纳米铜铬复合氧化物对RDX热分解的催化作用

Catalysis of nanocomposite CuO·Cr_2O_3 on thermal decomposition of RDX

为了研究纳米CuO·Cr2 O3复合物的催化性能 ,采用室温固相化学反应法制备出不同铜、铬质量比的纳米CuO·Cr2 O3复合物 ,测出产物的粒径约为 15nm。用DSC测试了纳米CuO·Cr2 O3复合物对RDX热分解的催化作用。结果表明 :纳米CuO·Cr2 O3复合物对RDX热分解有较好的催化效果 ,它使RDX的分解峰温提前了 11 1℃ ,活化能降低了 17kJ mol,其作用明显优于纳米CuO和纳米Cr2

Nanocomposite oxide CuO·Cr 2O 3 with different mass ratio of Cu and Cr was synthesized by solid state reaction method at room temperature, and dispersing agent was added to disperse nanometer particle. The particle size, crystal form, and phase were examined with XRD and TEM. Average particle size were about 15 nm. The catalytic performance of nanocomposite oxide CuO·Cr 2O 3 was determined by DSC. The results show that the peak temperature of thermal decomposition of RDX decrease 11 1℃, under the effect of nanocomposite oxide CuO·Cr 2O 3, and the apparent activation energy of the thermal decomposition of RDX decrease 17kJ/mol. The catalytic action of nanocomposite oxide CuO·Cr 2O 3 is better than that of nanometer Cr 2O 3 and its mixture.