A-SnWO4/In2S3 composite photocatalyst

A composite light and catalyst technology, applied in the field of photocatalysis, can solve the problems of limiting practical application and reducing photocatalytic activity, and achieve the effects of wide application prospects and industrialization prospects, rich active sites, and high photocatalytic activity

Pending Publication Date: 2022-05-13
HUAIBEI NORMAL UNIVERSITY
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Problems solved by technology

However, the photogenerated electrons and holes in α-SnWO 4 The interior is easy to recombine, which will significantly reduce its photocatalytic activity and greatly limit its practical application in the field of photocatalysis

Method used

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  • A-SnWO4/In2S3 composite photocatalyst
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  • A-SnWO4/In2S3 composite photocatalyst

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Embodiment

[0034] a-SnWO 4 / In 2 S 3 The preparation method of composite photocatalyst comprises the steps:

[0035] (1) Preparation of a-SnWO by hydrothermal method 4 Nanosheets;

[0036] 1.3297 g SnCl 2 ×2H 2 O is completely dissolved in 0.1 mol / L HCL, and 1.7998 g Na 2 WO 4 ×2H 2 O was completely dissolved in 20 ml deionized water; the Na 2 WO 4 ×2H 2 O solution was added dropwise to SnCl 2 ×2H 2 O solution, and vigorously stirred to form a mixed solution;

[0037] Use 0.1 mol / L NaOH solution to adjust the pH value of the above mixed solution to 7 and stir vigorously for one hour; transfer the solution in step (5) to a 100 ml reactor for reaction, the reaction temperature is 200 °C, and the reaction time is 24 hours ;

[0038] After the reaction, the product was collected in a vacuum oven and dried at 60 °C for 12 hours to obtain a-SnWO 4 Nanosheets.

[0039] (2) Then put a-SnWO 4 load at In 2 S 3 surface;

[0040] Put 1.35 mmol of anhydrous citric acid in beaker ...

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Abstract

According to the a-SnWO4 / In2S3 composite photocatalyst, a-SnWO4 nanosheets are uniformly deposited on the surface of In2S3, so that the contact area of the a-SnWO4 nanosheets and the In2S3 is increased, and separation and migration of photo-induced electrons are enhanced. Compared with pure a-SnWO4 or In2S3, the a-SnWO4 / In2S3 composite photocatalyst has the advantages of larger specific surface area, abundant active sites and shorter charge migration distance, and shows higher photocatalytic performance, and the invention discloses a preparation process of the composite photocatalytic material. The a-SnWO4 nanosheet is loaded on the surface of In2S3, separation and migration of photon-generated carriers are facilitated, and an organic pollutant rhodamine B reagent can be continuously degraded under the condition of visible light; the preparation raw materials are common, low in cost, high in yield and suitable for actual production; the method has wide application prospects and industrialization prospects in the fields of hydrogen production through water photolysis, organic pollutant photodegradation, carbon dioxide reduction and the like.

Description

technical field [0001] The present invention relates to a-SnWO 4 / In 2 S 3 A composite photocatalyst and a preparation method thereof belong to the technical field of photocatalysis. Background technique [0002] As a kind of advanced oxidation method, photocatalytic degradation technology uses clean solar energy as the light source, and uses the redox ability of photocatalytic materials to decompose organic pollutants in water bodies. Photocatalytic technology can efficiently and thoroughly degrade organic pollutants in water, and has the advantages of energy saving, high efficiency, easy operation, and no secondary pollution. It is expected to become a cheap and feasible way to control water pollution. [0003] In 2 S 3 Because of its narrow forbidden band width and suitable valence band conduction band potential, it is one of the most widely studied and applied photocatalytic materials, but the limitation of In 2 S 3 The key problem of large-scale application lies ...

Claims

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Application Information

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IPC IPC(8): B01J27/047B01J35/10B01J37/10C01B3/04C02F1/30C02F101/30
CPCB01J27/047B01J37/10C01B3/042C02F1/30C02F2101/30C02F2101/308C02F2305/10B01J35/39B01J35/615Y02E60/36
Inventor 李强卢笑笑王李结张佑铭张鑫宋巨谱
Owner HUAIBEI NORMAL UNIVERSITY
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