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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
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)
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
N-dope carbon aerogel
CO2 activation
specific surface area
porous texture
nitrogen functionalities
作者简介
常丽娟（1987一），女，山西大同人，在读硕士，师承王朝阳副研究员，从事超级电容器电极材料研究。
通讯作者：王朝阳
