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A kind of ag/agbr/ga2o3 heterostructure photocatalytic material and preparation method thereof

A technology of photocatalytic materials and heterostructures, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of high recombination rate of gallium oxide carriers, and achieve easy industrial production and improvement Separation, improved separation effect

Active Publication Date: 2018-05-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of high carrier recombination rate of gallium oxide in the prior art, the present invention provides a low-cost and high-efficiency Ag / AgBr / Ga 2 o 3 Heterostructure photocatalytic material and preparation method thereof

Method used

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  • A kind of ag/agbr/ga2o3 heterostructure photocatalytic material and preparation method thereof
  • A kind of ag/agbr/ga2o3 heterostructure photocatalytic material and preparation method thereof
  • A kind of ag/agbr/ga2o3 heterostructure photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of Ag / AgBr / Ga 2 o 3 Heterostructure photocatalytic materials, made of Ga 2 o 3 , AgNO 3 and NaBr, the Ga 2 o 3 , AgNO 3 The molar ratio with NaBr is n(Ga 2 o 3 ): n(AgNO 3 ): n(NaBr)=1:2:2.

[0028] The Ag / AgBr / Ga 2 o 3 A method for preparing a heterostructure photocatalytic material, comprising the following steps:

[0029] (1) Ga 2 o 3 The powder was added to 50mL of the silver source precursor, sonicated to make Ga 2 o 3 The powder is evenly dispersed in the silver source precursor, and after the ultrasonication is completed, then magnetically stirred for 10 minutes to obtain a mixed solution; the silver source precursor is AgNO 3 Solution, its concentration is 0.1mol / L; Ga 2 o 3 The amount is proportional to n(Ga 2 o 3 ):n(AgBr)=1:2 calculation; ultrasonic time is 20min;

[0030] (2) Weigh NaBr, dissolve it in 50mL deionized water to obtain NaBr solution; add NaBr solution dropwise to the mixed solution obtained in step (1) while stirring...

Embodiment 2

[0033] A kind of Ag / AgBr / Ga 2 o 3 Heterostructure photocatalytic materials, made of Ga 2 o 3 , AgNO 3 and NaBr, the Ga 2 o 3 , AgNO 3 The molar ratio to NaBr is n(Ga 2 o 3 ): n(AgNO 3 ): n(NaBr)=1:2:2.

[0034] The Ag / AgBr / Ga 2 o 3 A method for preparing a heterostructure photocatalytic material, comprising the following steps:

[0035] (1) Ga 2 o 3 The powder was added to 50mL of the silver source precursor, sonicated to make Ga 2 o 3 The powder is evenly dispersed in the silver source precursor, and after the ultrasonication is completed, it is magnetically stirred for 30 minutes to obtain a mixed solution; the silver source precursor is AgNO 3 Solution, its concentration is 0.1mol / L; Ga 2 o 3 The amount is proportional to n(Ga 2 o 3 ):n(AgBr)=1:2 calculation; ultrasonic time is 30min;

[0036] (2) Weigh NaBr, dissolve it in 50mL deionized water to obtain NaBr solution; add NaBr solution dropwise to the mixed solution obtained in step (1) while stirring,...

Embodiment 3

[0039] A kind of Ag / AgBr / Ga 2 o 3 Heterostructure photocatalytic materials, made of Ga 2 o 3 , AgNO 3 and NaBr, the Ga 2 o 3 , AgNO 3 The molar ratio to NaBr is n(Ga 2 o 3 ): n(AgNO 3 ): n(NaBr)=1:2:2.

[0040] The Ag / AgBr / Ga 2 o 3 A method for preparing a heterostructure photocatalytic material, comprising the following steps:

[0041] (1) Ga 2 o 3 The powder was added to 50mL of the silver source precursor, sonicated to make Ga 2 o 3 The powder is evenly dispersed in the silver source precursor, and after the ultrasonic wave is completed, it is then magnetically stirred for 20 minutes to obtain a mixed solution; the silver source precursor is AgNO 3 Solution, its concentration is 0.1mol / L; Ga 2 o 3 The amount is proportional to n(Ga 2 o 3 ):n(AgBr)=1:2 calculation; ultrasonic time is 25min;

[0042] (2) Weigh NaBr, dissolve it in 50mL deionized water to obtain NaBr solution; add NaBr solution dropwise to the mixed solution obtained in step (1) while stir...

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Abstract

The invention belongs to the technical field of photocatalytic material research and development, and specifically relates to the use of an Ag / AgBr / Ga2O3 heterostructure photocatalytic material and its preparation method. An Ag / AgBr / Ga2O3 heterostructure photocatalytic material is prepared from Ga2O3, AgNO3 and NaBr. The molar ratio of Ga2O3, AgNO3 and NaBr is n(Ga2O3):n(AgNO3):n(NaBr )=1:2:2. The Ag / AgBr / Ga2O3 photocatalytic material of the present invention significantly improves the separation of photogenerated carriers and greatly improves the photocatalytic performance of the material. Under 254nm ultraviolet light irradiation, Ag / AgBr / Ga2O3 is used as a photocatalyst to degrade methyl groups. Orange, the degradation rate reaches 89% in 30 minutes; and using Ag / AgBr and Ga2O3 as catalysts, the degradation rates in 60 minutes are 74% and 48% respectively; the preparation method of the Ag / AgBr / Ga2O3 photocatalytic material of the present invention is at room temperature and normal pressure. It can be implemented, has low cost, is simple to operate, and is easy for industrial production.

Description

technical field [0001] The invention belongs to the technical field of research and development of photocatalytic materials, and specifically relates to the use of a Ag / AgBr / Ga 2 o 3 Heterostructure photocatalytic material and its preparation method. Background technique [0002] With the development of the economy, people's living standards have been continuously improved, and people's health awareness has also been continuously strengthened. The most healthy living environment has become the goal of people. In the past, the common method of sewage treatment was to add flocculants, but this method has problems such as large dosage, long reaction time, and poor treatment effect, which makes the clean, efficient, and non-secondary pollution photocatalytic technology receive more and more attention. focus on. Semiconductor-based photocatalytic technology is considered to be an ideal environmental pollution control technology because it can react at room temperature, can com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/125
CPCB01J27/125B01J35/39
Inventor 喻泽斌刘晴胡晓李明洁
Owner GUANGXI UNIV