摘要
用溶剂 -非溶剂法制备了纳米Fe2 O3 /高氯酸铵 (AP)复合粒子 ,并用TEM ,SEM ,XRD和ICP对其进行了表征 .为了研究纳米复合粒子中纳米Fe2 O3 对AP热分解的催化性能 ,将相同比例的微米Fe2 O3 和纳米Fe2 O3 与AP分别简单混合后作对比 ,并用DTA对三种样品进行了热分析 .结果表明 ,三种样品中的Fe2 O3 粒子都能催化AP的热分解 ;但纳米Fe2 O3 粒子的催化性能优于微米Fe2 O3 粒子 ,纳米Fe2 O3 /AP复合粒子中纳米Fe2 O3 对AP的催化性能优于纳米Fe2 O3 与AP简单混合物 .与纳米Fe2 O3 与AP简单混合的样品相比 ,纳米复合粒子中的AP高温分解峰温降低 2 0 .1℃ ,低温分解峰几乎消失 ,表观分解热由 85 0 .2J/g提高到 10 80 .8J/g .证明纳米Fe2 O3 与AP的复合处理能显著提高纳米Fe2 O3 对AP热分解的催化性能 .
The Fe2O3/ammonium perchlorate (AP) composite nanoparticles have been prepared by a novel solvent-nonsolvent method. The composite particles obtained have been characterized by TEM, SEM, XRD and ICP. To analyze the catalytic effect of nanometer-sized Fe2O3 particles on the thermal decomposition of AP in the composite particles, the comparison samples by simply mixing micrometer-sized Fe2O3 particles and nanometer-sized Fe2O3 particles with AP respectively have been prepared and DTA experiments were used to characterize their catalytic performance. It is shown that the catalytic performance of nanometer-sized Fe2O3 particles is superior to that of micrometer-sized Fe2O3 particles, and the nanometer-sized Fe2O3 particles in the composite particles exhibit the best catalytic performance on the thermal decomposition of AP. Compared with the simply mixed sample of nanometer-sized Fe2O3 particles and AP, the peak temperature of high temperature decomposition of Fe2O3/AP composite nanoparticles decreases 20.1 degreesC, and the total heat release improves from 850.2 J/g to 1080.8 J/g. Fe2O3/AP composite nanoparticles can improve the catalytic performance of nanometer-sized Fe2O3 particles on the thermal decomposition of AP. 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
2004年第13期1252-1255,J004,共5页
Acta Chimica Sinica
