Piezoelectric polarization induced by dual piezoelectric materials ZnO nanosheets/MoS2 heterostructure for enhancing photoelectrochemical water splitting

被引:39
作者
Wang, Dong [1 ]
Fu, Qian [1 ]
Tian, Jiayi [3 ]
Zhou, Hongmiao [1 ]
Liu, Rui [1 ]
Zhan, Difu [1 ]
Peng, Zhuo [1 ]
Han, Changcun [1 ,2 ]
机构
[1] Hubei Univ Technol, Natl 111 Res Ctr Microelect & Integrated Circuits, Hubei Engn Technol Res Ctr Energy Photoelect Devic, Sch Sci, Wuhan 430068, Peoples R China
[2] Tianjin Chengjian Univ, Tianjin Key Lab Bldg Green Funct Mat, Tianjin 300384, Peoples R China
[3] Hubei Univ Technol, Sch Civil Engn Architecture & Environm, 28 Nanli Rd, Wuhan 430068, Peoples R China
基金
中国国家自然科学基金;
关键词
ZnO; MoS2; Piezoelectric effect; Photoelectrochemical water splitting; PHOTOCATALYTIC ACTIVITY; QUANTUM DOTS; EFFICIENT; MOS2; PERFORMANCE; EVOLUTION; NANOSTRUCTURES; HETEROJUNCTION; SEMICONDUCTOR; PHOTOANODES;
D O I
10.1016/j.jcis.2023.09.157
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Zinc oxide (ZnO) has a broad range of applications in piezo-photoelectrochemical water splitting. However, the narrow light absorption range and high photogenerated carrier recombination efficiency make ZnO somewhat limited in applying piezo-photoelectrochemical water splitting. Heterogeneous structure construction is a superior handle to these two drawbacks. Herein, few-layer molybdenum disulfide (MoS2) nanospheres are compounded on ZnO nanosheets (NSs) to form a dual-piezoelectric-material heterojunction of ZnO NSs/MoS2. The photocurrent density of ZnO NSs/MoS2 reaches 0.68 mA/cm2 at 1.23 V vs. RHE under ultrasonic vibrations. It is 2.4 times higher than that of ZnO NSs under ultrasonic vibrations. The efficient piezo-photoelectrochemical performance is attributed to increased absorption range and polarization field. On the one hand, the narrow band gap of the few-layer MoS2 widens the light absorption range of ZnO. On the other hand, compared to pure ZnO NSs, ZnO NSs/MoS2 has an enhanced polarization field under ultrasonic vibrations due to the piezoelectric properties of dual piezoelectric materials, which dramatically accelerates the electron transfer and suppresses the recombination of between electrons and holes. This work provides a new approach to constructing photo electrodes with effective piezoelectric photocatalytic properties.
引用
收藏
页码:1166 / 1176
页数:11
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