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Chitosan-based activated carbon as economic and efficient sustainable material for capacitive deionization of low salinity water

机译：基于壳聚糖的活性炭作为低盐度水的电容去离子的经济和有效的可持续材料

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Capacitive deionization (CDI) is a novel low-energy green desalination technology that has attracted much attention in recent years, especially for the desalination of low salinity water. One of the key issues in CDI is the electrode materials, and many efforts have been devoted to developing materials with high specific surface areas, appropriate pore distributions, and good electronic conductivity, in order to obtain a high salt adsorption capacity. In this study, chitosan was selected as a precursor for the preparation of high-performance chitosan-based activated carbon (CTS-AC) for use in CDI electrodes via pyrolysis and KOH activation. The results show that CTS-AC800 (activated at 800 °C) has the largest BET specific surface area (2727 m ~(2) g ~(?1) ), and exhibits an appropriate pore size distribution (<10 nm), nitrogen doping (2.0%) and good electronic conductivity (2.09 S cm ~(?1) ). The CDI performance results show that the CTS-AC800 electrode has a saturated salt adsorption capacity of 14.12 mg g ~(?1) in a 500 mg L ~(?1) NaCl solution and retains 95% capacity after 150 adsorption–desorption cycles. Thus, chitosan is a promising, sustainable precursor for CDI electrode materials.
机译：电容去离子（CDI）是一种新型的低能绿色脱盐技术，近年来引起了很多关注，特别是对于低盐度水的脱盐。 CDI的关键问题之一是电极材料，并且许多努力已经致力于开发具有高比表面积，适当的孔隙分布和良好的电子电导率的材料，以获得高盐雾吸附能力。在本研究中，选择壳聚糖作为制备高性能壳聚糖的活性炭（CTS-AC）的前体，用于通过热解和KOH活化用于CDI电极。结果表明，CTS-AC800（在800°C时激活）具有最大的BET比表面积（2727m〜（2）G〜（α1）），并具有适当的孔径分布（<10nm），氮气掺杂（2.0％）和良好的电子电导率（2.09厘米〜（？1））。 CDI性能结果表明，CTS-AC800电极在500mg L〜（α1）NaCl溶液中具有14.12mg g〜（α1）的饱和盐吸附容量，并在150℃后保留95％的容量。因此，壳聚糖是CDI电极材料的有希望的可持续前体。

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