摘要
室温下在NH4F、乙二醇的混合溶液中采用阳极氧化法在纯Ti片表面得到一层结构高度有序、分布均匀、垂直取向TiO2纳米管阵列,通过调整阳极氧化工艺条件可实现对其结构参数(如管径、管壁厚度、管长等)的有效控制;对TiO2纳米管阵列进行扫描电子显微镜(SEM)、X-射线衍射(XRD)检测;测试了TiO2纳米管降解甲基橙的光催化性能。结果表明:在优化条件下制备得到了高密度排列的TiO2纳米管阵列;在500 W高压汞灯照射40 min后,初始摩尔浓度为20 mg·L-1的甲基橙在pH=2.0时,降解率达到99.4%,溶液中加入H2O2可以提高TiO2纳米管光降解催化活性。
The highly ordered and uniform TiO2 nanotube arrays were fabricated by anodic oxidation of titanium foil in ethylene glycol solution containing NH4 F.The diameter,density,length and wall thickness of the prepared nanotube arrays can be controlled effectively by varying the anodization parameters.The microstructures and morphologies of the fabricated TiO2 nanotube were characterized by scanning electron microscope（SEM） and X-ray diffraction（XRD）,and its photocatalytic properties were investigated via the degradation of methyl orange.The results show that the highly ordered and uniform TiO2 nanotube arrays could be grown under the conditions optimized by authors.Using the prepared TiO2 nanotube arrays as photocatalyst and after 40 min illumination of the high voltage mercury lamp（500 W）,the degradation ratio of methyl orange in its aqueous solution with concentratin of 20 mg·L-1 can reach 99.4% when the solution pH value is 2.0.And it was found that the photocatalysis of TiO2 nanotube can be improved by adding H2O2 into the solution.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2011年第3期507-512,共6页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(20863008)
广西大学科研基金(090005)
中国科学院半导体研究所半导体材料科学重点实验室开放基金(KLSMS-0905)
