摘要
以正硅酸乙酯(TEOS)为原料、氧化碳纳米管(CNTs-COOH)为添加物,采用溶胶–凝胶法,经表面改性、高温还原制备碳纳米管/SiO_2气凝胶(CS).通过傅里叶变换红外光谱(FTIR)、BET等进行表征,采用最佳比例的CS研究其对水溶液中甲苯的吸附性能.结果表明:掺杂3%,CNTs-COOH的CS(3%,CS)的松散堆密度为170,kg/m^3,比表面积、平均孔径分别为1,021,m^2/g、15.39,nm,对水溶液中甲苯的最大饱和吸附量为203,mg/g,且吸附过程符合Langmuir等温吸附模型.
With tetraethoxysilane(TEOS)as the raw material,and the oxidized carbon nanotubes(CNT-COOH)as the additive,CNTs/SiO_2 aerogels(CS)were prepared with the sol-gel method,and then given surface modification and high temperature treatment.Fourier Transform Infrarespectroscopy(FTIR)and BET were used to characterize the as-synthsized aerogels,and adsorption experiments using optimized CS to adsorb toluene in aqueous solution were carried out.The results show that the bulk density of CS with 3%, CNTs-COOH is 170 kg/m^3,its specific surface area and average pore diameter are 1,021,m^2/g and 15.39,nm,respectively,and the maximum saturated adsorption capacity of 3%,CS for toluene in aqueous solution was 203,mg/g.The adsorption process was in accordance with the Langmuir isotherm model.
作者
张潇
彭瑜洲
李朝宇
赵磊
吕佳佳
彭啸
吴燕
ZHANG Xiao;PENG Yuzhou;LI Chaoyu;ZHAO Lei;Lü Jiajia;PENG Xiao;WU Yan(College of Chemical Engineering and Materials Science,Tianjin University of Science & Technology,Tianjin 300457,China)
出处
《天津科技大学学报》
CAS
2018年第3期51-56,共6页
Journal of Tianjin University of Science & Technology
基金
国家自然科学基金资助项目(21107080)
天津市大学生创新创业训练计划资助项目(201610057143)