TY - JOUR
T1 - Convenient Synthesis of WS2-MoS2 Heterostructures with Enhanced Photocatalytic Performance
AU - Zhao, Yongjie
AU - Liu, Jialin
AU - Zhang, Xiaowei
AU - Wang, Chengzhi
AU - Zhao, Xiuchen
AU - Li, Jingbo
AU - Jin, Haibo
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019
Y1 - 2019
N2 - A series of WS2-MoS2 composites with different phase ratios have been successfully constructed. First, WS2 with hexagonal phase structure has been achieved by directly annealing a mixture of commercial W and S powders in an Ar atmosphere. Then the hydrothermal method is utilized to realize the epitaxial growth of MoS2 onto the surface of WS2. The dual-petal nanostructure of WS2-MoS2 composites has been revealed by scanning electron microscopy and transmission electron microscopy. The measurement of the optoelectronic property illustrates that WS2-MoS2 heterostructures can present more active sites and a higher effective separation of carriers than can bare WS2 and MoS2. Specifically speaking, 4WS2-96MoS2 can cause the complete degradation of methylene blue within 150 min, and the difference value of the photocurrent can reach a value of 26 μA, which obviously outperforms that of bare MoS2 and WS2. These aforementioned improved performances are closely related to this rationally designed structure for WS2-MoS2 heterostructures and are expected to be promising applications in the field of optoelectronic devices.
AB - A series of WS2-MoS2 composites with different phase ratios have been successfully constructed. First, WS2 with hexagonal phase structure has been achieved by directly annealing a mixture of commercial W and S powders in an Ar atmosphere. Then the hydrothermal method is utilized to realize the epitaxial growth of MoS2 onto the surface of WS2. The dual-petal nanostructure of WS2-MoS2 composites has been revealed by scanning electron microscopy and transmission electron microscopy. The measurement of the optoelectronic property illustrates that WS2-MoS2 heterostructures can present more active sites and a higher effective separation of carriers than can bare WS2 and MoS2. Specifically speaking, 4WS2-96MoS2 can cause the complete degradation of methylene blue within 150 min, and the difference value of the photocurrent can reach a value of 26 μA, which obviously outperforms that of bare MoS2 and WS2. These aforementioned improved performances are closely related to this rationally designed structure for WS2-MoS2 heterostructures and are expected to be promising applications in the field of optoelectronic devices.
UR - http://www.scopus.com/inward/record.url?scp=85074720122&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.9b08101
DO - 10.1021/acs.jpcc.9b08101
M3 - Article
AN - SCOPUS:85074720122
SN - 1932-7447
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
ER -