铜
催化作用
扫描电子显微镜
化学
乙二醇
透射电子显微镜
溶剂
乙酰丙酮
形态学(生物学)
溶剂热合成
化学工程
无机化学
高分子化学
材料科学
有机化学
纳米技术
生物
工程类
复合材料
遗传学
作者
Xin Chen,Lihua Jia,Yingli Wang,Lianying Song,Yongxia Zhu,Wuyuan Liu,Ziyi Zhong,Fabing Su
标识
DOI:10.1016/j.jcis.2013.04.028
摘要
CuCl microcrystals with different morphologies such as tetrahedra, etched tetrahedra, tripod dendrites, and tetrapods were synthesized using CuCl2⋅2H2O as the copper precursor in the mixed solvent of acetylacetone and ethylene glycol. The samples were characterized with X-ray diffraction, scanning electron microscopy, infrared spectroscopy, and transmission electron microscope. Cu(C5H7O2)2 was identified as the key intermediate, and the morphology and structure of the CuCl microcrystals were highly dependent on the reaction time and temperature, as well as the volume of the solvents. The catalytic properties of these CuCl microcrystals were explored in the dimethyldichlorosilane synthesis via Rochow reaction. Compared to the commercial CuCl microparticles with irregular morphology and dense internal structure, the obtained CuCl microcrystals possessed regular morphology and different exposed crystal planes and showed much higher dimethyldichlorosilane selectivity and Si conversion via the Rochow reaction because of the enhanced formation of active CuxSi phase and gas transportation within the dendritic structure, demonstrating the significance of regular morphology of the copper-based catalysts in catalytic organosilane synthesis.
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