摘要
采用电化学阳极氧化法在钛基体上制得了高度致密的、有序的、均匀的TiO2纳米管阵列。用SEM、XRD等对其表面形貌和结构晶型进行了表征和分析。以TiO2纳米管阵列为光催化剂对废水中典型的有机污染物——苯酚进行了光催化降解,考察了影响光催化降解速率的因素。结果表明,在紫外光照下,苯酚水溶液的pH=3、ρ(苯酚)=10.0 mg/L时,具有锐钛矿相结构的TiO2纳米管阵列的光催化效果最好,相同条件下与溶胶凝胶法制备的纳米TiO2颗粒膜的光催化降解速率进行对比,前者比后者提高了近一倍。
High-density,well-ordered and uniform titanium oxide nanotube arrays were prepared by electrochemical anodic oxidation.The morphology and crystal structure of the TiO2 nanotubes were characterized and analyzed by SEM and XRD.As a photocatalyst,TiO2 nanotube arrays were used to degrade phenol which is a typical organic pollutant in wastewater.The photocatalytic degradation under UV irradiation is most effective with anatase TiO2 nanotube arrays when pH of phenol solution is 3 and mass concentration of phenol is 10.0 mg/L. Compared with TiO2 nanoparticle coatings prepared by solgel process, the photocatalytic degradation rate of TiO2 nanotube arrays is almost doubled under the same experimental condition.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2007年第4期317-320,344,共5页
Fine Chemicals
基金
国家自然科学基金项目(50571085)
关键词
电化学阳极氧化
二氧化钛纳米管阵列
光催化性能
苯酚
electrochemical anodic oxidation
titanium oxide nanotube arrays
photocatalytic activity
phenol
