Facile treatment of wastewater produced in Hummer's method to prepare Mn3O4 nanoparticles and study their electrochemical performance in an asymmetric supercapacitor
Facile treatment of wastewater produced in Hummer's method to prepare Mn3O4 nanoparticles and study their electrochemical performance in an asymmetric supercapacitor
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DOI：
10.1039/c2ra22191h
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发表时间：
2013-01
期刊：
影响因子：
3.9
通讯作者：
Yueming Li;Xuemei Li
中科院分区：
文献类型：
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作者：
Yueming Li;Xuemei Li
Hummer法是制备石墨烯纳米片中间体氧化石墨（GO）最常用的方法之一。该方法产生的含锰废水和含酸废水的处理对保护环境和资源的有效利用具有重要意义。本文提出了一种简便的处理Hummer法废水的方法，以去除强酸并将Mn离子转化为Mn3O4纳米颗粒。采用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）和傅立叶变换红外光谱（FTIR）对所制备的Mn3O4纳米粒子进行了表征。同时研究了它们作为非对称超级电容器正极材料的电化学性能。初步的电化学测试表明，所制备的Mn3O4具有良好的电化学性能。
Hummer's method is one of most frequently used methods to prepare graphite oxide (GO), an intermediate of graphene nanosheets. The treatment of wastewater containing a large amount of Mn ion and acid produced in this method is very important to protect the environment and use resources efficiently. In this report, facile treatment of wastewater produced in Hummer's method was proposed to remove strong acid and transform Mn ion into Mn3O4 nanoparticles. The as-prepared Mn3O4 nanoparticles have been characterized with X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrum (FTIR). Their electrochemical performance as cathode material in an asymmetric supercapacitor was also investigated. The primary electrochemical experiment has shown that as-prepared Mn3O4 exhibited good electrochemical performance.