CAJ | 학술논문

采用微乳液法制备了立方晶系的NdCoO_3纳米晶.利用DSC/TG-MS研究了NdCoO_3对AP热分解的催化作用.结果表明,在NdCoO_3的催化作用下,AP的热分解反应峰值温度下降了113℃,表观分解反应热从655 J·g~(-1)增加到1 363 J·g~(-1),分解的气相产物主要有NH3,H_2O,O_2,HCl,N_2O,NO,NO_2和Cl_2.在金属氧化物表面吸附生成超氧化离子(O_2~-)和氧离子(O~-,O~(2-)),这是加速AP分解反应的主要原因.加入NdCoO_3催化AP热分解,由于对氨的氧化深度不同而导致分解放热量的增加.
채용미유액법제비료립방정계적NdCoO_3납미정.이용DSC/TG-MS연구료NdCoO_3대AP열분해적최화작용.결과표명,재NdCoO_3적최화작용하,AP적열분해반응봉치온도하강료113℃,표관분해반응열종655 J·g~(-1)증가도1 363 J·g~(-1),분해적기상산물주요유NH3,H_2O,O_2,HCl,N_2O,NO,NO_2화Cl_2.재금속양화물표면흡부생성초양화리자(O_2~-)화양리자(O~-,O~(2-)),저시가속AP분해반응적주요원인.가입NdCoO_3최화AP열분해,유우대안적양화심도불동이도치분해방열량적증가.
Cubic structural perovskite NdCoO_3 nanocrystals were prepared by microemulsion method. The catalytic effect of the NdCoO_3 for thermal decomposition of ammonium perchlorate (AP) was investigated by DSC and TG-MS. The results revealed that the NdCoO_3 nanoparticles had effective catalysis on the thermal decomposition of AP. Adding 2% of NdCoO_3 nanoparticles to AP decreased the temperature of thermal decomposition by 113 ℃ and increased the heat of decomposition from 655 J·g~(-1) to 1 363 J·g~(-1). Gaseous products of thermal decomposition of AP were NH_3, H_2O, O_2, HCl, N_2O, NO, NO_2 and Cl_2. The mechanism of catalytic action was based on the presence of superoxide ion (O_2~-) and oxygenic ion (O~-, O~(2-)) on the surface of NdCoO_3, and the difference of thermal decomposition of AP with 2% of NdCoO_3 and pure AP was mainly caused by the different extent of oxidation of ammonium.