目的 制备一种TiO2/CNTs复合粒子，并研究它对高氯酸铵热分解的催化作用。方法 以钛酸丁酯为钛源、乙酰丙酮为稳定剂，在常温下制备了钛溶胶，之后又以浓酸处理后的碳纳米管为载体，在常压和80 ℃下，用溶胶回流法制备了TiO2/CNTs纳米复合粒子。采用X射线衍射仪测定了复合粒子的晶体组成，采用透射电镜观察了复合粒子的表面形貌，采用红外光谱和X射线光电子能谱对复合粒子的表面官能团和元素组成进行了表征，并利用热分析仪考察了其对高氯酸铵热分解的催化作用。结果 经浓酸处理后，碳纳米管表面增加了羟基、羧基等活性官能团，生成的TiO2呈颗粒状包覆在碳纳米管表面，厚度约为2~4 nm，复合粒子中TiO2晶型为锐钛矿和金红石的混晶。TiO2/CNTs复合粒子对高氯酸铵的热分解具有显著的催化作用，使高氯酸铵的高温分解峰温度降低了52.5 ℃，并由吸热状态转变为放热状态，低温分解峰几乎消失。结论 制备的TiO2/CNTs复合粒子能促进高氯酸铵的热分解，且其催化效果明显优于纳米TiO2、CNTs以及二者的简单混合物。

The work aims to prepare TiO2/CNTs composite particles and study their catalytic performance on the thermal decomposition of ammonium perchlorate. The Ti-sol was prepared at ambient temperature with the tetrabutyl orthotitanate and acetylacetone as titanium source and stabilizer respectively. Then, the TiO2/CNTs composite particles were prepared by sol-reflux method at 80℃ under normal pressure with modified carbon nanotubes as carrier. The crystals of composite particles were determined by XRD, the surface morphology was observed by TEM and the surface functional group and element composition were characterized by FT-IR and XPS. The catalytic performance of the TiO2/CNTs on the thermal decomposition of AP was investigated by TG-DSC analysis. From the results, the hydroxyl and carboxyl functional groups were abound on the surface of carbon nanotubes after modified with concentrated acid. TiO2 nanoparticles were attached on carbon nanotubes with thickness of 2~4 nm. Crystal forms of TiO2 in composite particles were mixed with anatase and rutile. TiO2/CNTs nanoparticles had significant catalyst performance on the thermal deposition of AP and could remarkably decrease the peak temperature of high temperature decomposition of AP by 52.5 ℃. Then, the exothermic peak changes from endothermic peak and the low temperature decomposition peak almost disappeared. TiO2/CNTs nanoparticles can promote the thermal decomposition of AP and have better catalytic performance than that of TiO2, CNTs and their mixture.