Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn2S4-Ti3C2Tx Schottky heterojunction: An experimental and mechanism study

Zhihao Zhuge; Xinjuan Liu; Taiqiang Chen; Yinyan Gong; Can Li; Lengyuan Niu; Shiqing Xu; Xingtao Xu; Zeid A. Alothman; Chang Q. Sun; Joseph G. Shapter; Yusuke Yamauchi

doi:10.1016/j.cej.2020.127838

Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn₂S₄-Ti₃C₂T_x Schottky heterojunction: An experimental and mechanism study

Zhihao Zhuge, Xinjuan Liu, Taiqiang Chen, Yinyan Gong, Can Li, Lengyuan Niu, Shiqing Xu, Xingtao Xu, Zeid A. Alothman, Chang Q. Sun, Joseph G. Shapter, Yusuke Yamauchi

College of Life Sciences

Research output: Contribution to journal › Article › peer-review

154 Citations (Scopus)

Abstract

The low charge transfer efficiency of isolated semiconductors is an urgent challenge in the photocatalytic degradation of hazardous contaminants. In this work, CaIn₂S₄/MXene Ti₃C₂T_x Schottky heterojunctions are synthesized via a simple hydrothermal method and applied for tetracycline hydrochloride degradation and Cr(VI) reduction. Results show that Ti₃C₂T_x as a cocatalyst can limit the charge recombination and boost the absorption of visible light, thus promoting the photocatalytic efficiency of pure CaIn₂S₄. An optimized CaIn₂S₄-Ti₃C₂T_x hybrid has the highest catalytic rate in the degradation of tetracycline hydrochloride (96%) and reduction of Cr(VI) (98%). Studies probing the mechanism indicate that the photogenerated superoxide radicals and holes play a key role in the tetracycline hydrochloride degradation process, while electrons are core to the Cr(VI) reduction reaction. Besides the high photocatalytic efficiency, the CaIn₂S₄-Ti₃C₂T_x hybrids also exhibit outstanding photo-stability in the present conditions, suggesting the potential for practical use.

Original language	English
Article number	127838
Journal	Chemical Engineering Journal
Volume	421
DOIs	https://doi.org/10.1016/j.cej.2020.127838
Publication status	Published - 1 Oct 2021

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

CaInS
Charge separation
Co-catalyst
MXene
Schottky heterojunction

Access to Document

10.1016/j.cej.2020.127838

Cite this

Zhuge, Z., Liu, X., Chen, T., Gong, Y., Li, C., Niu, L., Xu, S., Xu, X., Alothman, Z. A., Sun, C. Q., Shapter, J. G., & Yamauchi, Y. (2021). Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn₂S₄-Ti₃C₂T_x Schottky heterojunction: An experimental and mechanism study. Chemical Engineering Journal, 421, Article 127838. https://doi.org/10.1016/j.cej.2020.127838

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title = "Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn2S4-Ti3C2Tx Schottky heterojunction: An experimental and mechanism study",

abstract = "The low charge transfer efficiency of isolated semiconductors is an urgent challenge in the photocatalytic degradation of hazardous contaminants. In this work, CaIn2S4/MXene Ti3C2Tx Schottky heterojunctions are synthesized via a simple hydrothermal method and applied for tetracycline hydrochloride degradation and Cr(VI) reduction. Results show that Ti3C2Tx as a cocatalyst can limit the charge recombination and boost the absorption of visible light, thus promoting the photocatalytic efficiency of pure CaIn2S4. An optimized CaIn2S4-Ti3C2Tx hybrid has the highest catalytic rate in the degradation of tetracycline hydrochloride (96%) and reduction of Cr(VI) (98%). Studies probing the mechanism indicate that the photogenerated superoxide radicals and holes play a key role in the tetracycline hydrochloride degradation process, while electrons are core to the Cr(VI) reduction reaction. Besides the high photocatalytic efficiency, the CaIn2S4-Ti3C2Tx hybrids also exhibit outstanding photo-stability in the present conditions, suggesting the potential for practical use.",

keywords = "CaInS, Charge separation, Co-catalyst, MXene, Schottky heterojunction",

author = "Zhihao Zhuge and Xinjuan Liu and Taiqiang Chen and Yinyan Gong and Can Li and Lengyuan Niu and Shiqing Xu and Xingtao Xu and Alothman, {Zeid A.} and Sun, {Chang Q.} and Shapter, {Joseph G.} and Yusuke Yamauchi",

