Combating heavy metal pollution and energy crisis together, while maintaining the green chemistry standard is a great challenge. Among heavy metals, the toxicity of hexavalent chromium compounds is well known one which can be adsorbed from water and can be used as an electrode for energy storage. In this work, a nanocomposite of exhausted activated carbon (extracted from commercial water filter) and polyaniline was used as an adsorbent for toxic Cr(VI) adsorption from mine water, and a high-performance asymmetric energy storage device was developed from it. Firstly, the adsorbent was explored for the proficient removal of toxic Cr(VI) from water. The adsorption data was found to be well fitted with the Langmuir isotherm, and the pseudo-second order kinetics suggested the monolayer chemisorbed nature. In the next step, the adsorbed material was investigated as the cathode material for supercapacitors. The nanocomposite based on Cr(VI)-adsorbed material exhibited a high specific capacitance of 219.6 F/g at 1 A/g current density and moderate cycling stability of 77% after 5000 charges/discharge cycles. An asymmetric device developed using this hybrid material achieved an elevated energy density of 60.8 Wh/kg in organic electrolyte. The device was used to light up a strip of 43 red LEDs connected in parallel.

在保持绿色化学标准的同时，应对重金属污染和能源危机是一项巨大的挑战。在重金属中，六价铬化合物的毒性是众所周知的，它可以从水中吸附，并且可以用作储能电极。在这项工作中，将耗尽的活性炭（从商用滤水器中提取）和聚苯胺的纳米复合材料用作矿井水中有毒Cr（VI）吸附的吸附剂，并由此开发了一种高性能的不对称储能装置。首先，研究了吸附剂用于从水中有效去除有毒的Cr（VI）的方法。发现吸附数据与Langmuir等温线非常吻合，拟二级动力学表明单层化学吸附性质。在下一步中 研究了吸附材料作为超级电容器的阴极材料。基于Cr（VI）吸附的材料的纳米复合材料在1 A / g的电流密度下表现出219.6 F / g的高比电容，在5000次充电/放电循环后表现出77％的适度循环稳定性。使用这种混合材料开发的不对称器件在有机电解质中的能量密度提高了60.8 Wh / kg。该设备用于点亮并联连接的43个红色LED灯带。在有机电解质中为8 Wh / kg。该设备用于点亮并行连接的43个红色LED灯条。在有机电解质中为8 Wh / kg。该设备用于点亮并行连接的43个红色LED灯条。