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以TiCl4为原料,采用溶胶水解法合成了金红石型纳米TiO2颗粒,并以其为载体制备了WC/TiO2纳米复合材料.采用X射线衍射(XRD)、扫描电子显微镜(SEM)和X射线能谱(EDS)等手段分析了WC/TiO2纳米复合材料的晶相组成和表面形貌.结果显示样品是由WC,TiO2和W组成,纳米WC颗粒均匀地包覆在TiO2的表面,并与TiO2构成了WC/TiO2纳米复合材料.采用循环伏安法和计时电流法研究了WC/TiO2纳米复合材料对硝基苯的电催化性能.结果表明,WC/TiO2纳米复合材料对硝基苯的电催化活性和电化学稳定性均优于介孔结构碳化钨(meso-WC)和纳米WC颗粒(part-WC).
The Ti (Ⅳ) as the raw material, the rutile nano-TiO2 particles were synthesized by sol hydrolysis and the WC / TiO2 nanocomposites were prepared by XRD, SEM and X-ray energy dispersive spectroscopy (EDS) were used to analyze the crystal phase composition and surface morphology of the WC / TiO2 nanocomposites.The results show that the sample is composed of WC, TiO2 and W, the nano-WC particles are uniformly coated on the surface of TiO2 and form with TiO2 The electrocatalytic properties of WC / TiO2 nanocomposites were investigated by cyclic voltammetry and chronoamperometry. The results showed that the electrocatalytic activity of nitrobenzene on WC / TiO2 nanocomposite Both the activity and the electrochemical stability are better than those of mesostructured WC-WC and part-WC.