铜/纳米金刚石复合物的结构及其对高氯酸铵热分解的催化作用

查看全文 作　　者：[1]石晓琴;[1]江晓红;[1]陆路德;[1]杨绪杰;[1]汪信;Vasilii A [2]Struk

机构地区：[1]南京理工大学材料化学教研室,南京210094;[2]格罗德拉国立大学材料与资源保护研究所

出　　处：《无机化学学报》索引2006年第22卷第2期,共5页

基　　金：国家自然科学基金资助项目(No.5042047);江苏省自然科学基金项目(No.BK2003096);江苏省国际科技合作项目(No.BZ2005009);国防科工委重点科技基础研究项目(No.K17040610117) 摘　　要：Nano-Copper and Cu/UDD (ultradispersed diamond) nanocomposites were separately prepared by reduction of CuCl2 aqueous solution and that doped with 0.7%(weight percent) of ultra-dispersed diamond. The as prepared nano-crystals were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and electron paramagnetic resonance techniques (EPR). It was found that homogeneous nucleation dominated the aqueous reduction reaction at high concentration and the diameter of nano-copper decreased as the reaction time shortened, yet at lower concentration heterogeneous nucleation predominated and the doped UDD functioned as heterogeneous nucleation. Otherwise large number of free-radicals existed in the nano-composites. Both of nano-copper and Cu/UDD nanocomposites were strong catalysts for AP decomposition, with Cu/UDD being a more effective one. The higher decomposition temperature for AP was 119 ℃ lower than that without catalyst. And the exothermic quantity of decomposition was from 590 J·g-1 to 1 400 J·g-1 by mix 2% of the Cu/UDD nanocomposites. 关键词：纳米铜纳米金刚石高氯酸铵催化

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铜/纳米金刚石复合物的结构及其对高氯酸铵热分解的催化作用

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