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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。
Cetyltrimethylammonium bromide (CTAB) was used as a template and soluble starch (Starch) was used as a carbon source. One-step synthesis of highly ordered mesoporous carbon materials by soft template method. The structure of the material was characterized by TG, XRD, N2 adsorption-desorption and transmission electron microscopy (TEM). The results show that when m (template CTAB): m (soluble starch) = 1.0:1.5, calcined at 350 ℃ for 3 h and the silica is removed by hydrofluoric acid, the obtained MCM-41 ordered mesoporous carbon material (OMC-650) has a specific surface area of 985 m2 / g, an average pore diameter of 2.5 nm, and a uniform pore size distribution. The results of XRD and TEM analysis show that OMC-650 has typical MCM-41 structure and good orderliness. Using OMC-650 as the working electrode, mercuric oxide as the reference electrode and platinum as the auxiliary electrode, the specific capacitance was measured to be 150 F / g with 6 mol / L KOH. After 1 000 charge and discharge cycles, The specific capacitance is still 138 F / g, 92% of the original capacitance, indicating that the synthesized material has good capacitance stability.