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微纳米多孔碳质材料的表面修饰及苯酚吸附性能
作者:刘成宝1 2 陈志刚1 2 3 4 陈丰1 2 曹煜2 顾诚4 吴正颖1 2 
单位:1. 苏州科技学院 江苏省环境功能材料重点实验室 江苏 苏州 215009 2. 苏州科技学院化学与生物工程学院 江苏 苏州 215009 3. 晶体材料国家重点实验室 山东大学 济南 250100 4. 江苏大学材料科学与工程学院 江苏 镇江 212013 
关键词:微纳米多孔碳质材料 膨胀石墨 活性炭 表面修饰 
分类号:TB332
出版年,卷(期):页码:2012,40(4):776-776
DOI:
摘要:

  要:采用不同修饰工艺对微纳米多孔碳质材料进行处理,考察了修饰前后材料表面官能团的变化及其对苯酚吸附能力的影响,并结合Boehm滴定、Fourier变换红外光谱仪和X射线光电子能谱对材料表面官能团进行表征。结果表明:经高温(800 )和尿素修饰后,材料的比表面积分别下降了41.9%19.6%,苯酚吸附性能分别提升了21.2%37%;经硝酸预改性的样品表面存在大量的羧基和酚羟基酸性基团,尿素改性时更利于吡啶和吡咯结构的生成

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Abstract: A micro-nano porous carbon material (MNC) was modified by different methods. The effect of surface functional groups on the phenol adsorption capacity was investigated by the Boehm titration, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, respectively. The results show that after heat treatment at a high temperature (800 ) and urea modification, the specific surface areas of the MNC are decreased by 41.9% and 19.6%, respectively, and the phenol adsorption capacities are increased by 21.2% and 37%, respectively. For the modification by nitric acid followed by urea, the presence of acidic groups (particularly for carboxyl and phenolic hydroxyl groups) improved the surface defects of graphite microcrystalline, which could favor the implant of nitrogen-containing functional groups, especially for the generation of pyridine and pyrrole.

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