Preparation method of ordered mesoporous titania/silver photocatalyst

A mesoporous titanium dioxide and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low photocatalytic activity, poor order, and specific surface area. Small and other problems, to achieve the effect of simple preparation process, low cost and high orderliness

Inactive Publication Date: 2012-10-24
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem of low specific surface area and poor order of the existing titanium dioxide / silver composite material, which leads to low photocatalytic activity, and provides a preparation method of ordered mesoporous titanium dioxide / silver photocatalyst

Method used

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  • Preparation method of ordered mesoporous titania/silver photocatalyst
  • Preparation method of ordered mesoporous titania/silver photocatalyst
  • Preparation method of ordered mesoporous titania/silver photocatalyst

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of a kind of ordered mesoporous titania / silver photocatalyst of this specific embodiment is carried out according to the following steps:

[0022] 1. Weigh surfactant, solvent, strong oxidant, silver source, wherein the mass ratio of surfactant to solvent is 0.01~0.25:1, the mass ratio of strong oxidant to surfactant is 0.05~0.2:1, silver source The mass ratio to the surfactant is 0.001-0.2:1; then dissolve the weighed surfactant in the solvent, add a strong oxidant, stir for 0.5-36 hours, then add the silver source, and stir in a dark room for 1-36 hours. 24 hours, obtain silver solution;

[0023] 2. Weighing the titanium source and the solvent, wherein the mass ratio of the titanium source to the solvent is 0.025 to 0.2:1, then adding the titanium source to the solvent and stirring for 0.5 to 36 hours to obtain a titanium precursor;

[0024] 3. Measure the silver solution prepared in step 1 and the titanium precursor pr...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the surfactant described in step one is triblock copolymer (P123, F127), polyvinylpyrrolidone (PVP), sodium lauryl sulfate ( SDS), cetyltrimethylammonium bromide (CTAB), acrylonitrile-butadiene-styrene copolymer (ABS), polyetherimide (PEI), lauryl polyethylene glycol ether (Brij-35), polyethylene glycol (PEG-400) and triethanolamine (TEA) or both are mixed in any proportion. Others are the same as in the first embodiment.

[0028] Embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the solvent described in step 1 is one of deionized water, ethanol, isopropanol and n-butanol or mixed in any proportion. Others are the same as in the first or second embodiment.

specific Embodiment approach 4

[0029] Embodiment 4: The difference between this embodiment and one of Embodiments 1 to 3 is that the stirring time after adding the strong oxidizing agent in step 1 is 1-36 hours. Others are the same as those in the first to third specific embodiments.

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Abstract

The invention discloses a preparation method of ordered mesoporous titania/silver photocatalyst, relating to a preparation method of titania/silver and aiming to solve the technical problems of small specific surface area, poor orderliness and low photocatalytic activity of mesoporous titania/silver photocatalyst prepared by prior arts. The preparation method comprises the steps of silver solution preparation, titanium precursor preparation, titania/silver gel preparation, and heat treatment. The inventive photocatalyst has specific surface area of 120-160 m<2>/g, has the advantages of uniform mesopores and high catalytic activity; can be applied to photocatalysis field, and water treatment field of lake, ocean, municipal sewage and industrial sewage.

Description

technical field [0001] The invention relates to a preparation method of titanium dioxide / silver photocatalyst. Background technique [0002] TiO 2 As a photocatalyst for the treatment of environmental pollutants is one of the research hotspots in recent years. Among them, mesoporous titanium dioxide has a large specific surface area. Therefore, the surface can absorb more water and hydroxyl groups, and the water and hydroxyl groups adsorbed on the surface can react with light to generate strong oxidative hydroxyl radicals, which are the main species for photocatalytic degradation of organic pollutants. In addition, mesoporous TiO 2 The well-developed and ordered mesoporous channels are more conducive to the diffusion of reactants and products, so the photocatalytic activity can be greatly improved. But TiO 2 The band gap (3.2eV) is wide, the spectral response range is narrow, and the absorption wavelength is mainly concentrated in the ultraviolet region (<387.5nm), a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J35/10
Inventor 付宏刚李婷周卫田国辉王蕾邢子鹏潘凯孙凡飞曲阳
Owner HEILONGJIANG UNIV
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