| NiNb2O6半导体电极的能级结构和腐蚀机理研究 |
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| 引用本文： | 李果华,李国昌.NiNb2O6半导体电极的能级结构和腐蚀机理研究[J].影像科学与光化学,1994,12(3):207-213. |
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| 作者姓名： | 李果华 李国昌 |
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| 作者单位： | 1. 石家庄铁道学院基础部, 石家庄050043;2. 河北轻工化工学院基础部, 石家庄050018 |
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| 摘 要： | 本文通过测量伏安特性和光谱响应研究了被还原的n型NiNb2O6半导体单晶电极的光电化学性质及其能级结构,观察到两个吸收带,强者在3.24eV,对应于氧-锯跃迁;弱者在1.75eV,在可见光区,对应于镍-铌跃迁。探讨了阳极暗腐蚀、光腐蚀和水的光电解机理,绘出了NiNb2O6的电子能级图和主要的裂解能级。
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| 关 键 词： | 半导体光电化学 暗腐蚀 光腐蚀 |
| 收稿时间： | 1995-05-19 |
THE INVESTIGATION ON THE ENERGY STRUCTURES AND THE CORROSION MECHANISM OF NiNb2O6 SEMICONDUCTOR ELECTRODE |
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| LI GUO-HUA,LI GUO-CHANG.THE INVESTIGATION ON THE ENERGY STRUCTURES AND THE CORROSION MECHANISM OF NiNb2O6 SEMICONDUCTOR ELECTRODE[J].Imaging Science and Photochemistry,1994,12(3):207-213. |
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| Authors: | LI GUO-HUA LI GUO-CHANG |
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| Affiliation: | 1. Department of Fundamental Courses, Shijiazhuang Railway Institute, Shijiazhuang 050043;2. Department of Fundamental Courses, Hebei Chemical Engineering Institute, Shijiazhuang 050018 |
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| Abstract: | In this paper the Photoelectrochemical behaviour and the energy level construction of the reduced n-NiNb2O6 semiconductor single crystal electrodes were studied by measuringthe current-potential characteristics and the spectral responses.Two absorption bands were observed,the most intense at 3.24eV being due to oxygen-niobium photoexcitation,the other at 1.75eV in the visible region and being due to nickel-niobium charge transfer.The mechanism of anode dark corrosion,photrvcorrosion,and photoelectrolysis were discussedand the NiNb2O6 electron energy diagram and the major band cleavage energy levels were also given out. |
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| Keywords: | semiconductor photoelectrochemistry dark corrosion photo-corrosion |
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