期刊
RSC ADVANCES
卷 6, 期 106, 页码 104549-104555出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra24320g
关键词
-
资金
- NSFC [51372277, 50902066]
- China Postdoctoral Science Foundation [2013M530922, 2014T70253]
- Program for Liaoning Excellent Talents in University [LJQ2014118]
- Fundamental Research Funds for the Central Universities [15CX08005A]
- Natural Science Fund of Liaoning Province [201602458]
Herein, we report an environmentally benign synthesis of a high-performance reduced graphene oxide/MnFe2O4 (RGO/MnFe2O4) catalyst for methylene blue (MB) decomposition in neutral solution using a GO/MnSO4 suspension from a modified Hummers method and FeSO4 as the precursors. The as-prepared RGO/MnFe2O4 catalyst shows exceptional performance towards the MB decomposition in the presence of H2O2. In particular, 10 mL of MB (50 mg L-1) can be thoroughly decolorized in 130 min and 78% mineralized with 5 mg of RGO/MnFe2O4 hybrid at room temperature. More interestingly, the catalysts can be magnetically recycled. The good catalytic performance of the RGO/MnFe2O4 hybrid is not only attributed to the synergetic effects of RGO, MnFe2O4, H2O2 and MB molecules, but also related to the redox couples of Fe/Mn ions during the reaction. We have firstly experimentally demonstrated that the catalytic performance of MnFe2O4 is dominated by Fe3+/Fe2+ in the initial stage (<70 min) then by Mn3+/Mn2+ in the later stage (>70 min), while Fe2+/Mn3+ redox in turn benefits the redox cycles of Fe3+/Fe2+ and Mn3+/Mn2+. Our results not only provide an alternative strategy for green synthesis of high-performance functional nanomaterials, but also promote a deep understanding of the mechanism of MnFe2O4 catalyst for MB decomposition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据