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year = "2021",

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doi = "10.1016/j.cej.2020.127838",

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Zhuge, Z, Liu, X, Chen, T, Gong, Y, Li, C, Niu, L, Xu, S, Xu, X, Alothman, ZA, Sun, CQ, Shapter, JG & Yamauchi, Y 2021, 'Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn₂S₄-Ti₃C₂T_x Schottky heterojunction: An experimental and mechanism study', Chemical Engineering Journal, vol. 421, 127838. https://doi.org/10.1016/j.cej.2020.127838

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T1 - Highly efficient photocatalytic degradation of different hazardous contaminants by CaIn2S4-Ti3C2Tx Schottky heterojunction

T2 - An experimental and mechanism study

AU - Zhuge, Zhihao

AU - Liu, Xinjuan

AU - Chen, Taiqiang

AU - Gong, Yinyan

AU - Li, Can

AU - Niu, Lengyuan

AU - Xu, Shiqing

AU - Xu, Xingtao

AU - Alothman, Zeid A.

AU - Sun, Chang Q.

AU - Shapter, Joseph G.

AU - Yamauchi, Yusuke

PY - 2021/10/1

Y1 - 2021/10/1

N2 - The low charge transfer efficiency of isolated semiconductors is an urgent challenge in the photocatalytic degradation of hazardous contaminants. In this work, CaIn2S4/MXene Ti3C2Tx Schottky heterojunctions are synthesized via a simple hydrothermal method and applied for tetracycline hydrochloride degradation and Cr(VI) reduction. Results show that Ti3C2Tx as a cocatalyst can limit the charge recombination and boost the absorption of visible light, thus promoting the photocatalytic efficiency of pure CaIn2S4. An optimized CaIn2S4-Ti3C2Tx hybrid has the highest catalytic rate in the degradation of tetracycline hydrochloride (96%) and reduction of Cr(VI) (98%). Studies probing the mechanism indicate that the photogenerated superoxide radicals and holes play a key role in the tetracycline hydrochloride degradation process, while electrons are core to the Cr(VI) reduction reaction. Besides the high photocatalytic efficiency, the CaIn2S4-Ti3C2Tx hybrids also exhibit outstanding photo-stability in the present conditions, suggesting the potential for practical use.

AB - The low charge transfer efficiency of isolated semiconductors is an urgent challenge in the photocatalytic degradation of hazardous contaminants. In this work, CaIn2S4/MXene Ti3C2Tx Schottky heterojunctions are synthesized via a simple hydrothermal method and applied for tetracycline hydrochloride degradation and Cr(VI) reduction. Results show that Ti3C2Tx as a cocatalyst can limit the charge recombination and boost the absorption of visible light, thus promoting the photocatalytic efficiency of pure CaIn2S4. An optimized CaIn2S4-Ti3C2Tx hybrid has the highest catalytic rate in the degradation of tetracycline hydrochloride (96%) and reduction of Cr(VI) (98%). Studies probing the mechanism indicate that the photogenerated superoxide radicals and holes play a key role in the tetracycline hydrochloride degradation process, while electrons are core to the Cr(VI) reduction reaction. Besides the high photocatalytic efficiency, the CaIn2S4-Ti3C2Tx hybrids also exhibit outstanding photo-stability in the present conditions, suggesting the potential for practical use.

KW - CaInS

KW - Charge separation

KW - Co-catalyst

KW - MXene

KW - Schottky heterojunction

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