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Preparation method and application of visible-light responsive g-C3N4/Bi2S3 heterojunction material

A visible light and heterojunction technology, applied in chemical instruments and methods, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as easy agglomeration, high electron load rate, limitations, etc., and achieve the preparation process Simple, long life, low cost effect

Inactive Publication Date: 2017-02-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its photocorrosion, easy agglomeration and high electron loading rate, its application has been greatly limited.

Method used

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  • Preparation method and application of visible-light responsive g-C3N4/Bi2S3 heterojunction material
  • Preparation method and application of visible-light responsive g-C3N4/Bi2S3 heterojunction material
  • Preparation method and application of visible-light responsive g-C3N4/Bi2S3 heterojunction material

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Experimental program
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Effect test

Embodiment 1

[0025] Prepare g-C 3 N 4 / Bi 2 S 3 Heterojunction Materials:

[0026] Add 0.16g of carbon nitride into 15mL of deionized water, stir and ultrasonically disperse for 1 hour, then add 0.242g of bismuth nitrate hexahydrate, stir evenly, then add 0.18g of L-cysteine, ultrasonically disperse for 5min, and dissolve the reactant After mixing evenly, transfer the reaction solution into a 50mL stainless steel autoclave, heat it at a constant temperature of 140°C, react for 24h, cool it down to room temperature naturally, wash it with deionized water and absolute ethanol three times respectively, and dry it under vacuum at 60°C for 10h. get the g-C 3 N 4 / Bi 2 S 3 heterojunction materials. The material can degrade 93% of Rhodamine B in 100 minutes under visible light irradiation.

[0027] Preparation of monomeric Bi 2 S 3 :

[0028] Add 0.242g of bismuth nitrate hexahydrate into 20mL of deionized water, stir evenly, then add 0.18g of L-cysteine, ultrasonically disperse for 5...

Embodiment 2

[0033] Add 0.24g of carbon nitride into 20mL of deionized water, and ultrasonically disperse for 1 hour after stirring, then add 0.48g of bismuth nitrate hexahydrate, stir evenly, then add 0.25g of L-cysteine, and ultrasonically disperse for 5min. After mixing evenly, transfer the reaction solution into a 50mL stainless steel autoclave, heat it at a constant temperature of 130°C, react for 12h, and cool it down to room temperature naturally, wash it with deionized water and absolute ethanol three times respectively, and dry it under vacuum at 60°C for 6h, namely get the g-C 3 N 4 / Bi 2 S 3 heterojunction materials. The material can degrade 80% of rhodamine B in 100min under visible light irradiation.

Embodiment 3

[0035] Add 0.10g of carbon nitride into 20mL of deionized water, stir and ultrasonically disperse for 0.5h, then add 0.20g of bismuth nitrate hexahydrate, stir evenly, then add 0.14g of L-cysteine, ultrasonically disperse for 3min, and the reaction After the mixture was evenly mixed, the reaction solution was transferred into a 50mL stainless steel autoclave, heated at a constant temperature of 120°C, reacted for 24 hours, cooled to room temperature naturally, washed with deionized water and absolute ethanol three times respectively, and dried under vacuum at 60°C for 6 hours. That is, get the g-C 3 N 4 / Bi 2 S 3 heterojunction materials. The material can degrade 86% of rhodamine B in 100min under visible light irradiation.

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Abstract

The invention belongs to the technical field of material synthesis, and in particular relates to a preparation method and application of a visible-light responsive g-C3N4 / Bi2S3 heterojunction material. According to the invention, a Bi2S3 nanoparticles loaded graphite type C3N4 heterojunction photocatalyst is synthesized through a simple solvothermal method, and can be used for degrading rhodamine B under visible light. The preparation method of the visible-light responsive g-C3N4 / Bi2S3 heterojunction material has the advantages that the preparation process is simple and convenient, the cost is low, and the prepared catalyst has good environmental stability, and is easy to realize large-scale industrial production. The metal sulfide, namely Bi2S3 is compounded with a nonmetal catalyst, namely g-C3N4 to form heterojunctions, so that the transmission of photoinduced electrons and holes can be greatly promoted to obviously improve the visible light photocatalytic activity of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to a visible light response g-C 3 N 4 / Bi 2 S 3 Preparation methods and uses of heterojunction materials. Background technique [0002] With the economic growth, the deteriorating environmental problems become particularly prominent. From the perspective of energy and environmental restoration, photocatalytic technology using semiconductors and their derivative materials as a medium can use clean and sustainable solar energy to treat toxic substances such as waste water and waste gas in the environment, and thus has attracted more and more attention from the society. In recent years, with the unremitting efforts of scientific researchers, photocatalytic technology has been widely used in wastewater treatment in the environment. However, the design and development of high-performance visible light-responsive photocatalytic materials is still of great signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J27/24C02F2305/10C02F2101/308B01J35/39Y02W10/37
Inventor 朱成章谢吉民姜志锋魏巍
Owner JIANGSU UNIV
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