Electrospun Composites Made of Reduced Graphene Oxide and Activated Carbon Nanofibers for Capacitive Deionization
Electrospun Composites Made of Reduced Graphene Oxide and Activated Carbon Nanofibers for Capacitive Deionization
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由还原氧化石墨烯和活性碳纳米纤维制成的静电纺复合材料用于电容去离子
DOI：
10.1016/j.electacta.2014.06.067
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发表时间：
2014-08-10
影响因子：
6.6
通讯作者：
Qiu, Jieshan
中科院分区：
文献类型：
--
作者：
Dong, Qiang;Wang, Gang;Qiu, Jieshan
电容去离子（CDI）技术是一种从咸水和微咸水中去除盐离子的技术，其性能主要受电极材料的影响。本研究以还原氧化石墨烯（RGO）和活性炭纳米纤维（ACF）共静电纺丝制备CDI复合材料，然后进行CO2活化。对制备的RGO/ACF复合材料的形貌、力学性能和电导率进行了表征，并对其NaCl吸附能力进行了评价。在静电纺RGO/ACF复合材料中，纳米纤维起到固定石墨烯和避免石墨烯团聚的作用，而石墨烯作为导电剂提高了导电性能，改善了孔宽分布。结果表明，在初始盐浓度为400 mg/L时，RGO/ACF-10的电吸附量高达7.2 mg g（-1）。这种RGO/ACF复合材料的制备方法为高性能CDI碳基电极材料的制备提供了新的途径。(C) 2014 Elsevier Ltd.版权所有。
Capacitive deionization (CDI) technology is an alternative technique to remove salt ions from salted and brackish water, of which the performance is mainly governed by the electrode materials. In the present study, the composites for CDI were produced by co-electrospinning the reduced graphene oxide (RGO) and activated carbon nanofiber (ACF), followed by CO2 activation. The morphology, mechanical property and conductivity of the as-made RGO/ACF composites were characterized, and their NaCl adsorption capacity was evaluated. In the electrospun RGO/ACF composites, the nanofibers function to immobilize graphene and to avoid the agglomeration of graphene, while the graphene helps to increase the conductivity as a conductive agent and to improve the pore width distribution. It has been found that the RGO/ACF-10 shows an excellent electrosorption capacity as high as 7.2 mg g(-1) at 400 mg/L of initial salt concentration. Such an approach to fabrication of RGO/ACF composites may pave a new way to produce carbon-based electrode materials for CDI with high performance. (C) 2014 Elsevier Ltd. All rights reserved.