Rational Design of α-Fe2O3/Reduced Graphene Oxide Composites: Rapid Detection and Effective Removal of Organic Pollutants

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• 作者：Lili Zhang ; Zhiwei Bao ; Xinxin Yu ; Peng Dai ; Jin Zhu ; Mingzai Wu ; Guang Li ; Xiansong Liu ; Zhaoqi Sun ; Changle Chen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 16, 2016
• 年：2016
• 卷：8
• 期：10
• 页码：6431-6438
• 全文大小：602K
• ISSN：1944-8252

文摘

α-Fe₂O₃/reduced graphene oxide (α-Fe₂O₃/rGO) composites are rationally designed and prepared to integrate organic pollutants detection and their photocatalytic degradation. Specifically, the composites are used as the substrate for surface-enhanced Raman scattering (SERS) to detect rhodamine 6G (R6G). Repeatable strong SERS signals could be obtained with R6G concentration as low as 10^–5 M. In addition, the substrate exhibits self-cleaning properties under solar irradiation. Compared with pure α-Fe₂O₃ and α-Fe₂O₃/rGO mechanical mixtures, the α-Fe₂O₃/rGO composites show much higher photocatalytic activity and much greater Raman enhancement factor. After 10 cycling measurements, the photodegradation rate of R6G could be maintained at 90.5%, indicating high stability of the photocatalyst. This study suggests that the α-Fe₂O₃/rGO composites would serve both as recyclable SERS substrate and as excellent visible light photocatalyst.