Facile preparation of highly-dispersed cobalt-silicon mixed oxide nanosphere and its catalytic application in cyclohexane selective oxidation.
Facile preparation of highly-dispersed cobalt-silicon mixed oxide nanosphere and its catalytic application in cyclohexane selective oxidation.
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DOI：
10.1186/1556-276x-6-586
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发表时间：
2011-11-08
影响因子：
--
通讯作者：
Xia C
中科院分区：
文献类型：
--
作者：
Zhang Q;Chen C;Wang M;Cai J;Xu J;Xia C
采用改进的反相微乳液法成功制备了高分散的钴硅混合氧化物[Co-SiO2]纳米球。通过X射线衍射、透射电子显微镜、傅里叶变换红外光谱、紫外-可见漫反射光谱、X射线吸收光谱近边缘结构和N2吸附-解吸测量对该材料进行了详细表征。高价态钴无需煅烧即可轻松获得，其强氧化能力使其在催化应用中具有广阔的前景。在环己烷的选择性氧化中，Co-SiO2是一种高效的催化剂，在温和的条件下可以获得良好的活性。
Highly dispersed cobalt-silicon mixed oxide [Co-SiO2] nanosphere was successfully prepared with a modified reverse-phase microemulsion method. This material was characterized in detail by X-ray diffraction, transmission electron microscopy, Fourier transform infrared, ultraviolet-visible diffuse reflectance spectra, X-ray absorption spectroscopy near-edge structure, and N2 adsorption-desorption measurements. High valence state cobalt could be easily obtained without calcination, which is fascinating for the catalytic application for its strong oxidation ability. In the selective oxidation of cyclohexane, Co-SiO2 acted as an efficient catalyst, and good activity could be obtained under mild conditions.