纳米金刚石负载Fe2O3的制备及其对高氯酸氨的热分解催化作用

对纳米金刚石（ND）进行羧基化处理以提高其分散性，然后采用沉淀法制备了羧基化ND负载Fe₂O₃的催化剂。利用XRD、TG、BET和TEM对该负载型催化剂进行表征，通过DSC研究其对高氯酸铵(AP)热分解的催化作用。结果表明:ND经过羧基化处理后,在水中的分散性大幅度提高。沉淀法制备了直径5 nm、长50 nm的Fe₂O₃包裹或附着于ND的负载型复合催化剂，该催化剂对AP高温热分解的催化效果优于单一的Fe₂O₃或ND。当Fe₂O₃和ND的质量比为5∶1、在AP中添加质量分数2%的复合催化剂时，AP的高温分解峰温降低约30 ℃，ND负载Fe₂O₃催化剂具有一定的协同催化作用。

Preparation of Fe2O3/Nanodiamond Composite Particle and Its Catalytic Effect on Thermal Decomposition of Ammonium Perchlorate

Nanodiamond was carboxylated to improve its dispersability. Then, the carboxylate nanodiamond catalyst supported by Fe₂O₃ was prepared by precipitation method. The load-type catalyst was characterized by XRD, TG, BET and TEM, and its catalytic effect on the thermal decomposition of ammonium perchlorate (AP) was studied by DSC. The results show that, after carboxylation, the dispersibility of nanodiamond in water increases significantly. The load-type catalyst, that Fe₂O₃ with a diameter of 5 nm and a length of 50 nm coats or attaches to nanodiamond, was prepared by precipitation method. Catalytic effect of the load-type catalyst prepared by precipitation method on the thermal decomposition of AP is better than that of single Fe₂O₃ or nanodiamond. When the mass ratio of Fe₂O₃ to nanodiamond is 5∶1 and the mass fraction of catalyst added in AP is 2%, the decomposition peak temperature of AP decreases by 30 ℃. Nanodiamond and Fe₂O₃ has a certain synergistic catalysis.