期刊
FUEL
卷 259, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.116311
关键词
Cu2O; Graphene; Hydrogen production; Tetracycline degradation; Z-scheme
资金
- National Natural Science Foundation of China [21522603, 61674071]
- Natural Science Foundation of Jiangsu Province [SBK2017041090]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20140011]
- ChineseGerman Cooperation Research Project [GZ1091]
- Program for High-Level Innovative and Entrepreneurial Talents in Jiangsu Province
- Program for New Century Excellent Talents in University [NCET-13-0835]
- Henry Fok Education Foundation [141068]
- Six Talents Peak Project in Jiangsu Province [XCL-025, 2014-XCL-002]
- Innovation/Entrepreneurship Program of Jiangsu Province [[2015]26]
- Qing Lan Project [[2016]15]
With the development of visible-light-driven photocatalytic systems, the Z-scheme system has been paid more attention for water-splitting and contaminants degradation in an effort to the full utilization of superior band potential between two different semiconductors. Here we present systemic investigation of the reduced graphene oxide (RGO)-based composites, including RGO-Cu2O, RGO-Bi2WO6, RGO-Cu2O/Bi2WO6, Cu2O/Bi2WO6 heterojunction and physical mixed RGO + Cu2O + Bi2WO6, to give a clear demonstration of the Z-scheme photocatalytic mechanism. The three-component RGO-Cu2O/Bi2WO6, composite showed the highest photocatalytic activity on water splitting, which is about 3 times and 4 times that of RGO-Cu2O and Cu2O respectively. And it also exhibited an excellent photocatalytic performance with a 86% degradation rate for tetracycline that is about 3 (6) times as high as that of pure Cu2O(Bi2WO6). These results demonstrate that the construction of RGO-Cu2O/Bi2WO6 Z-scheme system is beneficial to water splitting and pollutant degradation for which the superior band potential of Cu2O and Bi2WO6 are fully utilized. This work not only reports a new Z-scheme system of RGO-Cu-2 O/Bi2WO6 but also provides a guide to the design of RGO-based photocatalysts.
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