氮掺杂碳气凝胶电极材料的制备及其结构表征  

Fabrication of N-dope carbon aerogel electrodes and their structure characterization

作　　者：常丽娟[1,2] 付志兵[2] 袁磊[2] 韦建军[1] 刘西川[3] 唐永建[2] 王朝阳[1] 

机构地区：[1]四川大学原子与分子物理研究所,四川成都610065 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]西华大学材料科学与工程学院,四川成都610039

出　　处：《功能材料》2013年第B06期149-152,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51101141);等离子体物理重点实验室资助项目(9140C680502110C6807)

摘　　要：以间苯二酚和甲醛为反应前驱体,三聚氰胺为氮源,经溶胶-凝胶法制备出氮掺杂碳气凝胶(N-CA),并对其进行CO2活化,扫描电子显微镜(SEM)测试表明,经CO2活化后的氮掺杂碳气凝胶(N-ACA),其骨架结构发生较明显变化,孔尺寸明显减小;氮吸附数据表明,CO2活化能够较好地起到造孔的作用,N-ACA的比表面积高达4082m2/g;热重曲线(TG和DTG)说明CO2与N-CA的反应主要从650℃开始,当温度升至1150℃时失重速率达到最大,选取最适宜的活化温度范围为800～1000℃;X光电子能谱(XPS)和元素分析测试表明,与N-CA相比较,N-ACA具有的氮原子百分含量明显减少,但供电子能力较强的吡咯氮含量有所增加。Activated N-doped carbon aerogel （N-ACA） was synthesized via sol-gel polycondensation and the mel amine is employed as N-containing precursor followed by pyrolysis under Ar flow, then the carbonized deriva- tive was activated in C（）2 atmosphere. The surface morphology and porous texture structure are analyzed by using scanning electron microscopy （SEM） and N2 adsorption at 77K, it reveals that the skeleton framework of N-ACA has much change comparable to N-CA and the specific surface area was up to 4082m2/g. The burn-off degree of N-CA in CO2 atmosphere was investigated by thermogravimetrc analysis （TG）. The results are the reaction between CO2 molecule and N-CA occurs at about 650C, the rate of weight loss reaches a maximum at 1150C, the suitable temperature range was choosen from 800 to 1000C. The contained nitrogen o[ surface and monolith was tested by X-ray photoelectron spectroscopy （XPS） and elemental analysis. It was shown that the nitrogen concentration of N-ACA decreases, while the presence of pyridinic nitrogen increase, the increased pyr idinic nitrogen beneficial to improve the capacity of donor electron.

关 键 词：氮掺杂碳气凝胶 CO2活化 比表面积 孔结构 含氮官能团 

分 类 号：TQ177[化学工程—硅酸盐工业]