Citation: SONG Chun-Dong, ZHANG Jing, GAO Ying, LU Yuan-Yuan, WANG Fang-Fang. Synthesis Direct Z-Scheme CuS-WO₃ Photocatalysts Based on an Element-Reaction Route and Their Photocatalytic Activity[J]. Acta Physico-Chimica Sinica, ;2017, 33(9): 1891-1897. doi: 10.3866/PKU.WHXB201705111 shu

Synthesis Direct Z-Scheme CuS-WO₃ Photocatalysts Based on an Element-Reaction Route and Their Photocatalytic Activity

College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China

Received Date: 28 March 2017
Revised Date: 25 April 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21573101, 20903054), the Liaoning Provincial Natural Science Foundation (2014020107), the Program for Liaoning Excellent Talents in University (LJQ2014041), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry ([2013]1792), the support plan for Distinguished Professor of Liaoning Province ([2015]153), the Liaoning BaiQianWan Talents program ([2017]96), and the fund of the State Key Laboratory of Catalysis in DICP (N-15-10).

CuS fabricated by an element-reaction route using copper and sulfur powders was loaded on WO₃ in situ at a low temperature. X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis, and UV-visible diffuse reflectance spectra were used to characterize the crystalline phase, morphology, particle size, and optical properties of the CuS-WO₃ samples. CuS modification had no obvious influence on the crystalline phase, particle size, and surface area of WO₃. However, it led to the enhancement of the utilization of light energy for WO₃. CuS-WO₃ composites were utilized as photocatalysts for the degradation of Rhodamine B. The CuS-WO₃ photocatalysts showed higher photocatalytic activity than pure WO₃ or CuS under visible light irradiation. CuS content had a significant influence on the photocatalytic activity of CuS-WO₃. CuS-WO₃ with 7% (w, mass fraction) CuS content exhibited the highest photocatalytic degradation activity (91.3%). Based on analysis of the band structure of CuS and WO₃, photoluminescence results, and active species trapping, a “direct Z-scheme” mechanism for the enhanced photocatalytic activity of CuS-WO₃ was proposed. The “direct Z-scheme” results in effective charge separation, leading to increased photocatalytic activity compared to that of CuS and WO₃.
- CuS,
- WO₃,
- Direct Z-scheme,
- Rhodamine B,
- Photocatalytic
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Synthesis Direct Z-Scheme CuS-WO3 Photocatalysts Based on an Element-Reaction Route and Their Photocatalytic Activity

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通讯作者: 陈斌, bchen63@163.com

Synthesis Direct Z-Scheme CuS-WO₃ Photocatalysts Based on an Element-Reaction Route and Their Photocatalytic Activity