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Preparation method for Bi2S3/SnS2/Bi2O3 three-component composite photocatalyst capable of effectively degrading dye wastewater

A ternary composite, dye wastewater technology, applied in physical/chemical process catalysts, energy wastewater treatment, chemical instruments and methods, etc., to achieve the effect of strong market application value, stable performance, and wide absorption spectrum range

Inactive Publication Date: 2017-10-03
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bi 2 S 3 has been shown to be active at visible light with a bandgap energy of 1.3eV, however pure Bi 2 S 3 Practical applications of photocatalysts are limited by the rapid recombination of photogenerated electron-hole pairs

Method used

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  • Preparation method for Bi2S3/SnS2/Bi2O3 three-component composite photocatalyst capable of effectively degrading dye wastewater
  • Preparation method for Bi2S3/SnS2/Bi2O3 three-component composite photocatalyst capable of effectively degrading dye wastewater

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Experimental program
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Effect test

Embodiment 1

[0012] 1mM Bi(NO 3 ) 3 ·5H 2 O was dissolved in a mixed solution of 30mL ethanol and glycerol, then 3mM thiourea was added to the above solution and stirred magnetically for 40min, then the mixed solution was transferred to a polytetrafluoroethylene reactor at 180°C for reaction, after the reaction was completed Naturally cooled to room temperature, separated by filtration, washed three times with water and ethanol, then dried, and finally calcined at 280°C to obtain Bi 2 S 3 Photocatalyst (BiS-0 for short). After 90min of 350W Xe light irradiation, Bi 2 S 3 The photocatalyst can degrade 30% of RhB under simulated sunlight conditions.

Embodiment 2

[0014] 1mM Bi(NO 3 ) 3 ·5H 2 O was dissolved in a mixed solution of 30mL ethanol and glycerol, then 3mM thiourea was added to the above solution and magnetically stirred for 40min, then a certain amount (0.03mM, 0.05mM, 0.1mM, 0.15mM, 0.2mM or 0.25mM) SnCl 4 ·5H 2 O was dispersed in the above solution and continued magnetic stirring, and then the mixed solution was transferred to a polytetrafluoroethylene reactor at 180°C for reaction. After the reaction was completed, it was naturally cooled to room temperature, filtered and separated, washed with water and ethanol three times, then dried, and finally placed in Calcined at 280°C to get Bi 2 S 3 / SnS 2 / Bi 2 o 3 Ternary composite photocatalysts (abbreviated as BiS-1, BiS-2, BiS-3, BiS-4, BiS-5 and BiS-6, respectively). After 90min of 350W Xe light irradiation, the Bi with the best effect 2 S 3 / SnS 2 / Bi 2 o 3 The degradation rate of RhB by ternary composite photocatalyst under simulated sunlight conditions is hi...

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Abstract

The invention discloses a preparation method for a Bi2S3 / SnS2 / Bi2O3 three-component composite photocatalyst capable of effectively degrading dye wastewater. The preparation method comprises the following steps: dissolving Bi(NO3)3.5H2O in a mixed solution of ethanol and glycerol so as to obtain a solution A; then adding thiourea into the solution A and carrying out magnetic stirring for 40 min so as to obtain a solution B; dispersing SnCl4.5H2O in the solution B and continuing magnetic stirring so as to obtain a solution C; then transferring the solution C into a polytetrafluoroethylene reaction vessel and carrying out a reaction at 180 DEG C; carrying out natural cooling to room temperature after completion of the reaction and carrying out filtering and separation; separately carrying out washing with water three times and washing with ethanol three times and then carrying out drying; and finally, carrying out calcining at 280 DEG C so as to obtain the Bi2S3 / SnS2 / Bi2O3 three-component composite photocatalyst. The Bi2S3 / SnS2 / Bi2O3 three-component heterojunction composite photocatalyst prepared by using the simple method has excellent photocatalytic activity; and the three-component composite photocatalyst has excellent properties like a wide absorption spectrum range, stable performance, no toxicity, high efficiency and low price, is applicable to degradation of organic pollutants difficult to biodegrade and has good market application value.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photocatalytic materials, in particular to a Bi 2 S 3 / SnS 2 / Bi 2 o 3 Preparation method of ternary composite photocatalyst. Background technique [0002] Dye wastewater is organic wastewater with complex components and difficult to biodegrade. The effective treatment and disposal of dye wastewater is a hot spot for researchers. In the technology of degrading dye wastewater, nano-semiconductor photocatalytic oxidation technology has attracted increasing attention. Bismuth sulfide (Bi 2 S 3 ) has attracted much attention due to its wide applications in different fields, such as water treatment, energy storage, and electrochemical sensing, etc. Bi 2 S 3 has been shown to be active at visible light with a bandgap energy of 1.3eV, however pure Bi 2 S 3 The practical application of photocatalysts is limited by the rapid recombination of photogenerated electron-hole pairs. To solve th...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C02F1/30C02F101/30
CPCC02F1/30B01J27/04C02F2305/10C02F2101/308B01J35/39B01J35/00B01J35/30Y02W10/37
Inventor 孙剑辉禹崇菲董淑英谭露铁璐娜王珂杨鹏艳赵瑾
Owner HENAN NORMAL UNIV
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