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a kind of agins 2 /bi 2 the w 6 Preparation method and application of heterojunction nanosheets

A nanosheet and heterojunction technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve the problems of poor stability of binary sulfides, easy photocorrosion, and limited development. , to achieve the effect of easy operation, simple process and improved ability

Active Publication Date: 2020-04-14
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the deepening of research, most binary sulfides have poor stability and are prone to photocorrosion, which limits their development.

Method used

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  • a kind of agins <sub>2</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method and application of heterojunction nanosheets
  • a kind of agins <sub>2</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method and application of heterojunction nanosheets
  • a kind of agins <sub>2</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method and application of heterojunction nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.2g AgNO 3 Dissolve in 96mL water to form AgNO 3 solution; 0.22g InCl 3 Add to AgNO 3 After mixing in the solution, add 0.19g of thiourea and stir for 30min to form a transparent and uniform solution. Add 1.37g of synthesized Bi 2 WO 6 The above solution was added and stirred for 30 minutes. The solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, pressurized to 1.45atm, placed in an oven for hydrothermal reaction at 160°C for 12h, and cooled naturally to room temperature. Centrifuge and collect the bottom precipitate, wash with deionized water and then with absolute ethanol, and dry at 80°C for 12h to obtain 30% AgInS 2 / Bi 2 WO 6 heterojunction nanosheets. from figure 1 AgInS can be clearly shown on 2 / Bi 2 WO 6 presents flakes, from figure 2 It can be seen that in the visible light range AgInS 2 / Bi 2 WO 6 Has strong absorption.

Embodiment 2

[0031] 0.2gAgNO 3 Dissolve in 96mL ethanol to form AgNO 3 solution; 0.22g InCl 3 Add to AgNO 3 After mixing in the solution, add 0.19g of thiourea and stir for 30min to form a transparent and uniform solution. Add 0.46g of synthesized Bi 2 WO 6 The above solution was added and stirred for 30 minutes. The solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, pressurized to 1.40atm, placed in an oven for hydrothermal reaction at 120°C for 48h, and cooled to room temperature naturally. Centrifuge and collect the brick-red precipitate at the bottom, wash with deionized water and then with absolute ethanol, and dry at 80°C for 12h to obtain 10% AgInS 2 / Bi 2 WO 6 heterojunction nanosheets.

Embodiment 3

[0033] 0.2gAgNO 3 Dissolve in 96mL ethanol to form AgNO 3 solution; 0.22g InCl 3 Add to AgNO 3 After mixing in the solution, add 0.19g of thiourea, stir for 30min to form a transparent and uniform solution, and 2.29g of synthesized Bi 2 WO 6 The above solution was added and stirred for 30 minutes. The solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, pressurized to 1.32atm, placed in an oven for hydrothermal reaction at 200°C for 6h, and cooled to room temperature naturally. Centrifuge and collect the brick-red precipitate at the bottom, wash with deionized water and then with absolute ethanol, and dry at 80°C for 12h to obtain 50% AgInS 2 / Bi 2 WO 6 heterojunction nanosheets.

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Abstract

The invention relates to a kind of AgInS 2 / Bi 2 WO 6 Preparation methods and applications of heterojunction nanosheets. An equal molar ratio of AgNO 3 andInCl 3 Mixed with Thiourea, Bi 2 WO 6 The microstructure obtained by the hydrothermal reaction is a material with a sheet-like nanoscale heterojunction structure. The AgInS 2 / Bi 2 WO 6 Heterojunction nanosheets are used in catalytic degradation of pollutants. AgInS of the present invention 2 / Bi 2 WO 6 Heterojunction nanosheets have a small band gap, and because their microstructure is flake-like, the prepared materials have a large specific surface area and strong adsorption capacity; they have great ability in photocatalytic oxidation and degradation of organic pollutants. The improvement has better visible light absorption performance; the process is relatively simple and easy to operate, and it can be applied to industrial production.

Description

technical field [0001] The invention relates to a semiconductor photocatalyst for controlling environmental pollution. Background technique [0002] Energy crisis and environmental problems are two serious problems that human beings must face. How to effectively control and control the pollution of various chemical pollutants to the environment is the focus of comprehensive environmental management. In recent years, semiconductor photocatalytic oxidation technology, one of the advanced oxidation technologies, is being extensively studied by scholars at home and abroad. This technology can use solar energy as energy to degrade pollutants in the environment, effectively use solar energy, and reduce people's Energy use. [0003] Semiconductor photocatalytic oxidation technology began when Japanese scientists Fujishima and Honda discovered TiO irradiated by light 2 Single crystal electrodes can convert H 2 O decomposition, using TiO 2 The conversion of light energy into elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/047C02F1/30C02F101/34
CPCC02F1/30B01J27/047C02F2101/345C02F2305/10B01J35/39
Inventor 邹学军李思佳苑承禹于一鸣
Owner DALIAN NATIONALITIES UNIVERSITY
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