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CO 2 ‐Assisted Solution‐Phase Selective Assembly of 2D WS 2 ‐WO 3 ⋅H 2 O and 1T‐2H MoS 2 to Desirable Complex Heterostructures
Author(s) -
Ren Yumei,
Xu Qun,
Wang Chongze,
Zheng Xiaoli,
Jia Yu,
Qi Yuhang,
Zhou Yunchun,
Yang Xinan,
Zhang Zhenyu
Publication year - 2017
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201700058
Subject(s) - heterojunction , stacking , materials science , phase (matter) , van der waals force , nanotechnology , optoelectronics , chemistry , molecule , organic chemistry
Precise control of the lateral and vertical integration of two‐dimensional (2D) heterostructures is exciting for novel electronic and photovoltaic applications. Fabricating assemblies of high‐quality heterostructures with desirable compositions and sequences is challenging. In this work, with the assistance of supercritical CO 2 (SC CO 2 ), we successfully prepared the complex heterostructures of WS 2 ‐WO 3 ⋅H 2 O/1T‐2H MoS 2 with selective stacking assembly. Thanks to the unique properties of SC CO 2 , which can help to construct a unique solvent system where the hydrophilic or hydrophobic structure for the 2D layer heterostructure can be chosen, 2H‐WS 2 /2H‐MoS 2 assemblies are formed efficiently as the preferred van der Waals heterojunctions. A superior photoelectrochemical activity toward hydrogen evolution based on such the quaternary heterostructures is achieved due to their strong interlayer electronic coupling as well as the increased conductivity and active sites in the heterostructures.