Constructing ZnIn2S4@WO3•H2O Z-type heterojunction to boost photocatalytic efficiency under visible-light irradiation

被引:4
作者
Ma, Ligang [1 ]
Yang, Yuqing [2 ]
Zhu, Tianyu [1 ]
Ding, Yihuan [1 ]
Lin, Chao [1 ]
Xu, Le [2 ]
Ai, Xiaoqian [2 ]
机构
[1] Nanjing Xiaozhuang Univ, Sch Elect Engn, Nanjing 211171, Peoples R China
[2] Jiangsu Second Normal Univ, Sch Phys & Elect Informat, Nanjing 210013, Peoples R China
基金
中国国家自然科学基金;
关键词
Z-type heterojunction; Photodegradation; Z-SCHEME PHOTOCATALYST; HYDROGEN-PRODUCTION; CHARGE-TRANSFER; HETEROSTRUCTURE; ZNIN2S4; ENERGY; BOND; CU;
D O I
10.1016/j.mtcomm.2024.110009
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, hexagonal ZnIn2S4 2 S 4 nanoflowers were grown in situ on tetragonal WO3 center dot H2O 3 center dot H 2 O nanosheets, yielding a compact ZnIn2S4@WO3 center dot H2O 2 S 4 @WO 3 center dot H 2 O (ZIS@WO) core-shell heterojunction. The formation of the ZIS@WO heterojunction was optimized by meticulously adjusting the quantity of WO3 center dot H2O 3 center dot H 2 O nanosheets incorporated. The crystal structure and microstructure of ZIS@WO were comprehensively examined using XRD, TEM and EDS analyses. The photocatalytic properties of ZIS@WO heterojunctions were evaluated through the degradation of organic pollutants under visible light irradiation. The results demonstrated a marked enhancement in photocatalytic efficiency for the ZIS@WO heterojunction. Further investigation into the separation and transport of photogenerated carriers were performed using PL spectroscopy and photoelectrochemical measurement. Compared to the individual components of ZnIn2S4 2 S 4 nanoflowers and WO3 center dot H2O 3 center dot H 2 O nanosheets, the ZIS@WO heterojunction creates an internal electric field at the interface, along with a compact core-shell configuration. This internal electric field, in conjunction with the band structure of the heterojunction, effectively accelerates the separation of photo- generated electrons and holes. Additionally, a comprehensive analysis of the photocatalytic degradation mechanisms were presented, elucidating the intricate processes.
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页数:11
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