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Metal/TiO2 composite multilayer film photocatalyst and preparation method thereof

A technology of composite multi-layer film and photocatalyst, which can be used in illumination water/sewage treatment, textile industry wastewater treatment, etc. It can solve the problems of narrow spectral response range, inability to recycle, low quantum efficiency, etc., and achieve great flexibility and reliability. Controllability, beneficial to recycling, and the effect of improving photocatalytic activity

Inactive Publication Date: 2013-06-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, highly active TiO 2 Photocatalysts are all powdered, but powdered catalysts are easy to agglomerate in aqueous solution and cannot be recycled after use, which increases the cost virtually and affects the process of commercialization of photocatalytic technology
At the same time due to TiO 2 As a photocatalyst, it has a narrow spectral response range (the forbidden band width is 3.2eV, and its spectral response range is in the ultraviolet region) and low quantum efficiency.

Method used

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  • Metal/TiO2 composite multilayer film photocatalyst and preparation method thereof
  • Metal/TiO2 composite multilayer film photocatalyst and preparation method thereof
  • Metal/TiO2 composite multilayer film photocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] TiO 2 / Pt / TiO 2 The composite multilayer film photocatalyst is prepared by multiple radio frequency magnetron sputtering. Among them, TiO 2 The diameter of ceramic target and Pt target is 50mm, TiO 2 The sputtering power of the target and the Pt target were 200W and 30W respectively, and the operating frequency of the radio frequency magnetron sputtering apparatus was 13.56MHz.

[0042] ginseng figure 1 Shown, TiO 2 / Pt / TiO 2 The preparation process of composite multilayer film photocatalyst comprises the following steps:

[0043] (1), the quartz plate carrier (1.5 × 1cm 2 ) is placed in a vacuum reaction chamber, and the quartz plate carrier is placed parallel to the distance from the target (TiO 2 Ceramic target or Pt target) on the sample stage of 60mm;

[0044] (2), the pressure in the vacuum reaction chamber is reduced to 1×10 by a mechanical rotary pump or a vortex molecular pump -4 Pa;

[0045] (3), feed argon into the vacuum reaction chamber and contr...

Embodiment 2

[0063] Embodiment two (the time of Pt film layer deposition is 0 seconds):

[0064] TiO 2 / Pt / TiO 2 The composite multilayer film photocatalyst is prepared by multiple radio frequency magnetron sputtering. Among them, TiO 2 The diameter of ceramic target and Pt target is 50mm, TiO 2 The sputtering power of the target and the Pt target were 200W and 30W respectively, and the operating frequency of the radio frequency magnetron sputtering apparatus was 13.56MHz.

[0065] TiO 2 / Pt / TiO 2 The preparation process of composite multilayer film photocatalyst comprises the following steps:

[0066] (1), the quartz plate carrier (1.5 × 1cm 2 ) is placed in a vacuum reaction chamber, and the quartz plate carrier is placed parallel to the distance from the target (TiO 2Ceramic target or Pt target) on the sample stage of 60mm;

[0067] (2), the pressure in the vacuum reaction chamber is reduced to 1×10 by a mechanical rotary pump or a vortex molecular pump -4 Pa;

[0068] (3), f...

Embodiment 3

[0075] Embodiment three (the time of Pt film layer deposition is 3 seconds):

[0076] TiO 2 / Pt / TiO 2 The composite multilayer film photocatalyst is prepared by multiple radio frequency magnetron sputtering. Among them, TiO 2 The diameter of ceramic target and Pt target is 50mm, TiO 2 The sputtering power of the target and the Pt target were 200W and 30W respectively, and the operating frequency of the radio frequency magnetron sputtering apparatus was 13.56MHz.

[0077] TiO 2 / Pt / TiO 2 The preparation process of composite multilayer film photocatalyst comprises the following steps:

[0078] (1), the quartz plate carrier (1.5 × 1cm 2 ) is placed in a vacuum reaction chamber, and the quartz plate carrier is placed parallel to the distance from the target (TiO 2 Ceramic target or Pt target) on the sample stage of 60mm;

[0079] (2), the pressure in the vacuum reaction chamber is reduced to 1×10 by a mechanical rotary pump or a vortex molecular pump -4 Pa;

[0080] (3)...

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Abstract

The invention relates to a metal / TiO2 composite multilayer film photocatalyst and a preparation method thereof. The method comprises the following steps of: (1) putting a carrier into a vacuum reaction cavity, and controlling pressure in the vacuum reaction cavity in a first pressure range; (2) introducing argon into the vacuum reaction cavity, and controlling pressure in the vacuum reaction cavity in a second pressure range; (3) respectively depositing a first TiO2 film layer, a Pt film layer and a second TiO2 film layer on the surface of the carrier by a magnetron sputtering method to obtain a photocatalyst with a three-layer film structure; and (4) sintering the photocatalyst obtained in the step (3) in air, and naturally cooling to room temperature. The photocatalyst has the advantages of high catalytic activity and low cost.

Description

technical field [0001] The present invention relates to a metal / TiO 2 Composite multilayer film photocatalyst and preparation method thereof, especially relate to a kind of TiO 2 / Pt / TiO 2 Composite multilayer film photocatalyst and preparation method thereof. Background technique [0002] In recent years, the problem of water environment has become one of the main problems restricting the survival and development of human beings. Using semiconductor photocatalysis technology to degrade organic pollutants in water is one of the important means to deal with water environment pollution. The principle is that when the surface of a semiconductor photocatalyst is irradiated with light with energy greater than the bandgap width of the semiconductor photocatalyst, the electrons in the valence band of the catalyst acquire the energy of the photons, and thus jump to the conduction band to form photogenerated electrons, and correspondingly form photogenerated voids in the valence ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42C02F1/32C02F103/30
Inventor 董雯方亮郑分刚沈明荣
Owner SUZHOU UNIV
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