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Silver carbonate/silver/tungsten trioxide ternary composite Z type photocatalyst and preparation method and application thereof

A technology of tungsten trioxide and ternary compounding, which is applied in the field of photocatalysis, can solve the problems such as the weakening of photoinduced electron reduction ability and hole oxidation ability, and achieve the improvement of redox ability and photocatalytic performance, effective transfer and separation, photocatalytic highly active effect

Active Publication Date: 2017-08-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the transfer of charge carriers, both the photoinduced reduction ability of electrons and the oxidation ability of holes become weaker.

Method used

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  • Silver carbonate/silver/tungsten trioxide ternary composite Z type photocatalyst and preparation method and application thereof
  • Silver carbonate/silver/tungsten trioxide ternary composite Z type photocatalyst and preparation method and application thereof
  • Silver carbonate/silver/tungsten trioxide ternary composite Z type photocatalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst, the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst uses silver carbonate as a carrier, silver carbonate is decorated with tungsten trioxide, trioxide Silver is loaded on tungsten.

[0037] In this embodiment, the mass percentage of silver carbonate in the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst is 10%, the mass percentage of tungsten trioxide is 88.5%, and the mass percentage of silver simple substance is 100%. Min content is 1.5%.

[0038] In this embodiment, silver carbonate has a rod-like structure and is a p-type semiconductor; tungsten trioxide has a sheet-like structure and is an n-type semiconductor.

[0039] A preparation method of the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst of the above-mentioned present embodiment, comprising the following steps:

[0040] (1) Ad...

Embodiment 2

[0052] A silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst, the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst uses silver carbonate as a carrier, silver carbonate is decorated with tungsten trioxide, trioxide Silver is loaded on tungsten.

[0053] In this embodiment, the mass percentage of silver carbonate in the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst is 20%, the mass percentage of tungsten trioxide is 77.1%, and the mass percentage of silver simple substance is 100%. Min content is 2.9%.

[0054] In this embodiment, silver carbonate has a rod-like structure and is a p-type semiconductor; tungsten trioxide has a sheet-like structure and is an n-type semiconductor.

[0055] A preparation method of the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst of the above-mentioned present embodiment, comprising the following steps:

[0056] (1) Ul...

Embodiment 3

[0064] A silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst, the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst uses silver carbonate as a carrier, silver carbonate is decorated with tungsten trioxide, trioxide Silver is loaded on tungsten.

[0065] In this embodiment, the mass percentage of silver carbonate in the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst is 30%, the mass percentage of tungsten trioxide is 65.7%, and the mass percentage of silver simple substance is 100%. Mineral content is 4.3%.

[0066] In this embodiment, silver carbonate has a rod-like structure and is a p-type semiconductor; tungsten trioxide has a sheet-like structure and is an n-type semiconductor.

[0067] A preparation method of the silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst of the above-mentioned present embodiment, comprising the following steps:

[0068] (1...

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Abstract

The invention discloses a silver carbonate / silver / tungsten trioxide ternary composite Z type photocatalyst and a preparation method and application thereof. Silver carbonate is used as a carrier of the Z type photocatalyst, tungsten trioxide is modified on the silver carbonate, and elemental silver is loaded on the tungsten trioxide. The preparation method comprises the following steps: mixing silver nitrate with tungsten trioxide dispersion liquid to prepare Ag<+>-WO3 dispersion liquid; and dropwise adding a sodium bicarbonate solution and carrying out light treatment. The Z type photocatalyst has the advantages of high photo-induced electron-cavity separating efficiency, high photocatalytic activity, high redox ability, good stability, corrosion resistance and the like. The preparation method has the advantages of simplicity and convenience, low costs of raw materials, low energy consumption, short consumed time, easily controlled conditions and the like, is suitable for continuous large-scale production, and facilitates industrialized utilization. The Z type photocatalyst can be used for degrading dye wastewater and antibiotic wastewater, has the advantages of stable photocatalytic performance, high corrosion resistance and high pollutant degradation efficiency, and is good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a silver carbonate / silver / tungsten trioxide ternary composite Z-type photocatalyst and a preparation method and application thereof. Background technique [0002] The application of semiconductor photocatalysts in the degradation of toxic and harmful organic pollutants is of great significance to solve environmental pollution. However, wide bandgap and low quantum efficiency are still the "bottleneck" of photocatalysts. Therefore, it is of great significance to actively develop efficient and renewable photocatalysts with visible light response to fully utilize solar energy. In addition, the development of semiconductor heterojunctions is also an effective way to solve these problems, which can expand the spectral range of light absorption and suppress the recombination of photoelectrons and holes. [0003] Among various semiconductor heterojunctions, the p-n junction combi...

Claims

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Application Information

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IPC IPC(8): B01J27/236C02F1/30C02F101/30C02F103/30
CPCC02F1/30B01J27/236C02F2101/308C02F2103/30B01J35/39Y02W10/37
Inventor 袁兴中蒋龙波陈晓红梁婕王侯吴志斌熊婷于瀚博曾光明
Owner HUNAN UNIV
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