碳包覆碳化钛壳／核型纳米材料制备及其电催化性能  

Preparation and Electrocatalysis of Carbon-coated Titanium Carbide Core-Shell Nanoparticles

作　　者：于瀛秀[1] 董星龙[1] 薛方红[1] 黄昊[1] 谢昌江[1] 刘璐[2] 于洪涛[2] 全燮[2] 

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]大连理工大学化工与环境生命学部,辽宁大连116024

出　　处：《纳米科技》2013年第1期59-63,共5页

基　　金：基金项目：国家重点基础研究发展计划（973计划）项目（2011CB936002）

摘　　要：采用直流电弧等离子体法，在甲烷和氢气混合气氛下蒸发块体钛，制备出碳包覆碳化钛（C@TiC）壳／核型纳米结构粒子，利用x射线衍射仪、拉曼光谱仪和透射电子显微镜进行了物相、结构及形貌表征，结果表明，所制备的纳米粒子为碳包覆碳化钛结构，其碳包覆层厚度约1nm，部分纳米粒子呈现规则的六棱形貌。利用涂层法将碳包覆碳化钛纳米粉体制成电极，并通过循环伏安测试及电化学降解2，4－二氯酚实验，研究了碳包覆碳化钛纳米粒子的电化学性能及有机物降解性能。在一定负压范围内，碳包覆碳化钛纳米材料电极的降解效率随着负向电压的增大而增大；当电压为－1．0v时，其降解速率为8．55mg／（L·h）；当电压为-0．5v时，降解速率为7．57mg／（L·h）。Carbon-coated titanium carbide（C@TiC） nanoparticles were fabricated by evaporating Ti bulk through DC are- discharge method under a mixture atmosphere of methane and argon. The composition, structure and morphology of the resulting nanoparticles were characterized by XRD, Raman and TEM （HR-TEM）. It was found that parts of the nanoparticles were in the hexagonal morphologies and the thickness of carbon layer on the particles was almost thinner than lnm. The electrochemical and electrocatalytic properties of C@TiC nanoparticles electrode prepared by the coating method were measured with cyclic vohammetry tests and electrocatalytic degradation. The results indicate that the degra- dation efficiency of 2,4-DCP by C@TiC nanoparticles electrode increased with rise of negative voltage. As the voltages were set as -1.0V and -0.5V, the degradation rates were 8.55mg/（L·h） and 7.57mg/（L·h）, respectively.

关 键 词：直流电弧等离子体法 碳包覆碳化钛壳 核型纳米粒子 2 4-二氯酚 降解 

分 类 号：TB34[一般工业技术—材料科学与工程]