Weerasuk Bordin, Chutimasakul Threeraphat, Prigyai Nicha, Nilgumhang Kewalee, Kaeopookum Piriya, Sangtawesin Tanagorn
Thailand Institute of Nuclear Technology (Public Organization), 9/9 Moo 7, Saimoon, Ongkharak, Nakhon Nayok 26120, Thailand.
Materials (Basel). 2024 Jul 1;17(13):3233. doi: 10.3390/ma17133233.
This study introduces a gamma pretreatment of water hyacinth powder for activated carbon (AC) production with improved electrochemical properties for supercapacitor applications. The structural and morphological changes of post-irradiation were meticulously analyzed using scanning electron microscopy (SEM), Raman spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) analysis, and X-ray photoelectron spectroscopy (XPS). The pretreatment significantly modifies the pore structure and reduces the particle size of the resulting activated carbon (WHAC). Nitrogen adsorption-desorption isotherms indicated a substantial increase in micropore volume with escalating doses of gamma irradiation. Electrochemically, the activated carbon produced from pretreated WH at 100 kGy exhibited a marked increase in specific capacitance, reaching 257.82 F g, a notable improvement over the 95.35 F g of its untreated counterpart, while maintaining 99.40% capacitance after 7000 cycles. These findings suggest that gamma-pretreated biomasses are promising precursors for fabricating high-performance supercapacitor electrodes, offering a viable and environmentally friendly alternative for energy storage technology development.
本研究介绍了一种对水葫芦粉末进行γ预处理以生产活性炭（AC）的方法，所制备的活性炭具有改善的电化学性能，适用于超级电容器应用。使用扫描电子显微镜（SEM）、拉曼光谱、傅里叶变换红外光谱（FT-IR）、布鲁诺尔-埃米特-泰勒（BET）分析和X射线光电子能谱（XPS）对辐照后的结构和形态变化进行了细致分析。预处理显著改变了所得活性炭（WHAC）的孔结构并减小了其粒径。氮气吸附-脱附等温线表明，随着γ辐照剂量的增加，微孔体积大幅增加。在电化学方面，经100 kGy预处理的水葫芦制备的活性炭比电容显著增加，达到257.82 F/g，相较于未处理的活性炭的95.35 F/g有显著改善，并且在7000次循环后仍保持99.40%的电容。这些发现表明，γ预处理的生物质是制备高性能超级电容器电极的有前途的前驱体，为储能技术发展提供了一种可行且环保的替代方案。
