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Compound photocatalysis material with bismuth sulfide nano particles/bismuth oxychloride and preparation method thereof

A technology of composite photocatalysis and bismuth oxychloride, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high carrier recombination rate and poor light absorption, and achieve low cost , low cost, good visible light absorption effect

Inactive Publication Date: 2012-06-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of poor light absorption and high carrier recombination rate of traditional photocatalytic materials, as well as the complication of the preparation method of bismuth sulfide nanoparticles, and provides a composite photocatalytic material of bismuth sulfide nanoparticles / bismuth oxychloride. The material has the characteristics of adjustable visible light absorption and high efficiency

Method used

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  • Compound photocatalysis material with bismuth sulfide nano particles/bismuth oxychloride and preparation method thereof
  • Compound photocatalysis material with bismuth sulfide nano particles/bismuth oxychloride and preparation method thereof
  • Compound photocatalysis material with bismuth sulfide nano particles/bismuth oxychloride and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] 0.97g of bismuth nitrate and 0.86g of 1-dodecyl-3-methylimidazole chloride were respectively dissolved in 40mL of ethylene glycol methyl ether, and magnetically stirred for 30 minutes to completely dissolve. The two solutions were then mixed and stirring was continued for 10 minutes before finally being transferred to a closed autoclave. Placed at 160°C for 2 hours to react. After cooling to room temperature, the product is collected, washed and vacuum-dried to obtain bismuth oxychloride microspheres with hierarchical structure.

[0018] (1) 0.261g bismuth oxychloride microspheres are added to the aqueous solution containing 0.075g thioacetamide, the molar ratio of bismuth oxychloride and thioacetamide is 1: 1, magnetic stirring is carried out at room temperature for 2-4 hours, and sulfur The sulfur ion produced by the decomposition of acetamide undergoes an ion exchange reaction with bismuth oxychloride to form a bismuth sulfide / bismuth oxychloride composite material....

Embodiment 2

[0020] (1) Dissolve 0.97g of bismuth nitrate and 0.86g of 1-dodecyl-3-methylimidazole chloride in 40mL of ethylene glycol methyl ether, and magnetically stir for 30 minutes to dissolve completely. The two solutions were then mixed and stirring was continued for 10 minutes before finally being transferred to a closed autoclave. Placed at 160°C for 2 hours to react. After cooling to room temperature, the product is collected, washed and vacuum-dried to obtain bismuth oxychloride microspheres with hierarchical structure.

[0021] (2) 0.261g bismuth oxychloride microspheres are added to the aqueous solution containing 0.076g thiourea, the molar ratio of bismuth oxychloride and thiourea is 1: 1, and magnetic stirring is carried out at room temperature for 2-4 hours, and thiourea decomposes to produce The ion exchange reaction between sulfur ion and bismuth oxychloride produces bismuth sulfide / bismuth oxychloride composite material.

Embodiment 3

[0023] (1) Dissolve 0.97g of bismuth nitrate and 0.86g of 1-dodecyl-3-methylimidazole chloride in 40mL of ethylene glycol methyl ether, and magnetically stir for 30 minutes to dissolve completely. The two solutions were then mixed and stirring was continued for 10 minutes before finally being transferred to a closed autoclave. Placed at 160°C for 2 hours to react. After cooling to room temperature, the product is collected, washed and vacuum-dried to obtain bismuth oxychloride microspheres with hierarchical structure.

[0024] (2) 0.261g bismuth oxychloride microspheres are added to the aqueous solution containing 0.121g cysteine, the molar ratio of bismuth oxychloride and cysteine ​​is 1: 1, magnetic stirring is carried out at room temperature for 2-4 hours, half The sulfur ion produced by the decomposition of cystine undergoes an ion exchange reaction with bismuth oxychloride to form a bismuth sulfide / bismuth oxychloride composite material.

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Abstract

The invention relates to a compound photocatalysis material with bismuth-sulfide nano particles / bismuth oxychloride and a preparation method thereof. The preparation method comprises the following steps of: firstly, dissolving bismuth nitrate and chlorinated 1-dodecyl-3-methyl glyoxaline into ethylene glycol monomethyl ether respectively, afterwards carrying out a thermal reaction by a solvent soas to prepare bismuth-oxychloride micron balls, then adding the bismuth-oxychloride micron balls into a water solution containing a sulfur source and exchanging parts of ions so as to prepare a compound photocatalysis material containing bismuth-sulfide nano particles and bismuth oxychloride. The method disclosed by the invention can be executed at room temperature and normal pressure, the cost is low, and equipment is simple and is easy to operate; and moreover, the compound photocatalysis material with the bismuth-sulfide nano particles / bismuth oxychloride can be produced at a large scale and has important potential application in the aspect of industrial production. The prepared compound photocatalysis material with the bismuth sulfide / bismuth oxychloride has favorable absorption of visible light, the separation of a photon-generated carrier is obviously improved, and the photocatalysis performance of the material is greatly enhanced.

Description

technical field [0001] The invention relates to a novel bismuth sulfide nanoparticle / bismuth oxychloride composite photocatalytic material with visible light response and a preparation method thereof, belonging to the technical field of photocatalytic material preparation. Background technique [0002] Due to a series of novel physical and chemical properties, semiconductor nanoparticles have aroused widespread interest in the fields of energy conversion, supercapacitors and catalysis. Among them, narrow bandgap semiconductor nanoparticles / quantum dots have obvious quantum size effect, and the energy gap of the semiconductor is changed with the change of particle size, thereby fully absorbing sunlight. Combining narrow-bandgap semiconductor nanoparticles with wide-bandgap semiconductors (such as titanium dioxide), using the quantum size effect of narrow-bandgap semiconductors can make the composite material effectively absorb visible light and facilitate charge transfer betw...

Claims

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Application Information

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IPC IPC(8): B01J27/06
Inventor 黄柏标程合锋秦晓燕张晓阳
Owner SHANDONG UNIV
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