摘要
采用溶胶-凝胶法制备了Y2O3/纳米碳管复合粒子,并用SEM,XPS,FT-IR和XRD对Y2O3/纳米碳管复合粒子的形貌和微观结构进行了表征.结果表明,纳米碳管有效承载了Y2O3,Y2O3连续均匀地负载在纳米碳管的表面,负载量为19.53%.FT-IR和XPS证明了Y2O3粒子和纳米碳管表面之间发生了化学键合.用三种方法将相同比例的Y2O3/纳米碳管复合粒子与高氯酸胺(AP)进行混合,采用差热分析(DTA)研究了三种混合样品中Y2O3/纳米碳管复合粒子对高氯酸铵热分解的催化性能.结果表明,三种混合样品中的Y2O3/纳米碳管复合粒子都能催化高氯酸铵的热分解,其中通过水溶剂混合的样品中Y2O3/纳米碳管复合粒子的催化效果优于另外两种.与纯高氯酸铵相比,其样品中高氯酸铵的高温分解峰温降低了168.5℃,表观分解热由371J?g-1提高到1410J?g-1.并用不同样品中高氯酸铵热分解动力学参数对所得结果进行了理论分析.
Y2O3/carbon nanotube composite particles were prepared by a sol-gel method. The microstrcture and looks of the composite particles obtained were characterized by SEM, XPS, FT-IR and XRD methods. The results indicate that Y2O3 are supported well on the surface of carbon nanotube. The Y2O3 particles coating on carbon naotube appear even and continous. This points to high nucleation density and big binding energy. FT-IR and XPS reveal that Y2O3 particles are coated with carbon nanotube through chemical bond. Three comparison samples mixing YEOa/carbon nanoube composite particles with ammonia perchlorate （AP） by three mixing methods were prepared. And DTA experiments were used to characterize their catalytic performance. The results imply that the catalytic performance of YEOa/carbon nanotube composite particles in the sample mixing by water phase is superior to that of the other. Compared with the pure ammonia perchlorate, the peak temperature of high temperature decomposition of AP in this mixing sample decreases 168.5℃, and the total heat release improves from 371 to 1410J·g^-1. The kinetics parameters of the thermal decomposition of AP in different samples were investigated to explain the above results.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2006年第15期1548-1552,共5页
Acta Chimica Sinica
