Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation

doi:10.1007/s40242-020-0083-5

高等学校化学研究 ›› 2020, Vol. 36 ›› Issue (6): 1032-1038.doi: 10.1007/s40242-020-0083-5

Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation

ZHU Yuxin, JIANG Xing, LIN Lin, WANG Shuhua, CHEN Chao

Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang 330031 P. R. China

收稿日期:2020-03-30 修回日期:2020-05-14 出版日期:2020-12-01 发布日期:2020-05-20
通讯作者: WANG Shuhua, CHEN Chao E-mail:shwang@ncu.edu.cn;chaochen@ncu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos.21661020, 21961021).

Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation

ZHU Yuxin, JIANG Xing, LIN Lin, WANG Shuhua, CHEN Chao

Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang 330031 P. R. China

Received:2020-03-30 Revised:2020-05-14 Online:2020-12-01 Published:2020-05-20
Contact: WANG Shuhua, CHEN Chao E-mail:shwang@ncu.edu.cn;chaochen@ncu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21661020, 21961021).

摘要/Abstract

摘要： A new ZnS/CdS heterojunction is constructed through the direct sulfurization of a metal ions exchanged Zn/Cd-MOF precursor(MOF=metal-organic framework material). The composition, structure, morphology, photo-absorption and photoelectric performance of the ZnS/CdS are characterized by powder X-ray diffraction(PXRD), scanning electron microscope(SEM), transmission electron microscope(TEM), diffuse reflection spectrum(DRS), photoelectric current(PEC), electrochemical impedance spectroscopy(EIS) and photoluminescence(PL) technologies. Since the metal ions are highly orderly separated by the organic ligands and the inherent porosity of the Zn/Cd-MOF, the as-synthesized ZnS/CdS possesses a large surface area and intimate contact at the heterogeneous interface with uniform ZnS/CdS nanoparticles. The photocatalytic hydrogen evolution activity of the ZnS/CdS is investigated under visible light irradiation(λ ≥ 420 nm). It exhibits enhanced photocatalytic performance that the optimal ZnS/CdS achieves a maximum average hydrogen production rate of 2348 μmol·h^-1·g^-1. A possible electron transfer mechanism is therefore proposed by the analyses of the Mott-Schottky plots.

关键词: ZnS/CdS heterojunction, Zn/Cd-MOF precursor, Photocatalytic hydrogen evolution

Abstract: A new ZnS/CdS heterojunction is constructed through the direct sulfurization of a metal ions exchanged Zn/Cd-MOF precursor(MOF=metal-organic framework material). The composition, structure, morphology, photo-absorption and photoelectric performance of the ZnS/CdS are characterized by powder X-ray diffraction(PXRD), scanning electron microscope(SEM), transmission electron microscope(TEM), diffuse reflection spectrum(DRS), photoelectric current(PEC), electrochemical impedance spectroscopy(EIS) and photoluminescence(PL) technologies. Since the metal ions are highly orderly separated by the organic ligands and the inherent porosity of the Zn/Cd-MOF, the as-synthesized ZnS/CdS possesses a large surface area and intimate contact at the heterogeneous interface with uniform ZnS/CdS nanoparticles. The photocatalytic hydrogen evolution activity of the ZnS/CdS is investigated under visible light irradiation(λ ≥ 420 nm). It exhibits enhanced photocatalytic performance that the optimal ZnS/CdS achieves a maximum average hydrogen production rate of 2348 μmol·h^-1·g^-1. A possible electron transfer mechanism is therefore proposed by the analyses of the Mott-Schottky plots.

Key words: ZnS/CdS heterojunction, Zn/Cd-MOF precursor, Photocatalytic hydrogen evolution

ZHU Yuxin, JIANG Xing, LIN Lin, WANG Shuhua, CHEN Chao. Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation[J]. 高等学校化学研究, 2020, 36(6): 1032-1038.

ZHU Yuxin, JIANG Xing, LIN Lin, WANG Shuhua, CHEN Chao. Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation[J]. Chemical Research in Chinese Universities, 2020, 36(6): 1032-1038.

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Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation

Fabrication of ZnS/CdS Heterojunction by Using Bimetallic MOFs Template for Photocatalytic Hydrogen Generation

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