Nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and preparation method thereof

A tungsten nitride modification, nitrogen vacancy technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem that catalysts cannot meet the requirements of efficient degradation and removal of organic pollutants, and limit silver phosphate compounding. The promotion and application of photocatalysts, weak photocorrosion resistance, etc., achieve the effects of rich and adjustable electronic structure, reduction of carrier recombination, and promotion of separation and transfer.

Active Publication Date: 2021-06-15
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modified silver phosphate catalyst still has the disadvantages of low photogenerated electron-hole pair separation efficiency, weak photocorrosion resistance, and weak photocatalytic activity, which lead to the catalyst not being able to meet the requirements of efficient degradation and removal of organic pollutants, thus greatly Limit the popularization and application of the existing silver phosphate composite photocatalyst

Method used

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  • Nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and preparation method thereof
  • Nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and preparation method thereof
  • Nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and preparation method thereof

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Embodiment 1

[0048] A nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst, comprising nitrogen vacancy doped tungsten nitride nanosheets, nitrogen vacancy doped tungsten nitride nanosheets loaded with silver phosphate particles, wherein nitrogen vacancies doped with nitrogen The mass ratio of tungsten oxide nanosheets to silver phosphate particles is 5.97×10 -4 .

[0049] In this embodiment, the atomic percentage of nitrogen vacancies in the nitrogen vacancy-doped tungsten nitride nanosheets is 6%.

[0050] A preparation method of the nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst in the above embodiment of the present invention, the preparation process flow chart is as follows figure 1 shown, including the following steps:

[0051] (1) Weigh 8.0g NaNO 3 Put it in a crucible, put it into a preheated muffle furnace, raise the temperature to 350°C and keep it for 30min, so that NaNO 3 Melt to get NaNO in mol...

Embodiment 2

[0059] A nitrogen vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst, which is basically the same as in Example 1, the only difference being that the mass ratio of nitrogen-vacancy-doped tungsten nitride nanosheets to silver phosphate particles in Example 2 is 1.49×10 -3 .

[0060] A preparation method of a nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst, which is basically the same as in Example 1, the only difference being that in the step (5) of Example 2, W 2 N 3 - The volume of the NV dispersion is 2.5 mL.

[0061] The silver phosphate composite photocatalyst modified by the nitrogen vacancy doped tungsten nitride prepared in Example 2, denoted as Ag 3 PO 4 @2.5mLW 2 N 3 -NV.

Embodiment 3

[0063] A nitrogen vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst, which is basically the same as in Example 1, the only difference being that the mass ratio of nitrogen-vacancy-doped tungsten nitride nanosheets to silver phosphate particles in Example 3 is 2.98×10 -3 .

[0064] A preparation method of a nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst, which is basically the same as in Example 1, the only difference being that in the step (5) of Example 3, W 2 N 3 - The volume of the NV dispersion is 5.0 mL.

[0065] The silver phosphate composite photocatalyst modified by the nitrogen vacancy doped tungsten nitride prepared in Example 3, denoted as Ag 3 PO 4 @5.0mL W 2 N 3 -NV.

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Abstract

The invention discloses a nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and a preparation method thereof. The catalyst comprises a nitrogen vacancy doped tungsten nitride nanosheet, and silver phosphate particles are loaded on the nitrogen vacancy doped tungsten nitride nanosheet. The preparation method comprises the following steps: preparing a nitrogen vacancy doped tungsten nitride nanosheet / Ag<+> dispersion liquid, and adding an HPO4<2-> solution to obtain the catalyst. The nitrogen-vacancy tungsten nitride-doped modified silver phosphate composite photocatalyst has the advantages of high photo-induced electron-hole pair separation efficiency, high light corrosion resistance, high photocatalytic activity and the like, is a novel efficient visible light photocatalyst, can be widely used for removing organic pollutants in the environment, and has high use value and good application prospect. The preparation method has the advantages of being simple in process, easy to operate, low in cost, green, free of pollution and the like, is suitable for large-scale preparation and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the technical field of semiconductor material photocatalysis and environmental protection, and relates to a silver phosphate composite photocatalyst, in particular to a nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst and a preparation method thereof. Background technique [0002] With the rapid development of economy and modern industry, the increasingly serious environmental pollution and ecological damage have become one of the most serious problems today. At the same time, human society is also facing the crisis of energy shortage. It is imminent to develop green, efficient and energy-saving water pollution treatment technologies. In recent decades, photocatalytic technology has become one of the most promising technologies in environmental remediation because it can directly use solar energy to degrade organic pollutants. Silver phosphate (Ag 3 PO 4 ) photocatalyst has excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10
CPCB01J27/24B01J35/004B01J35/1004Y02W10/37
Inventor 林燕杨春平聂金林吴少华池雨嫣钟淇麦文欣林倩
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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