MnO2 decorated porous carbon derived from Enteromorpha prolifera as flow-through electrode for dual-mode capacitive deionization
MnO2 decorated porous carbon derived from Enteromorpha prolifera as flow-through electrode for dual-mode capacitive deionization
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MnO2修饰的浒苔多孔碳作为双模式电容去离子流通电极
DOI：
10.1016/j.desal.2021.114977
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发表时间：
2021-05
期刊：
影响因子：
9.9
通讯作者：
Yong Liu;Bo Geng;Yuchen Zhang;Xin Gao;Xin Du;Xinyue Dou;Haiguang Zhu;Xun Yuan
中科院分区：
文献类型：
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作者：
Yong Liu;Bo Geng;Yuchen Zhang;Xin Gao;Xin Du;Xinyue Dou;Haiguang Zhu;Xun Yuan
由于淡水短缺，迫切需要开发配备低成本电极的高效电容去离子（CDI）系统，将咸水处理为淡水。另一方面，浒苔（Enteromorphaprolifera，简称EP，全球海洋中的一种典型生物废弃物）引发的海洋生态危机已成为全球海洋生态系统的严重威胁。为了一石二鸟，我们报告了一种EP衍生的MnO2装饰活性炭复合材料（ep-AC@MnO2）的设计，作为高性能双模式电容去离子的低成本电极。制成的 ep-AC@MnO2 显示出 335.6 F g−1 的高比电容，并具有双模式钠存储行为。受益于这种独特的双模电容特性，基于ep-AC@MnO2的双模CDI系统表现出高效的海水淡化性能（海水淡化能力/速率：25.7 mg g−1/2.95 mg g−1min−1）和出色的海水淡化可回收性（30个循环后偏角为11.3%）。这项工作可能会引起广泛的兴趣，因为它不仅举例说明了用于电容式海水淡化的低成本且高效的双模电容CDI电极材料的简单制造，而且还提供了一种将海洋生物废物变废为宝的可持续策略，以缓解EP引起的海洋生态危机。
Owing to fresh-water shortage, developing highly efficient capacitive deionization (CDI) system equipped with low-cost electrodes is urgently required to process saline water to freshwater. On the other hand,Enteromorphaprolifera(EP for short, a typical bio-waste in global oceans) induced marine ecological crisis has become a serious threat to the global marine ecosystem. Aiming to kill two birds with one stone, we report the design of an EP-derived MnO2-decorated activated carbon composite (ep-AC@MnO2) as low-cost electrodes for high-performance dual-mode capacitive deionization. The as-fabricated ep-AC@MnO2displays a high specific capacitance of 335.6 F g−1with dual-mode sodium storage behavior. Benefiting from this unique dual-mode capacitance feature, the ep-AC@MnO2-based dual-mode CDI system exhibits highly efficient desalination performance (desalination capacity/rate: 25.7 mg g−1/2.95 mg g−1min−1) with excellent desalination recyclability (11.3% declination after 30 cycles). This work could be of broad interest since it not only exemplifies the simple fabrication of low-cost yet high-efficiency CDI electrode material with dual-mode capacitance for capacitive desalination, but also offers a sustainable strategy to turn marine biowaste into treasure for possible relieving of the EP-induced marine ecological crisis.