School of Chemical Engineering, Yeungnam University, Gyeongsan-si, 712-749, South Korea.
Department of Electronics and Instrumentation, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
Environ Res. 2022 Dec;215(Pt 2):114293. doi: 10.1016/j.envres.2022.114293. Epub 2022 Sep 19.
The main objective of this study was to banana waste-derived activated carbon (BWAC) make a high pore surface area was prepared and composited with FeO via a facile hydrothermal method. Various physiochemical characteristics of the prepared samples were evaluated using XRD, FTIR, FESEM, Raman Spectroscopy and XPS analysis. In addition, cyclic voltammetry and electrochemical impedance spectroscopy analyses were performed to determine the electrochemical properties of the prepared samples. The FeO/BWAC sample showed a higher capacitance (285 F g) than BWAC at the same scan rate of 10 mV s. The capacitive deionization (CDI) cell configuration was varied, and its electro-sorption and defluoridization efficiencies were analyzed during the lead (Pb) removal 90%. An asymmetric combination of electrodes in the CDI cell exhibited better heavy metal removal performance, possibly due to the synergistic effect of the high surface area and the balance between the active adsorption site and the overlapping effect of the EDL. As a result, FeO/BWAC could be a potential resource for supercapacitors and CDI electrodes, and the novel FeO/BWAC nanocomposites outstanding performance suggests that they could be helpful for future energy storage and environmental applications.
本研究的主要目的是制备一种具有高孔表面积的香蕉废料衍生活性炭（BWAC），并通过简便的水热法将其与 FeO 复合。采用 XRD、FTIR、FESEM、拉曼光谱和 XPS 分析对制备样品的各种物理化学性质进行了评估。此外，还进行了循环伏安法和电化学阻抗谱分析，以确定制备样品的电化学性能。与 BWAC 相比，在相同的扫描速率为 10 mV s 时，FeO/BWAC 样品表现出更高的电容（285 F g）。改变电容去离子（CDI）电池的配置，并分析其在去除 90%铅（Pb）过程中的电吸附和除氟效率。CDI 电池中电极的不对称组合表现出更好的重金属去除性能，这可能是由于高表面积和活性吸附位点之间的平衡以及 EDL 的重叠效应的协同作用。因此，FeO/BWAC 可能是超级电容器和 CDI 电极的潜在资源，新型 FeO/BWAC 纳米复合材料的优异性能表明，它们可能有助于未来的储能和环境应用。
