制备了一种单壁碳纳米管担载金纳米颗粒复合材料,利用X射线衍射、扫描透射显微镜、能量色散X射线分析、比表面积分析、激光拉曼光谱和紫外-可见分光光度计等对其结构进行了表征.结果表明:纳米金粒为微晶体,其平均直径为7nm且直径分布范围较窄.研究了该单壁碳纳米管担载金颗粒对仲醇的无溶剂氧化的活性和选择性,发现其转化效率可达95％.
A single-walled carbon nanotube-supported gold nanoparticle composite was prepared and characterized by X-ray diffraction,scanning transmission electron microscopy/scanning electron microscopy/transmission electron microscopy,energy-dispersive X-ray analysis,atomic absorption spectroscopy,nitrogen adsorption,Raman spectroscopy,and ultraviolet-visible spectroscopy.The Au particles were found to be crystalline,with a well-defined and narrow particlesize distribution,centered around 7 nm.The activity and selectivity of the composite for solventless aerobic oxidation of a secondary alcohol were examined,and a conversion efficiency of 95％ was obtained.
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