摘要
以碳纳米管为载体,采用化学沉淀法制备了Co_3O_4/CNTs复合粒子。使用透射电子显微镜(TEM)、X衍射(XRD)、扫描电子显微镜(SEM)、X射线能谱(EDS)、比表面积分析仪(BET)等手段对产物的结构、形貌、粒度和比表面积进行表征,并用差示扫描量热仪(DSC)研究了纳米Co_3O_4、纯CNTs及Co_3O_4/CNTs复合粒子对高氯酸铵(AP)及AP/HTPB推进剂热分解的催化效果。结果表明:Co_3O_4/CNTs复合粒子结晶好、包复均匀、比表面积大;此复合粒子可使AP和AP/HTPB推进剂的高温分解峰分别降低153.06℃和60.0℃,使总表观分解热分别增加了1063 J/g和920 J/g,表现出显著的催化性能,其催化性能明显优于纯纳米Co_3O_4和纯CNTs。
Co3O4/CNTs composite particles were prepared by direct chemical deposition method using carbon nanotube as carrier, and its structure, morphology, particle size and surface area were characterized by XRD, SEM, EDS and BET. The catalytic effects of Co3O4/CNTs composite particles on the thermal decomposition of AP and AP/HTPB propellant were investigated by DSC. The results show that Co3O4/CNTs composite particles with good crystal form, uniform coating and large specific surface area could be obtained by the experiments. The particles could decrease the high temperature decomposition peak of AP and AP/HTPB propellant by 153.06℃ and 60.0℃ respectively, and increase the DSC heat release by 1063 J/g and 920 J/g, showing evident catalytic effects on the thermal decomposition of AP and AP/HTPB propellant. The catalytic activities of Co3O4/CNTs composite particle are obviously better than those of pure nano Co3O4 and CNTs. Due to the unique structure and support function of carbon nanotube, Co3O4/CNTs composite particle show better catalytic activities than pure Co3O4.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A03期649-653,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目(50306008)
