Citation: Zhiwei Chen, Chang Feng, Weibing Li, Zhiyong Sun, Jian Hou, Xiangbo Li, Likun Xu, Mingxian Sun, Yuyu Bu. Enhanced visible-light-driven photocatalytic activities of 0D/1D heterojunction carbon quantum dot modified CdS nanowires[J]. Chinese Journal of Catalysis, ;2018, 39(4): 841-848. doi: 10.1016/S1872-2067(17)62972-3 shu

Enhanced visible-light-driven photocatalytic activities of 0D/1D heterojunction carbon quantum dot modified CdS nanowires

Zhiwei Chen ^a,b, ,
Chang Feng ^b ,
Weibing Li ^a,b ,
Zhiyong Sun ^b ,
Jian Hou ^b ,
Xiangbo Li ^b ,
Likun Xu ^b ,
Mingxian Sun ^b ,
Yuyu Bu ^c

a School of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China;
b State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, Shandong, China;
c Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an 710071, Shaanxi, China

Received Date: 19 November 2017
Revised Date: 9 December 2017

Fund Project: This work was financially supported by the Research Fund of State Key Laboratory for Marine Corrosion and Protection of Luoyang Ship Material Research Institute (LSMRI) (KF160413), and the National Natural Science Foundation of China (21301161, 41376126).

Zero-dimensional carbon dots (0D C-dots) and one-dimensional sulfide cadmium nanowires (1D CdS NWs) were prepared by microwave and solvothermal methods, respectively. A series of heterogeneous photocatalysts that consisted of 1D CdS NWs that were modified with 0D C-dots (C-dots/CdS NWs) were synthesized using chemical deposition methods. The mass fraction of C-dots to CdS NWs in these photocatalysts was varied. The photocatalysts were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. Their photocatalytic performance for the spitting of water and the degradation of rhodamine B (RhB) under visible light irradiation were investigated. The photocatalytic performance of the C-dots/CdS NWs was enhanced when compared with that of the pure CdS NWs, with the 0.4% C-dots/CdS NWs exhibiting the highest photocatalytic activity for the splitting of water and the degradation of RhB. The enhanced photocatalytic activity was attributed to a higher carrier density because of the heterojunction between the C-dots and CdS NWs. This heterojunction improved the electronic transmission capacity and promoted efficient separation of photogenerated electrons and holes.
- Semiconductor photocatalysis,
- Heterojunction,
- CdS nanowire,
- Carbon quantum dot,
- Water splitting
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