Carbon Nanotubes-Based Fuel Cell for Cr(VI) Removal and Electricity Generation.
Carbon Nanotubes-Based Fuel Cell for Cr(VI) Removal and Electricity Generation.
复制标题
DOI：
10.1021/acs.langmuir.2c01472
复制
发表时间：
2022-07
期刊：
影响因子：
--
通讯作者：
Dongfang Wang;Chuanxuan Wu;Zhiqiang Zong;J. Ye;Qingchuan Wu;Ruohan Li;Ben-lian Zhou;He Xu;D. Cai
中科院分区：
文献类型：
--
作者：
Dongfang Wang;Chuanxuan Wu;Zhiqiang Zong;J. Ye;Qingchuan Wu;Ruohan Li;Ben-lian Zhou;He Xu;D. Cai
燃料电池是一种能量转换器，它能把化学能转换成电能。以聚吡咯（PPy）和羧基化碳纳米管（CNTs-COOH）负载的石墨毡（GF）为阴极（GF/PPy/CNTs-COOH），在双室非生物燃料电池（D-nBFC）中高效去除Cr（VI）。其中，碱性溶液中的Na 2S 2 O3和强酸性溶液中的Cr（VI）分别用作阳极和阴极溶液。由饱和KCl溶液组成的琼脂盐桥用于在阳极和阴极之间传输离子。该系统对Cr（VI）的去除率可达99.6%。在90 min时，最大电流、功率和功率密度分别达到136.8 μA、18.7 μW和20.8 mW/m2。此外，GF/PPy/CNTs-COOH在4次循环后仍具有良好的电催化稳定性和重复使用性，这对D-nBFC体系的开发起到了重要作用。因此，本研究提供了一种环境友好和高效的方法来去除Cr（VI），同时发电。
A fuel cell, an energy transducer, can convert chemical energy into electrical energy. In this work, graphite felt (GF) loaded with polypyrrole (PPy) and carboxylic carbon nanotubes (CNTs-COOH) was used as a cathode (GF/PPy/CNTs-COOH) in a double-chamber nonbiofuel cell (D-nBFC) to remove Cr(VI) efficiently. Therein, Na2S2O3 in an alkaline solution and Cr(VI) in a strongly acidic solution were employed as anode and cathode solutions, respectively. An agar salt bridge, consisting of saturated KCl solution, was used to transport ions between the anode and cathode. This system suggested that the removal efficiency of Cr(VI) could reach 99.6%. The maximum current, power, and power density could achieve 136.8 μA, 18.7 μW, and 20.8 mW/m2 at 90 min, respectively. Additionally, GF/PPy/CNTs-COOH also had good electrocatalytic stability and reusability after four cycles, which played an important role in the development of the D-nBFC system. Therefore, this study provides an environmentally friendly and efficient method to remove Cr(VI) and generate electricity simultaneously.