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Method for preparing Bi2S3/BiOCl heterojunction photocatalyst

A photocatalyst and heterojunction technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of simple operation, simple preparation operation parameters and low cost

Active Publication Date: 2013-09-25
扬州天诗化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of Bi2S3 / BiOCl heterojunction photocatalysts using triethylenetetramine-type ionic liquids has not been reported in the literature

Method used

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  • Method for preparing Bi2S3/BiOCl heterojunction photocatalyst
  • Method for preparing Bi2S3/BiOCl heterojunction photocatalyst
  • Method for preparing Bi2S3/BiOCl heterojunction photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Add 50g of triethylenetetramine into 200mL of deionized water and stir to dissolve, weigh diethyl sulfate at a molar ratio of 1:1 and slowly add it dropwise to the aqueous solution of triethylenetetramine, stir to cause neutralization reaction . An ice bath was set during the reaction process to prevent the solution from volatilizing due to exothermic heat. After continuing to stir for 6 hours, the water in the mixed solution was evaporated by a rotary evaporator to obtain a triethylenetetramine diethyl sulfate ionic liquid.

[0031] (2) Preparation of chlorine-containing imidazole ionic liquid: Weigh 40.1799g of imidazole into a three-necked flask, then add 48.12g of hydrochloric acid (37%) dropwise into the imidazole solution under stirring, and stir at 50°C for 3h. The imidazolium chloride ionic liquid was obtained by separation with a rotary evaporator.

[0032](3) Preparation of BiOCl: Dissolve 2.4257g of bismuth nitrate in 20ml of deionized water, dissolve 0...

Embodiment 2

[0035] (1) Add 50g of triethylenetetramine into 200mL of deionized water and stir to dissolve, weigh diethyl sulfate at a molar ratio of 1:1 and slowly add it dropwise to the aqueous solution of triethylenetetramine, stir to cause neutralization reaction . An ice bath was set during the reaction process to prevent the solution from volatilizing due to exothermic heat. After continuing to stir for 6 hours, the water in the mixed solution was evaporated by a rotary evaporator to obtain a triethylenetetramine diethyl sulfate ionic liquid.

[0036] (2) Preparation of chlorine-containing imidazole ionic liquid: Weigh 40.1799g of imidazole in a three-necked flask, add 50ml of water to dissolve, then take 48.12g of hydrochloric acid (37%) and add dropwise to the imidazole solution under stirring, 50 Stir at ℃ for 3h. Use a rotary evaporator to separate impurities such as water to obtain an imidazolium chloride ionic liquid.

[0037] (3) Preparation of BiOCl: Dissolve 2.4257g of bis...

Embodiment 3

[0040] (1) Add 60g of triethylenetetramine to 200mL of deionized water and stir to dissolve, weigh diethyl sulfate at a molar ratio of 1:1 and slowly add it dropwise to the aqueous solution of triethylenetetramine, stir to cause a neutralization reaction . An ice bath was set during the reaction process to prevent the solution from volatilizing due to exothermic heat. After continuing to stir for 6 hours, the water in the mixed solution was evaporated by a rotary evaporator to obtain a triethylenetetramine diethyl sulfate ionic liquid.

[0041] (2) Preparation of chlorine-containing imidazole ionic liquid: Weigh 40g of imidazole into a three-necked flask, add 50ml of water to dissolve, then take 48g of hydrochloric acid (37%) and add dropwise to the imidazole solution under stirring. Stir for 3h. Use a rotary evaporator to separate impurities such as water to obtain an imidazolium chloride ionic liquid.

[0042] (3) Preparation of BiOCl: Dissolve 2.4257g of bismuth nitrate i...

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Abstract

The invention belongs to the preparation field of inorganic material bismuth oxychloride heterojunction photocatalysts and particularly relates to a method for preparing a Bi2S3 / BiOCl heterojunction photocatalyst. The method comprises the following steps of: (1) dropwise adding diethyl sulfate water solution into triethylene tetramine water solution to carry out neutral reaction, stirring, and removing water out of the mixed liquid, so as to prepare triethylene tetramine diethyl sulfate type ionic liquid; (2) dissolving imidazole in water, then dropwise adding hydrochloric acid, and separating out imidazole chloride ion liquid; (3) dissolving bismuth nitrate in deionized water, additionally dissolving imidazole chloride in the deionized water, dropwise adding prepared imidazole chloride water solution into bismuth nitrate water solution, and separating to obtain BiOCl; and (4) preparing triethylene tetramine diethyl sulfate type ionic liquid water solution, and dissolving the BiOCl and thioacetamide into the water solution, so as to prepare Bi2S3 / BiOCl. The photocatalyst disclosed by the invention has good activity, low cost and high purity and can be produced in large scale.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic material bismuth oxychloride (BiOCl) heterojunction photocatalyst, in particular to a kind of combined preparation of Bi by ionic liquid and ultrasonic 2 S 3 / BiOCl heterojunction photocatalyst approach. Background technique [0002] Bismuth oxychloride is a new type of photocatalyst, which has better catalytic activity than commercial P25 under the irradiation of ultraviolet light. However, due to its wide bandgap width (3.5eV), it can only absorb ultraviolet light with a relatively low content in sunlight, which affects its function. [0003] Combining two kinds of semiconductors with matching energy band structures is an effective way to solve the low catalytic activity of single semiconductor catalysts. Its advantages are: (1) It can effectively reduce the recombination of electron-hole pairs; (2) It can increase the operating cycle of carriers; (3) It can increase the amount of sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10
Inventor 赵荣祥李秀萍
Owner 扬州天诗化工科技有限公司
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