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电化学表面处理和Ti掺杂制备高光电化学性能的Fe_2O_3光阳极(英文) 被引量:1

Synthesis of Fe_2O_3 photoanode with improved photoelectrochemical performance by surface electrochemical pretreatment and Ti-doping
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摘要 通过金属有机物分解的方法合成了Ti掺杂Fe_2O_3光阳极.通过XRD、紫外—可见吸收光谱、X射线光电子能谱(XPS)、扫描电镜(SEM)对Fe_2O_3光阳极进行表征,并对Fe_2O_3光阳极进行了光电化学表征.为了提高Ti掺杂Fe_2O_3光阳极的光电性能,对Ti掺杂Fe_2O_3光阳极的Ti掺杂浓度进行了优化.光电化学测试结果表明电化学表面处理能够提高Ti掺杂Fe_2O_3光阳极的光电化学性能.说明Ti掺杂和电化学表面处理可以增加Fe_2O_3光阳极光电流.基于Mott-Schottky曲线和电化学阻抗谱(EIS)分析了Fe_2O_3光阳极光电流增加的机理. Ti-doped Fe 2 O 3 photoanode was obtained through metal-organic decomposition method.The physical and photophysical properties of the hematite photoanode were investigated by X-ray diffraction(XRD),UV-vis absorption spectroscopy,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM)and the photo-electrochemical performance was evaluated for the Ti-doped Fe 2 O 3 photoanode.In terms of maximizing the photoelectrochemical performances of the Ti-doped Fe 2 O 3 photoanodes,the doping concentration of titanium was optimized.The Ti-doped Fe 2 O 3 photoanode exhibits improved photoelectrochemical performance after the electrochemical surface pretreatment.The photoelctrochemical response of hematite photoanode can be improved by both titanium doping and the electrochemical surface pretreatment.Based on the analysis of the Mott-Schottky plots and electrochemical impedance spectra(EIS),a possible mechanism was proposed to explain the reason for the enhancement of photocurrent.
作者 万丽娟 张丽 杨明 WAN Li-Juan;ZHANG Li;YANG Ming(Nanjing Vocational Institute of Transport Technology,Nanjing 211188,China;Jiangsu Engineering Technology Research Center for Energy Conservation and Emission Reduction of Transportation, Nanjing 211188,China;School of Transportation,Southeast University,Nanjing 210096,China)
出处 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2018年第5期1083-1090,共8页 Journal of Sichuan University(Natural Science Edition)
基金 南京交通职业技术学院科研基金(JZ1704) 南京交通职业技术学院高层次人才科研启动经费 江苏省高校自然科学研究面上项目(16KJD610004) 国家自然科学基金(51208102)
关键词 氧化铁 Ti掺杂 光阳极 Hematite Ti-doped Photoanode
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