Highly active MnO2 nanosheet synthesis from graphene oxide templates and their application in efficient oxidative degradation of methylene blue
Highly active MnO2 nanosheet synthesis from graphene oxide templates and their application in efficient oxidative degradation of methylene blue
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DOI：
10.1039/c3ra40942b
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发表时间：
2013-07
期刊：
影响因子：
3.9
通讯作者：
Guixia Zhao;Jiaxing Li;X. Ren;Jun Hu;Wenping Hu;Xiangke Wang
中科院分区：
文献类型：
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作者：
Guixia Zhao;Jiaxing Li;X. Ren;Jun Hu;Wenping Hu;Xiangke Wang
本文介绍了一种以氧化石墨烯为自祭模板一步法制备氧化锰纳米片的方法。氧化石墨烯纳米片与KMnO4之间的氧化还原反应导致碳骨架被边共享的[MnO6]八面体原位取代，从而形成少层的MnO2纳米片。研究还表明，这些MnO2纳米片对亚甲基蓝(MB)染料的氧化降解具有很高的活性，MB染料可以通过快速脱甲基化分解成小分子碎片，然后芳环裂解，并在短时间内部分矿化成无机离子。我们预计，几层MnO2纳米片有望成为一种新型的无毒材料，用于处理有机染料废水，并将其应用于环境污染治理中其他有机污染物的氧化。
In this paper, a facile one-step method towards manganese oxide nanosheets is described which uses graphene oxide as a self-sacrificial template. A redox reaction between graphene oxide nanosheets and KMnO4 results in the formation of few-layer MnO2 nanosheets due to the in situ replacement of the carbon framework by edge-sharing [MnO6] octahedra. It is also demonstrated that these MnO2 nanosheets show high activity for the oxidative degradation of methylene blue (MB) dye, in which the MB dye can be decomposed into small molecule fragments through fast demethylation, followed by aromatic ring cracking, and partial mineralization into inorganic ions in a short time. We expect that the few-layer MnO2 nanosheets may be envisaged as a new non-toxic material for the treatment of organic dye-containing wastewater, and its application for the oxidation of other organic pollutants in environmental pollution cleanup.