摘要
采用阳极氧化法制备TiO2纳米管阵列，然后在1mol／L氨水中浸泡24h，氨气氛围下450℃煅烧合成N掺杂的TiO2纳米管阵列。通过扫描电镜（SEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）等表征方法对样品表面形貌、晶型和N元素掺杂方式进行分析。在模拟太阳光条件下，以该材料为电极，光电催化降解六氯苯（HCB）农药废水。结果表明：阳极偏压为1V、电解质为0．2mol/L Na2SO4、pH为5．0时，降解效果最好，达到95％。
N-doped Titanium dioxide （TiO2） nanotube arrays were formed by electrochemical anodization, and then impregnated in 1 mol/L ammonia for 24 h before annealed at 450℃ to synthesize N doped TiO2 arrays. The samples were characterized by scanning electron microscope （SEM）, X-ray Diffraction （XRD） and X-ray photoelectron spectroscopy （XPS） to analyse its surface morphology, crystal types and the doping behavior of nitrogen. The material was used as electrode for photoelectrocatalytic degradation of hexachlorobenzen （HCB） under irradiation of simulated sunlight. The results showed that the degradation effect reached the optimality whose rate was 95% when bias potential was IV, the concentration of Na2SO4 was 0.2 mol/L, and pH was 5.0.
