敏化TiO_2多孔薄膜电极的制备及其光电化学研究  

Preparatrion and photoelectrochemical studies of sensitized TiO_2 nanoporous electrode

作　　者：姜黎明[1] 

机构地区：[1]哈尔滨商业大学食品工程学院,哈尔滨150076

出　　处：《哈尔滨商业大学学报（自然科学版）》2010年第2期210-213,253,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：以β环糊精(β-CD)为添加剂,通过改变β-CD的添加量,水热法制备多孔二氧化钛粒子,用XRD、N2adsorption-sorption等方法对其进行了表征.同时,利用这些颗粒制备出不同微观结构的纳米TiO2多孔薄膜,并利用电化学阻抗谱、光电流工作谱研究其敏化纳米TiO2多孔薄膜电极的光电化学行为.结果表明:随β-CD的加入量逐渐增加,电极的阻抗弧半径和TiO2/电解质溶液界面的转移电阻Rct数值逐渐变小、电容CPE数值及光电流IPh逐渐增大,当β-CD/TiO2=40%时,上述几个参数均为最佳值.The different porous titania powders are prepared under hydrothermal conditions by employing various amount β-cyclodextrin（CD） as the additive,and characterized by means of XRD,N2 adsorption-sorption.To obtain different microsructure nanoporous TiO2 membrane,the above titania powders are employed.The photoelectrochemical properties of sensitized nanoporous TiO2 electrodes are studied with electrochemical impedence spectra（EIS） and photocurrent action spectra.The results indicate that the impedence arc-radius and the resistance for charge transfer across the TiO2/electrolyte interface and in between TiO2 film Rct values gradually decrease,but the capacitance CPE and photocurrent IPh gradually increase;meanwhile,the porous membrane electrodes with β-CD/TiO2 =40% showed the above parameters are best.

关 键 词：TiO2纳米多孔膜电极 光敏化 光电化学 光电流 电化学阻抗谱 

分 类 号：O646[理学—物理化学]