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Zinc stannate photocatalyst rich in oxygen vacancies, preparation method and application

A technology of photocatalyst and zinc stannate, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as air pollution and water pollution, and achieve equipment Low requirements, broadened response range, and good visible light response

Active Publication Date: 2021-12-03
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention introduces concentrated ammonia water in the preparation process, which easily leads to air pollution and water pollution

Method used

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  • Zinc stannate photocatalyst rich in oxygen vacancies, preparation method and application
  • Zinc stannate photocatalyst rich in oxygen vacancies, preparation method and application
  • Zinc stannate photocatalyst rich in oxygen vacancies, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) 0.18g of SnCl 2 2H 2 O, 0.109g of ZnCl 2 , 0.20 g of NaOH and 0.0032 g of sodium dodecylbenzenesulfonate (SDBS) were dissolved in 80 mL of 50% ethanol solution to obtain a mixed solution. Transfer the mixed solution to a 100mL polytetrafluoroethylene sealed autoclave, hydrothermally react at 190°C for 20h to obtain the reaction product, wash with ethanol and deionized water three times in turn after filtration, and dry at 70°C for 5h to prepare stannic acid Zinc Zn 2 SnO 4 powder;

[0041] (2) the Zn of step (1) 2 SnO 4 The powder was soaked in 10g / L potassium persulfate solution for 60min, washed 3 times with deionized water after taking it out, and dried at 60°C for 6h to obtain the zinc stannate photocatalyst OVs-Zn rich in oxygen vacancies 2 SnO 4 -1.

Embodiment 2

[0043] (1) 0.20g of SnCl 2 2H 2 O, 0.110g of ZnCl 2 , 0.12g of NaOH and 0.0040g of SDBS were dissolved in 80mL of 60% ethanol solution to obtain a mixed solution. The mixed solution was transferred to a 100mL polytetrafluoroethylene sealed autoclave, and the reaction product was obtained by hydrothermal reaction at 180°C for 18h. After filtration, it was washed with ethanol and deionized water for 3 times, and dried at 60°C for 7h to prepare stannic acid. Zinc Zn 2 SnO 4 powder;

[0044] (2) the Zn of step (1) 2 SnO 4 The powder was soaked in 7.5g / L potassium peroxodisulfate solution for 60min, washed 3 times with deionized water after taking it out, and dried at 70°C for 5h to obtain the zinc stannate photocatalyst OVs-Zn rich in oxygen vacancies 2 SnO 4 -2.

[0045] sample analysis

[0046] figure 1 For Zn in Example 1 2 SnO 4 and OVs-Zn 2 SnO 4 The scanning electron microscope picture of -1, where a is Zn 2 SnO 4 , b is OVs-Zn 2 SnO 4 -1, zinc stannate Zn...

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Abstract

The invention discloses a preparation method of a zinc stannate photocatalyst rich in oxygen vacancies, which comprises the following steps: (1) dissolving stannous chloride dehydrate, zinc chloride, sodium hydroxide and sodium dodecyl benzene sulfonate in an ethanol solution, and carrying out hydrothermal reaction to obtain zinc stannate; and (2) soaking the zinc stannate obtained in the step (1) in a persulfate solution, taking out, washing and drying to obtain the zinc stannate photocatalyst rich in oxygen vacancies. The zinc stannate is prepared by adopting a one-pot hydrothermal reaction, the oxygen vacancy defect is generated by utilizing the etching effect of persulfate on the zinc stannate, and the response range of the zinc stannate photocatalyst rich in oxygen vacancies to visible light is widened. The zinc stannate photocatalyst rich in oxygen vacancies is good in visible light response, the degradation rate of bisphenol A within 60 min can reach 100%, and the mineralization efficiency of bisphenol A can reach 60% under the condition of visible light.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photocatalytic materials, and in particular relates to a zinc stannate photocatalyst rich in oxygen vacancies, a preparation method and an application. Background technique [0002] With the rapid development of medicine, chemical industry, printing and dyeing and other industries, refractory pollutants widely exist in various water bodies, seriously threatening the living environment of human beings. Compared with adsorption, flocculation, and membrane separation methods, advanced oxidation technology has the advantages of high mineralization efficiency for these refractory pollutants, less chemical consumption, and environmental friendliness. Photocatalytic oxidation has been a research hotspot in recent decades. . However, the low efficiency of photocatalytic systems under visible light greatly limits their engineering applications. [0003] As a composite metal material, zinc stannate h...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J35/10C02F1/30C02F101/34
CPCB01J23/14C02F1/30C02F2305/10C02F2101/345B01J35/61
Inventor 黄宝成俞琳倩赵依恒余烨颖金仁村
Owner HANGZHOU NORMAL UNIVERSITY
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