Photocatalytic membrane and its preparation process

A photocatalytic film and carrier technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as degradation and destruction of carrier adhesives, and achieve good photocatalysis without high temperature burning. The effect of active, good sustained photocatalytic ability

Inactive Publication Date: 2006-04-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem with this method is that this TiO 2 Photocatalysts will degrade and destroy the carrier binder while catalytically decomposing organic matter

Method used

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  • Photocatalytic membrane and its preparation process

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1: Take stainless steel net as carrier, coat polyurethane paint on stainless steel net; Before paint is dry, coat silane coupling agent DMC, WD-10, WD-30, WD-50, WD-60 or WD-80 (purchase from Wuhan University chemical factory), leaves standstill in the air to the silane coupling agent solidification of material surface; With anatase type, particle diameter is the TiO of 25 nanometers 2 Disperse in industrial alcohol to form a 20wt% suspension or sol, coat the suspension or sol on the silane coupling agent, and dry it under an infrared lamp to obtain a photocatalytic film.

[0022] Silane coupling

Embodiment 2

[0023] Embodiment 2: take copper net as carrier, coat polyester paint on copper net, coat silane coupling DMC, WD-10, WD-30, WD-50, WD-60 or WD-80 (from Wuhan University chemical factory purchase), in the air to stand still to the silane coupling agent solidification of material surface; TiO with anatase type, particle diameter is 25 nanometers 2 Disperse in industrial alcohol to form a 20wt% suspension or sol, coat the suspension or sol on the silane coupling agent, and dry it under an infrared lamp to obtain a photocatalytic film.

[0024] A silane coupling agent

Embodiment 3

[0025] Embodiment 3: take plastic net as carrier, coat polyurethane paint on plastic net; Coupling silane coupling agent WD-60, WD-10, DMC (purchase from Wuhan University chemical plant) on it, leave standstill in the air The silane coupling agent on the surface of the material is solidified, and the crystal form is dominated by anatase phase, mixed with about 20wt% rutile phase, and TiO with a particle size of 10 nanometers 2 Disperse in an aqueous solution of isobutanol with a volume concentration of 80% to form a 25wt% suspension or sol, coat the suspension or sol on a silane coupling agent, and dry it under an infrared lamp to obtain a photocatalyst membrane.

[0026] A silane coupling agent

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Abstract

The invention relates to photocatalysis film, which comprises attaching down-to-up mesh carrier, paint layer, silane coupling agent layer, and nano TiO2 film. The preparation method comprises: coating paint on said carrier; before drying, coating said coupling agent, static in air till solidified; dispersing the nano TiO2 in C1-C4 alcohol water solution to form 1~25wt% suspension or sol; coating the suspension or sol on said coupling agent, drying, and obtaining the film. This product can photocatalytic decompose a plurality organics in water and has wide application.

Description

technical field [0001] The invention relates to a photocatalytic film and a preparation method thereof. Background technique [0002] At present, the problem of water pollution is becoming more and more serious. One of the culprits of water pollution is some organic matter. How to efficiently decompose these organic pollutants has become a concern of more and more scientific and technological workers. [0003] In 1976, Carey et al. discovered TiO 2 -H 2 Since the O system can non-selectively oxidize and degrade organic matter under light conditions, semiconductor heterogeneous catalysis technology has become a new research discipline, because TiO 2 It has the advantages of good chemical stability, high photocatalytic activity, cheap and easy to obtain, etc. It has been widely used to treat various wastewater, but in the past, people mostly used TiO 2 Particles are suspended in the liquid phase to catalyze the decomposition of organic matter or other pollutants, but the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/02C02F1/30
CPCY02W10/37
Inventor 钟家柽张悦朱天翔龚楚清罗其荣
Owner WUHAN UNIV
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