Dimensional heterostructures of 1D CdS/2D ZnIn2S4composited with 2D graphene: designed synthesis and superior photocatalytic performance.
The development of photocatalysts with superior photoactivity and stability for the degradation of organic dyes is very important for environmental remediation. In this study, we have presented a multidimensional (1D and 2D) structured CdS/ZnIn2S4/RGO photocatalyst with superior photocatalytic performance. The CdS/ZnIn2S4helical dimensional heterostructures (DHS) were prepared via a facile solvothermal synthesis method to facilitate the epitaxial growth of 2D ZnIn2S4nanosheets on 1D CdS nanowires. Ultrathin 2D ZnIn2S4nanosheets have grown uniformly and perpendicular to the surface of 1D CdS nanowires. The as-obtained 1D/2D CdS/ZnIn2S4helical DHS show good photocatalytic properties for malachite green (MG). Subsequently, 2D reduced graphene oxide (RGO) was introduced into the 1D/2D CdS/ZnIn2S4helical DHS as a co-catalyst. The photoactivity and stability of the CdS/ZnIn2S4/RGO composites are significantly improved after 6 cycles. The enhanced photoactivity can be attributed to the high surface area of RGO, the improved adsorption of organic dyes and the efficient spatial separation of photo-induced charge carriers. The transfer of photo-generated electrons from the interface of CdS and ZnIn2S4to RGO also restricted the photocorrosion of metal sulfide, suggesting an improved stability of the reused CdS/ZnIn2S4/RGO composited photocatalyst.
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn.
Qingyong
Q
Tian
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn and Suzhou Research Institute of Wuhan University, Suzhou 215000, P. R. China.
Wei
http://orcid.org/0000-0002-7672-7965
W
Wu
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn.
Jun
J
Liu
Department of Biological Engineering and Environment Science Department, Changsha University, Changsha 410005, P. R. China.
Zhaohui
Z
Wu
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn.
Weijing
W
Yao
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn.
Jin
J
Ding
School of Physics and Technology and School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. weiwu@whu.edu.cn czjiang@whu.edu.cn.
Changzhong
C
Jiang