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Chitin derived biochar for efficient capacitive deionization performance

机译:几丁酸衍生的BioChar用于有效的电容去离子性能

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The selection and preparation of an electrode material is the core of capacitive deionization. In order to obtain a material with a good deionization properties, we have designed an environmentally-friendly and simple way of preparing biochar. In this work, biochar was prepared by a thermal-deposition method and after chemical modification it was characterized with a scanning electron microscope (SEM), Fourier transform infrared spectrophotometer (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The specific surface area of biochar modified by KOH is as high as 833.76 m ~(2) g ~(?1) , but the specific surface area of the unmodified electrode material is only 126.43 m ~(2) g ~(?1) . The electrochemical analysis (CV and EIS) of the biochar indicates that HC-800 has a lower charge transfer resistance and a higher specific capacitance, where the specific capacity of HC-800 reaches 120 F g ~(?1) . A CDI property analysis of HC-800 shows a better electrosorption capacity of 11.52 mg g ~(?1) and better regeneration and cycling stability than CS-800. The desalination amount remains 87.23% after several cycles.
机译:电极材料的选择和制备是电容去离子的核心。为了获得具有良好去离子性能的材料,我们设计了一种环境友好而简单的准备Biochar的方法。在这项工作中,Biochar通过热沉积方法制备,并在化学修饰后,其特征在于扫描电子显微镜(SEM),傅里叶变换红外分光光度计(FTIR),X射线衍射(XRD)和X射线光电子谱(XPS)。通过KOH改性的Biochar的比表面积高达833.76m〜(2)G〜(α1),但未改性电极材料的比表面积仅为126.43m〜(2)g〜(?1) 。 BioChach的电化学分析(CV和EIS)表示HC-800具有较低的电荷传递电阻和更高的特定电容,其中HC-800的比容量达到120 f g〜(α1)。 HC-800的CDI属性分析显示出更好的电吸收能力为11.52mg g〜(α1),比CS-800更好的再生和循环稳定性。几次循环后,淀粉量仍保持87.23%。

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