基于单质法合成直接Z型CuS-WO<sub>3</sub>及光催化性能

引用本文: 宋春冬, 张静, 高莹, 卢圆圆, 王芳芳. 基于单质法合成直接Z型CuS-WO₃及光催化性能[J]. 物理化学学报, 2017, 33(9): 1891-1897. doi: 10.3866/PKU.WHXB201705111 shu

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

基于单质法合成直接Z型CuS-WO₃及光催化性能

辽宁石油化工大学化学化工与环境学部, 辽宁抚顺 113001
基金项目:
国家自然科学基金（21573101），辽宁省自然科学基金项目（2014020107），辽宁省高等学校优秀人才支持计划项目（LJQ2014041），教育部留学回国科研启动基金项目（教外司留[2013]1792号），辽宁省特聘教授项目（[2015]153），辽宁省百千万人才工程科技项目（[2017]96）和中国科学院大连化学物理研究所催化基础重点实验室开放课题项目（N-15-10）资助

摘要: 以Cu粉和S粉作为CuS前驱体，基于单质法在低温下原位合成了CuS-WO₃光催化剂。采用X射线衍射（XRD）、扫描电镜（SEM）、X射线光电子能谱（XPS）、比表面积和紫外-可见漫反射光谱（UV-Vis DRS）对CuS-WO₃的晶相、形貌、粒径及光学性质等进行了表征。结果表明，CuS对WO₃的晶相结构、粒径及比表面积没有明显影响，但是可以有效提高WO₃对可见光的吸收。以降解罗丹明B （RhB）为反应模型，研究了CuS对WO₃光催化性能的影响。结果表明，在可见光照射下，CuS-WO₃复合材料的光催化活性优于CuS、WO₃的光催化活性，且CuS的含量对CuS-WO₃光催化活性影响显著，CuS含量为7% （w，质量分数）时，光催化效率最高（91.3%）。进一步结合CuS、WO₃的能带位置，荧光光谱（PL）活性物种鉴定试验，提出CuS-WO₃复合光催化剂的“直接Z型”光催化机理。直接Z型CuS-WO₃复合光催化剂中可以有效抑制电子-空穴的复合。因此，与CuS和WO₃相比，CuS-WO₃复合光催化剂具有较高的光催化性能。

关键词:

English

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
Available Online: 11 May 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).

Abstract: 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.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

基于单质法合成直接Z型CuS-WO₃及光催化性能

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于单质法合成直接Z型CuS-WO3及光催化性能

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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