无定形碳包覆的TiO2纳米管阵列的制备及表征  

Preparation and Characterization of TiO2 Nanotube Arrays Coated with Amorphous Carbon

作　　者：刘佳孟 郭飞 张王刚[1,2] 王红霞[1,2] Liu Jiameng;Guo Fei;Zhang Wanggang;Wang Hongxia(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《稀有金属材料与工程》2020年第12期4303-4310,共8页Rare Metal Materials and Engineering

基　　金：山西省自然科学基金(201801D221140,201801D121099);山西省人才专项(优秀人才科技创新)(201705D2011007);山西省科学仪器设备共享服务平台项目(201805D141005)。

摘　　要：通过将水热碳化法和阳极氧化法相结合制备了具有良好电化学性能的无定形碳包覆的混晶型TiO2纳米管阵列(C@TNTs)。利用扫描电镜(SEM)、拉曼光谱(Raman)、X射线衍射(XRD)、透射电镜(TEM)和X射线光电子能谱(XPS)及电化学测试等表征方法对未修饰的TNTs试样和在550、650和750℃退火温度下得到的无定形碳修饰的C@TNTs分别进行了表征。结果表明:水热碳化法可以将厚度为3.4~6.8 nm无定形碳层均匀地包覆在TiO2纳米管阵列上,却不会影响其形貌和结构;其中C@TNTs-550、C@TNTs-650和C@TNTs-750在电流密度为0.1 mA·cm^-2时的放电比电容分别为2.83、6.52和1.48 mF·cm^-2,相较于未修饰前的TNTs分别提升了约27、64和14倍;此外,在TiO2纳米管阵列中引入一定量的金红石相有利于其电化学性能的提升。An amorphous carbon-coated mixed-crystal TiO2 nanotube array(C@TNTs)with good electrochemical performance was prepared by combining the hydrothermal carbonization method and anodizing method.Scanning electron microscopy(SEM),Raman spectroscopy(Raman),X-ray diffraction(XRD),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),and electrochemical methods were used to characterize and analyze the unmodified TNTs sample and the C@TNTs samples obtained at annealing temperatures of 550,650 and 750℃.The results show that the amorphous carbon layer with the thickness of 3.4~6.8 nm can be coated uniformly on the TiO2 nanotube arrays by the hydrothermal carbonization method,but the method does not affect the morphology and structure.The discharge capacitance of C@TNTs-550,C@TNTs-650 and C@TNTs-750 are 2.83,6.52 and 1.48 mF·cm^-2 at current density of 0.1 mA·cm^-2,which are 27,64 and 14 times higher than that of the unmodified TNTs,respectively.What’s more,the introduction of a certain amount of rutile phase in TiO2 nanotube arrays is conducive to the improvement in electrochemical performance.

关 键 词：水热碳化 阳极氧化法 无定形碳 TIO2纳米管阵列 电化学性能 

分 类 号：TB383[一般工业技术—材料科学与工程]