Department of Chemical Engineering, Widya Mandala Surabaya Catholic University Kalijudan 37, Surabaya 60114, Indonesia.
Bioresour Technol. 2010 May;101(10):3534-40. doi: 10.1016/j.biortech.2009.12.123. Epub 2010 Jan 25.
Cassava peel was used as the precursor for activated carbon-based electrodes which were then prepared by a combination of chemical and physical activation. The surface of the activated carbon was treated with the oxidative chemical agents, 98 wt.% H(2)SO(4), 65 wt.% HNO(3), and 30 wt.% H(2)O(2) solutions. The surface modification had no significant effect on the specific surface area, but greatly influenced the surface chemistry of the carbons. The presence of oxygen-containing groups increased the polarity and hydrophilicity of activated carbon, and thus improved the performance of the activated carbon-based electrode. As a result, the specific capacitance of the HNO(3) modified AC-electrode reached 264.08F/g, an increase of 72.6% compared to the original one. The results indicate that cassava peel waste can potentially be applied as a raw material for the production of low cost-high performance activated carbon electrode materials for Electric Double Layer Capacitors (EDLCs).
木薯皮被用作制备基于活性炭的电极的前体，然后通过化学和物理活化相结合的方法制备。活性炭的表面用氧化化学试剂处理，包括 98wt.% H(2)SO(4)、65wt.% HNO(3)和 30wt.% H(2)O(2)溶液。表面改性对比表面积没有显著影响，但对碳的表面化学有很大影响。含氧基团的存在增加了活性炭的极性和亲水性，从而提高了基于活性炭的电极的性能。因此，经过 HNO(3)改性的 AC 电极的比电容达到 264.08F/g，比原始电极提高了 72.6%。结果表明，木薯皮废物有可能作为一种原料，用于生产低成本、高性能的用于双电层电容器（EDLCs）的活性炭电极材料。
