MCM-41介孔碳材料的合成及其电化学性能  

Synthesis of MCM-41 Mesoporous Carbon Materials and Their Electrochemical Performance

作　　者：宋伟明[1] 徐立洋[1] 孙立[1] 邓启刚[1] 冯建[1] 程晓宇[1] SONG Wei-ming XU Li-yang SUN Li DENG Qi-gang FENG Jian CHENG Xiao-yu(College of Chemistry and Chemistry Engineering, Qiqihar University, Qiqihar 161006, Heilon~iang, China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《精细化工》2017年第2期128-133,共6页Fine Chemicals

基　　金：黑龙江省自然科学基金(No.B201010;B2015014);齐齐哈尔大学研究生创新科研项目(No.YJSCX2014-011X)~~

摘　　要：以十六烷基三甲基溴化铵(CTAB)为模板剂,可溶性淀粉(Starch)为碳源,通过软模板法一步合成了高度有序的介孔碳材料。通过热重分析(TG)、X射线衍射(XRD)、N2吸附-脱附和透射电子显微镜(TEM)对材料的结构进行了表征。结果表明:当m(模板剂CTAB)∶m(可溶性淀粉)=1.0∶1.5,650℃焙烧碳化3 h,并用氢氟酸去除二氧化硅后,所得到的MCM-41有序介孔碳材料(OMC-650)的比表面积为985 m2/g,平均孔径为2.5nm,且孔径分布均匀。XRD和TEM分析结果表明,OMC-650具有典型的MCM-41结构特征,有序性良好。以OMC-650作为工作电极,氧化汞为参比电极,铂为辅助电极,用6 mol/L KOH做电解液,测其比电容为150 F/g,且经过1 000次充放电循环后,其比电容仍为138 F/g,为原电容的92%,说明所合成的材料具有良好的电容稳定性。A highly ordered mesoporous carbon material was synthesized by a soft template method with hexadecyltrimethylammonium bromide（CTAB） as a template and soluble starch（Starch） as a carbon source. The structures of the resultant materials were characterized by thermal gravimetric analysis（TG）,X-ray diffraction（XRD）,N2adsorption-desorption isotherms and transmission electron microscopy（TEM）. The results showed that MCM-41 ordered mesoporous carbon material（OMC-650） was obtained when the mass ratio of CTAB to Starch was 1. 0 ∶1. 5,carbonized for 3 h at 650 ℃,and then removing the silica with hydrofluoric acid. OMC-650 possessed specific surface area of 985 m2/g and average pore diameter of 2. 5 nm and exhibited a uniform distribution. XRD and TEM analysis showed that OMC-650 possesses a typical MCM-41 structural feature with high ordered structure. The electrochemical tests were conducted in a three-electrode system in 6 mol/L KOH solution. When OMC-650 was used as a working electrode,mercury oxide electrode was used as a reference electrode,and Pt wire electrode served as an auxiliary electrode. The specific capacitance of OMC-650 reached 150 F/g.The specific capacitance retention rate reached 92% even after one thousand charge-discharge cycles（138 F/g）,demonstrating that OMC-650 had excellent capacitance stability.

关 键 词：介孔碳材料 软模板法 超级电容器 双电层电容 功能材料 

分 类 号：TB383[一般工业技术—材料科学与工程] O646[理学—物理化学]