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Process for preparing nanometer titanium dioxide membrane photocatalyst

A nano-titanium dioxide, photocatalyst technology, used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc.

Inactive Publication Date: 2005-03-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The microemulsion hydrothermal synthesis method is a good low-temperature preparation method.
Langmuir15 (1999) 8822 reported pure anatase type and rutile type titanium dioxide with microemulsion hydrothermal synthesis under low temperature, acidic conditions, but it is only to pure anatase on hydrothermal time, hydrothermal temperature and microemulsion acidity The effect on the formation of rutile and rutile TiO2 was studied

Method used

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  • Process for preparing nanometer titanium dioxide membrane photocatalyst
  • Process for preparing nanometer titanium dioxide membrane photocatalyst
  • Process for preparing nanometer titanium dioxide membrane photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method of low-temperature microemulsion hydrothermal synthesis of crystal form-controllable titanium dioxide photocatalyst is as follows: add 10ml Triton X-100, 6ml n-hexanol, and 16ml cyclohexane into a 100ml single-necked flask, stir evenly with a magnetic stirrer, then add 4ml to dissolve 0.0682g (NH 4 ) 2 SO 4 10M hydrochloric acid, and then add 3.4ml tetrabutyl titanate dropwise at 25°C at 10 drops / min using a constant pressure funnel. After the dropwise addition, stir at a constant speed for 6 hours to complete the hydrolysis reaction to obtain a yellow transparent microemulsion. The microemulsion was transferred into a polytetrafluoroethylene-lined autoclave and kept at 120°C for 13h. After the autoclave was cooled to room temperature, the samples were washed with ethanol and water until the pH value was neutral, and dried in an infrared oven for 12 hours to obtain the samples. And the percentage composition of the total molar amount of sulfate ions is 1....

Embodiment 2

[0020] Add 0.0599g (NH 4 ) 2 SO 4 , except that the amount of sulfate ion added is different, other reaction conditions such as titanium source, titanium source hydrolysis temperature and time, anion source in the water phase, microemulsion acidity and hydrothermal time temperature, etc. are all exactly the same as in Example 1, and the sample is obtained Denoted as S-1.12.

Embodiment 3

[0022] Add 0.0512g (NH 4 ) 2 SO 4 , except that the amount of sulfate ion added is different, other reaction conditions such as titanium source, titanium source hydrolysis temperature and time, anion source in the water phase, microemulsion acidity and hydrothermal time temperature, etc. are all exactly the same as in Example 1, and the sample is obtained Recorded as S-0.96.

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Abstract

The invention relates to a kind of manufacturing method of millimicron titanium dioxide photocatalyst, especially also relates to a manufacturing method of crystal-form controllable titanium dioxide photocatalyst in low temperature. It uses micro emulsifiable solution to hydro heating synthesis, and the feature of which is as follows: make the titanium source hydrolyze in the acid micro emulsifiable solution under certain condition; through adjusting the proportion of negative ion in water phase, the titanium dioxide micro emulsifiable solution can be get; then after crystallizing with hydro heating and emulsion resolving in pressure pan that having the inside lining of polytetrafluoroethylene (PTFE), the anatase and the rutile crystal-form proportion controllable titanium dioxide photocatalyst can be acquired.

Description

technical field [0001] The invention relates to a preparation method of nano titanium dioxide photocatalyst, in particular to a preparation method of nano titanium dioxide photocatalyst with controllable crystal form at low temperature. Background technique [0002] In recent years, as people pay more and more attention to environmental protection, the requirements for the discharge of three wastes such as organic wastewater and automobile exhaust have been continuously improved. It has attracted extensive attention from governments and researchers all over the world. Because it is easy to use and operate, it only needs to be carried out at normal temperature and pressure; it can completely destroy pollutants in the air and water, completely mineralize them into harmless substances such as carbon dioxide and water, and avoid secondary pollution. Semiconductor multiphase Photocatalytic materials are gradually becoming a supplement to traditional pollution control materials, ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/08
Inventor 张金龙严茂程陈锋田宝柱孙健
Owner EAST CHINA UNIV OF SCI & TECH
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