Zhang Qiaohong, Chen Chen, Wang Min, Cai Jiaying, Xu Jie, Xia Chungu
State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
Nanoscale Res Lett. 2011 Nov 8;6(1):586. doi: 10.1186/1556-276X-6-586.
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.
采用改进的反相微乳液法成功制备了高度分散的钴-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射线吸收光谱近边结构以及N₂吸附-脱附测量等手段对该材料进行了详细表征。无需煅烧就能轻松获得高价态钴，因其强大的氧化能力，这在催化应用中极具吸引力。在环己烷的选择性氧化反应中，Co-SiO₂作为一种高效催化剂，在温和条件下可获得良好的活性。
