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Preparation method and application of visible light response type Zn2SnO4/ZnO/SnO2 composite photocatalytic material

A composite photocatalysis and visible light technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve application limitations, high intrinsic recombination rate of photogenerated carriers and other problems, to achieve the effect of no secondary pollution, simple and fast preparation method

Inactive Publication Date: 2019-07-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application in the field of photocatalysis is limited due to its wide band gap (about 3.4 eV) and high intrinsic recombination rate of photogenerated carriers.

Method used

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  • Preparation method and application of visible light response type Zn2SnO4/ZnO/SnO2 composite photocatalytic material
  • Preparation method and application of visible light response type Zn2SnO4/ZnO/SnO2 composite photocatalytic material
  • Preparation method and application of visible light response type Zn2SnO4/ZnO/SnO2 composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see Figure 1-2 , first use an analytical balance to weigh 1.7571g SnCl 4 ·5H 2 Add O to a beaker, add 50mL of deionized water, and stir it with a stirrer to completely dissolve it. Under stirring conditions, 0.3415g ZnCl 2 added to the above solution. The reaction was continued for 30 min while stirring, and 15 mL of NaOH solution with a concentration of 4 mol / L was added dropwise, and the resulting solution was alkaline. After continuing to stir for 1 h, the resulting mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and hydrothermally reacted in a constant temperature drying oven at 180° C. for 24 h. Then cool at room temperature. After cooling to room temperature, filter and wash with water, and dry overnight at 60°C in a blast drying oven. The dried sample was ground in agate and calcined at 700°C for 6 hours to obtain Zn 2 SnO 4 / ZnO / SnO 2 composite photocatalyst. After 100 minutes of natural light irradiation, t...

Embodiment 2

[0024] see Figure 1-2 , first use an analytical balance to weigh 1.7571g SnCl 4 ·5H 2 Add O to a beaker, add 50mL of deionized water, and stir it with a stirrer to completely dissolve it. Under stirring conditions, 0.683g ZnCl 2 added to the above solution. The reaction was continued for 30 min while stirring, and 15 mL of NaOH solution with a concentration of 4 mol / L was added dropwise, and the resulting solution was alkaline. After continuing to stir for 1 h, the resulting mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and hydrothermally reacted in a constant temperature drying oven at 180° C. for 24 h. Then cool at room temperature. After cooling to room temperature, filter and wash with water, and dry overnight at 60°C in a blast drying oven. The dried sample was ground in agate and calcined at 700°C for 6 hours to obtain Zn 2 SnO 4 / ZnO / SnO 2 composite photocatalyst. After 100 minutes of natural light irradiation, th...

Embodiment 3

[0026] see Figure 1-2 , first use an analytical balance to weigh 1.7571g SnCl 4 ·5H 2 Add O to a beaker, add 50mL of deionized water, and stir it with a stirrer to completely dissolve it. Under stirring conditions, 1.0245g ZnCl 2 added to the above solution. The reaction was continued for 30 min while stirring, and 15 mL of NaOH solution with a concentration of 4 mol / L was added dropwise, and the resulting solution was alkaline. After continuing to stir for 1 h, the resulting mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and hydrothermally reacted in a constant temperature drying oven at 180° C. for 24 h. Then cool at room temperature. After cooling to room temperature, filter and wash with water, and dry overnight at 60°C in a blast drying oven. The dried sample was ground in agate and calcined at 700°C for 6 hours to obtain Zn 2 SnO 4 / ZnO / SnO 2 composite photocatalyst. After 100 minutes of natural light irradiation, t...

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Abstract

The invention relates to the technical field of synthesis of photocatalytic materials, in particular to a preparation method of a visible light response type Zn2SnO4 / ZnO / SnO2 composite photocatalyticmaterial, and the preparation method comprises the following steps of: 1) weighing 1.7571 g of SnCl4.5H2O in a beaker, adding 50 ml of deionized water, and stirring by a stirrer to completely dissolve; 2) adding 0.3415-1.366 g of ZnCl2 to the above solution under stirring condition, and adding 15 ml of a NaOH solution drop by drop; 3) after stirring for 1 hour, transferring the obtained mixed solution into a reaction kettle, carrying out hydrothermal reaction for 24 hours in a constant temperature drying oven at 180 DEG C, cooling at room temperature, filtering, washing with water, and dryingovernight at 60 DEG C in a blast drying oven, grinding a dried sample and calcining at 700DEG C for 6 hours. The method adopts a one-pot method to prepare the visible light response type Zn2SnO4 / ZnO / SnO2 composite photocatalytic material with a polyhedral structure, the prepared photocatalytic material has the characteristic of high-efficiency degradation of antibiotics under simulated light irradiation, and the preparation method is simple, rapid and free of secondary pollution.

Description

technical field [0001] The invention relates to the technical field of synthesis of photocatalytic materials, in particular to a visible light responsive Zn 2 SnO 4 / ZnO / SnO 2 Preparation method and application of composite photocatalytic material. Background technique [0002] In recent decades, due to the excessive use and incomplete metabolism of antibiotics, they are easy to accumulate in the environment, which may cause serious environmental pollution and endanger human health. Studies have shown that many methods have been focused on the removal of antibiotics, including adsorption, biodegradation, and semiconductor photocatalysis. Compared with traditional methods, semiconductor photocatalysis is considered as a promising technology for environmental restoration due to its advantages of high efficiency, low cost, and environmental friendliness. In recent years, photocatalytic technology has been widely used in wastewater treatment in the environment. However, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/30C02F101/38
CPCB01J23/002B01J23/14C02F1/30C02F2305/10C02F2101/38B01J35/39
Inventor 董淑英崔龄芳夏隆基张方圆田雨佳孙剑辉
Owner HENAN NORMAL UNIV
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