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Titanium dioxide perforated micro-pipe photocatalyst modified by silver and its prodn. method

A technology of titanium dioxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as the difficulty of separating photocatalysts from degraded substances, and achieve uniform pore size and photocatalytic activity. The effect of improving and uniform structure

Inactive Publication Date: 2007-08-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The titanium dioxide photocatalyst has a special structure and is easy to separate and recycle, so it can fundamentally solve the problem of difficult separation of photocatalysts and degraded substances, showing good industrialization prospects

Method used

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  • Titanium dioxide perforated micro-pipe photocatalyst modified by silver and its prodn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In an ice-water bath, 25mL of 3.0mol L -1 TiCl 4 Add the solution dropwise to 150mL distilled water, heat the solution to 50°C while stirring, add 4.5mL glacial acetic acid dropwise, adjust the pH value of the solution to 7 with concentrated ammonia water, seal the container, age at 25°C for 72h, and pump the precipitate Filter, wash with deionized water and absolute ethanol three times respectively, bake in vacuum at 80°C for 24h, and bake at 450°C for 2h. Available white TiO 2 The porous microtube is recorded as 1# carrier.

Embodiment 2

[0024] In an ice-water bath, 25mL of 3.0mol L -1 TiCl 4 The solution was added dropwise into 150 mL of distilled water, keeping the temperature of the solution at 25° C., and the remainder was the same as in Example 1, which was recorded as 2# carrier.

Embodiment 3

[0026] In an ice-water bath, 25mL of 3.0mol L -1 TiCl 4 The solution was added dropwise to 150 mL of distilled water, and the temperature of the solution was raised to 75° C. under stirring, and the pH value was adjusted to 10. The rest are the same as in Example 1, and are recorded as 3# carrier.

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Abstract

The invention relates to a titania porous micro tube optical catalyst modified by silver for degrading fenol in water and relative preparation. The inventive catalyst is TiO2 porous micro tube modified by silver with specific structure composed from direct deposit method, that using titanic chloride as titanium source, directly hydrolyzing and depositing, in the condition with some dispersers, to be filtered, washed, dried, baked and activated to obtain final TiO2 optical catalyst modified by silver. The inventive catalyst has specific structure, integral appearance, and uniform aperture, thereby improving the ability for degrading fenol, with high activity in optical catalysis, the ability for degrading fenol into water and carbon dioxide, and wide application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a highly active silver-modified titanium dioxide porous microtube photocatalyst for degrading phenol in water bodies and a preparation method thereof. Background technique [0002] TiO 2 Photocatalyst materials have very broad application prospects in the degradation of organic pollutants, water and air purification, sterilization and disinfection, ecological building materials and other fields, which has aroused extensive interest and concern from governments, industrial departments and academic circles around the world. In the past ten years, semiconductor photocatalyst materials have become the research focus and focus of scientists from all over the world. There are more and more research papers and patents in this area, and thousands of research papers are published every year. In practical applications, TiO 2 Photocatalytic materials have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/50B01J35/10
Inventor 戴维林徐建华曹勇范康年
Owner FUDAN UNIV
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