Partial Ion Exchange Derived 2D Cu-Zn-In-S Nanosheets as Sensitizers of 1D TiO2Nanorods for Boosting Solar Water Splitting.
A facile route for the fabrication of a novel ZnS shell/Cu-Zn-In-S nanosheets/TiO2nanorods heterojunction was reported in this work. Especially, the quaternary Cu-Zn-In-S nanosheets were synthesized creatively from the ternary ZnIn2S4nanosheets by partial exchange reaction, leading to substantial enhancement on the light absorbance. Such heterojunction could increase the surface area and accelerate the charge transfer resulting from its hierarchical 2D/1D structure and favorable energy bands. Moreover, the ZnS coating acted as a passivation layer as well as a potential barrier, significantly suppressing the interface recombination. The above synergistic effects resulted in the largely increased photocurrent density from 0.34 mA cm-2for the pristine TiO2to 0.81 mA cm-2for the heterojunction at 0.8 V vs RHE.
College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University , Suzhou 215006, P. R. China.
Qiong
Q
Liu
College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University , Suzhou 215006, P. R. China.
Fengren
F
Cao
College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University , Suzhou 215006, P. R. China.
Fangli
F
Wu
Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, P. R. China.
Shimou
S
Chen
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, P. R. China.
Jie
J
Xiong
College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University , Suzhou 215006, P. R. China.
Liang
L
Li
Cu−Zn−In−S; TiO2; ZnIn2S4; heterostructure; ion exchange; nanosheets; photoelectrochemical; water splitting