Synergistic Interaction of S-Type Heterojunction and Sulfur Vacancies in G-C3n5@Sv-Znin2s4 Composites: Simultaneous Promotion of Complete 2,4-Dichlorophenol Mineralization and Cr(Vi) Reduction

39 Pages Posted: 13 Aug 2024

See all articles by Ying Zeng

Ying Zeng

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology

Sitong Liu

affiliation not provided to SSRN

Guopeng Zhu

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology

Quanying Wang

affiliation not provided to SSRN

Xiutao Yang

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology

Hongwen Yu

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology

Abstract

Constructing efficient heterojunction photocatalysts is an effective measure for degrading pesticides and reducing heavy metals. In this study, g-C3N5@Sv-ZnIn2S4 (g-C3N5@Sv-ZIS) composite with large specific surface area has been successfully prepared by a simple low-temperature water bath method. The g-C3N5@Sv-ZIS composite showed complete mineralization of 2,4-dichlorophenol (2,4-DCP) and reduction of Cr(VI) within 60 min. The results of electron spin resonance spectroscopy, photoelectrochemical characterization, and energy band structure calculations indicated the formation of an S-type heterojunction at the interface of g-C3N5 and Sv-ZIS. In situ XPS analysis showed the transfer of photogenerated charges from g-C3N5 to Sv-ZIS. The molecular structure of 2,4-DCP was analyzed using frontier molecular orbital and electrostatic potential calculations. The possible degradation pathways of 2,4-DCP were proposed based on liquid chromatography– mass spectrometry results. Biotoxicity simulations of the intermediates revealed decreased toxicities. Furthermore, the catalytic properties of the composites were examined in the context of real simulated effluents. The composites designed in this study provide reliable theoretical support for the removal of composite pollutants.

Keywords: g-C3N5@Sv-ZnIn2S4, Molten salt template method, S-type heterojunction, In situ XPS, Synergetic interaction

Suggested Citation

Zeng, Ying and Liu, Sitong and Zhu, Guopeng and Wang, Quanying and Yang, Xiutao and Yu, Hongwen, Synergistic Interaction of S-Type Heterojunction and Sulfur Vacancies in G-C3n5@Sv-Znin2s4 Composites: Simultaneous Promotion of Complete 2,4-Dichlorophenol Mineralization and Cr(Vi) Reduction. Available at SSRN: https://ssrn.com/abstract=4924295

Ying Zeng

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology ( email )

4888 Shengbei Rd
Changchun 130102
China

Sitong Liu

affiliation not provided to SSRN ( email )

Guopeng Zhu

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology ( email )

4888 Shengbei Rd
Changchun 130102
China

Quanying Wang

affiliation not provided to SSRN ( email )

Xiutao Yang

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology ( email )

4888 Shengbei Rd
Changchun 130102
China

Hongwen Yu (Contact Author)

Chinese Academy of Sciences (CAS) - Northeast Institute of Geography and Agroecology ( email )

4888 Shengbei Rd
Changchun 130102
China

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