表面改性对活性炭孔结构及热电转换性能的影响

发布时间：2018-03-07 07:09

  本文选题：活性炭　切入点：表面改性　出处：《复合材料学报》2017年05期 　论文类型：期刊论文

【摘要】：为探究表面改性对活性炭孔结构及热电转换性能的影响,使用HNO_3和KOH在不同条件下对活性炭进行表面改性,用N2吸附法和XRD图谱表征活性炭改性前后孔结构和石墨化程度的变化。结果表明,改性后活性炭的比表面积和孔容提高,平均孔径减小,并存在石墨晶体结构。干法改性活性炭的比表面积和总孔容由1 077.880m~2/g和0.763cm~3/g分别增加到1 635.268m~2/g和1.128cm~3/g,并且微孔的孔容增加。改性处理可以去除活性炭中的杂质。分别以改性前后活性炭为材料制备固体电极,KCl为电解液,测试活性炭电极的热电转换性能,发现改性后活性炭具有更高的热电转换性能。
[Abstract]:In order to investigate the surface modification effect on pore structure and thermoelectric conversion activity, the use of HNO_3 and KOH under different conditions on the activated carbon surface modification, modification of pore structure and the graphitization degree of N2 adsorption and XRD spectrum characterization of activated carbon. The results show that the specific surface area and improve Kong Rong the modified activated carbon, the average pore size decreases, and the existence of graphite crystal structure. The dry modification of activated carbon surface area and total pore volume by 1 077.880m~2/g and 0.763cm~3/g were increased to 1 635.268m~2/g and 1.128cm~3/g, and the micro pore volume increased. The modification can remove impurities in activated carbon to change respectively. The activated carbon materials for the preparation of solid KCl electrode, electrolyte, thermoelectric conversion performance test of activated carbon electrode, we found that the modified activated carbon has higher thermoelectric conversion performance.

【作者单位】： 西安交通大学机械结构强度与振动国家重点实验室;哥伦比亚大学地球与环境工程系;
【基金】：国家自然科学基金(11302163;11572239;11572238;11372241) 陕西省自然科学基金(2015JM1021)
【分类号】：TM61;TQ424.1
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本文编号：1578422