摘要
采用浸渍法制备出纳米NiO/MgO复合氧化物粒子,运用X射线衍射(XRD)、X射线能谱仪(EDS)等对产物的物相和组成进行了表征,并研究了单一纳米粒子(NiO、MgO)、纳米NiO+MgO混合粒子及纳米NiO/MgO复合氧化物粒子对AP热分解的催化性能。结果表明,所制备的纳米NiO/MgO复合氧化物粒子中NiO粒子高度分散于MgO载体中。纳米NiO/MgO复合氧化物粒子可使AP的高温分解峰温降低92.2℃,高低温分解峰温差减小到10.6℃,表现出较强的催化性能,其催化性能优于单一纳米粒子(NiO、MgO)、纳米NiO+MgO混合粒子。纳米MgO的载体支撑作用,可防止NiO纳米粒子的团聚,增加反应活性中心,从而提高催化效果。
The nanometer NiO/MgO composite particles were prepared via impregnation method.The phase and morphology of NiO/MgO composites were characterized by X-ray diffraction,transmission electron microscopy and energy dispersive X-Ray spectroscopy.The catalysis of nanometer particles（NiO,MgO）,NiO＋MgO mixture particles and NiO/MgO composite particles the thermal decomposition of ammonium perchlorate（AP） was investigated by DSC.The Results show that NiO particles are highly dispersed on the MgO support.Catalytic performance of the obtained nanometer NiO/MgO composite particles is superior to that of corresponding single ingredient and NiO＋MgO mixture particles.Nanometer NiO/MgO can make the high-temperature decomposition peak value of AP decrease by 92.2 ℃ and the temperature difference value between the low and high temperature decomposition peak reduce up to 10.6 ℃,which indicates good catalytic performance.The supporting effect of the nanometer MgO can effectively prevent the aggregation of NiO particles and increase the active sites.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2011年第2期214-219,共6页
Journal of Solid Rocket Technology
基金
国家自然科学基金资助项目(50972060)
江苏省2009年度普通高校研究生科研创新计划资助项目(CX09B_095Z)
南京理工大学自主科研专项计划资助项目(2010ZYTS015)
作者简介
谈玲华（1978-），女，博士生，主要从事纳米材料的制备及催化性能研究。E-mail：tanlinghua@njit．edu．cn
