Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
13415862 | Fuel | 2020 | 10 Pages |
Abstract
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 RGOâ¯+â¯Cu2Oâ¯+â¯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-Cu2O/Bi2WO6 but also provides a guide to the design of RGO-based photocatalysts.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Hongqiang Shen, Guiwu Liu, Yong Zhao, Di Li, Jinhui Jiang, Jinrui Ding, Baodong Mao, Hao Shen, Kyo-Seon Kim, Weidong Shi,