 Nanopowder, due to TiO 2 The photocatalytic effect requires the TiO 2 The active components are fixed and require a certain light action area and reaction time, so increasing the TiO 2 High photocatalytic efficiency and the use of suitable photocatalytic carriers and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 上官文峰胡海施建伟袁坚陈铭夏
Owner SHANGHAI JIAO TONG UNIV
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