硫掺杂TiO₂/Ti光电极制备及其可见光光电催化性能

孙海健^1,2, 金玉苹³, 王斌⁴, 刘惠玲¹, 齐虹¹, 韩蕾¹

1.哈尔滨工业大学市政环境工程学院;2.牡丹江市规划局;3.牡丹江师范学院;4.哈尔滨工业大学建筑学院



摘要:

为了提高TiO2/Ti光电极在可见光下的光电催化活性,采用阳极氧化法制备了一种新型的硫掺杂TiO2/Ti光电极.采用扫描电子显微镜、X射线衍射、X射线荧光光谱等技术对光电极进行了表面形貌、结晶形态、晶粒尺寸、硫的掺杂量和价态以及吸光性能表征.研究表明:硫掺杂TiO2/Ti光电极的最佳制备条件为:成膜电压160V、电流密度100mA/cm2、Na2SO3质量浓度750mg/L;所制备的光电极具有良好的光电催化氧化降解邻苯二甲酸二甲酯活性,并能有效地矿化其中间产物;与TiO2/Ti电极相比,硫的掺杂可以显著提高其在可见光下的光电催化性能.

关键词:  硫掺杂TiO2/Ti光电极  阳极氧化法  可见光  光电催化  邻苯二甲酸二甲酯(DMP)

DOI：10.11951/j.issn.1005-0299.20100501

分类号:X703.1

基金项目:国家自然科学基金资助项目(50678044)



Preparation of sulfur-doped TiO₂/Ti photoelectrodes and photoelectrocatalysis under visible light

SUN Hai-jian^1,2, JIN Yu-ping³, WANG Bin⁴, LIU Hui-ling¹, QI Hong¹, HAN Lei¹

1.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;2.Mudanjiang Planning Bureau,Mudanjiang 157000,China;3.Mudanjiang Normal University,Mudanjiang 157000,China;4.School of Architecture,Harbin Institute of Technology,Harbin 150090,China

Abstract:

To improve the photoelectrocatalytic activity of TiO2/Ti photoelectrode under visible light,a novel sulfur-doped TiO2/Ti photoelectrode was prepared by anodization.The surface morphology,crystal,particle size,amount of sulfur,valence state of sulfur and optical characteristics of sulfur-doped TiO2/Ti photoelectrode were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),X-ray fluorescence(XRF),X-ray photoelectron spectroscopy(XPS),and UV/VIS diffuse reflection spectra.Results indicate that sulfur-doped TiO2 /Ti photoelectrode shows a good photoelectrocatalytic activity on the removal and mineralization of dimethyl phthalate(DMP) under visible light irradiation when the prepared conditions are voltage of 160 V,current density of 100 mA/cm2 and sulfur concentration of 750 mg/L.The doped sulfur can significantly improve the photoelectrocatalytic activity of TiO2 /Ti photoelectrode under visible light.

Key words:  sulfur-doped TiO2/Ti photoelectrode  anodization  visible light  photoelectrocatalytic(PEC) degradation  dimethyl phthalate(DMP)