Fe_2O_3纳米粒子的醋酸改性对其催化高氯酸铵热分解的影响

Effect of Surface-modification of Fe_2O_3 Nanoparticles by Acetic Acid on their Catalytic Activity for the Thermal Decomposition of Ammonium Perchlorate

利用表面改性法对Fe2 O3纳米粒子进行醋酸改性 ,用TEM和纳米粒度测试仪对Fe2 O3纳米粒子进行了形貌和粒度表征 ,用FTIR和XPS对改性后的Fe2 O3纳米粒子进行了结构表征 ,用DTA研究了醋酸改性处理对Fe2 O3纳米粒子的高氯酸铵 (AP)热分解催化性能的影响。结果表明 ,用凝胶 溶胶法制备了平均粒径为 4 0nm ,窄粒度分布的Fe2 O3纳米粒子 ,醋酸改性处理改善了Fe2 O3纳米粒子的分散性。FTIR和XPS结果表明 ,Fe2 O3纳米粒子与醋酸分子发生了化学键合。DTA结果表明 ,Fe2 O3纳米粒子的醋酸改性能提高Fe2 O3纳米粒子的AP热分解催化性能 ;随着Fe2 O3纳米粒子含量的增加 ,醋酸改性的效果越明显。

Fe_2O_3 nanoparticles modified by acetic acid were prepared using surface-modification method. TEM, Particle size analysis,FTIR and XPS were used to investigate the Fe_2O_3 nanoparticles and modified Fe_2O_3 nanoparticles. The results indicate the Fe_2O_3 nanoparticles with a narrow size distribution(40nm) are obtained with the gel-sol method. The acetic acid is bonded to the surface of Fe_2O_3 nanoparticles and acetic acid-modified Fe_2O_3 nanoparticles have good dispersive capacity. DTA experiments were used to study the effect of surface-modification of Fe_2O_3 nanoparticles on the thermal decomposition of ammonium perchlorate (AP). It is shown that the modification of Fe_2O_3 nanoparticles can achieve catalytic activity improvement on the thermal decomposition of AP. With the content of Fe_2O_3 nanoparticles increasing,the modified Fe_2O_3 nanoparticles indicate higher catalytic activity improvement on the thermal decomposition of AP.