| 无定形纳米Fe2O3微粒的光电化学特性 |
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| 引用本文： | 钱新明,吕红辉,张昕彤,李英顺,白玉白,李铁津,汤心颐.无定形纳米Fe2O3微粒的光电化学特性[J].吉林大学学报(理学版),1999(2):87-92. |
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| 作者姓名： | 钱新明 吕红辉 张昕彤 李英顺 白玉白 李铁津 汤心颐 |
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| 作者单位： | 1. 吉林大学化学系,长春,130023
2. 吉林工业大学化学系 |
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| 摘 要： | 用强迫水解的方法制备粒径为5 nm的无定形Fe2O3微粒, 并用滴膜的方法制备ITO/Fe2O3电极. 在KCl, Na2SO4, NaOH电解质溶液中研究这种电极的光电化学特性. 同时对光生载流子在Fe2O3膜/电解质溶液界面的传递过程进行讨论. 根据紫外-可见吸收特性及光电流的产生电位实验数据绘制了无定形Fe2O3的能级示意图.
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| 关 键 词： | 纳米微粒 无定形Fe2O3 光电化学 |
| 修稿时间： | : 1998-08-24 |
Studies on the Photoelectrochemisy of Amorphous Fe2O3 Particulate Films |
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| Qian Xinming,Lü Honghui,Zhang Xintong,Li Yingshun,Bai Yubai,Li Tiejin,Tang Xinyi.Studies on the Photoelectrochemisy of Amorphous Fe2O3 Particulate Films[J].Journal of Jilin University: Sci Ed,1999(2):87-92. |
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| Authors: | Qian Xinming Lü Honghui Zhang Xintong Li Yingshun Bai Yubai Li Tiejin Tang Xinyi |
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| Institution: | Qian Xinming, Lü Honghui,
Zhang Xintong, Li Yingshun,
Bai Yubai, Li Tiejin, Tang Xinyi
(Department of Chemistry, Jilin University, Changchun, 130023) |
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| Abstract: | Amorphous Fe 2O 3 colloid was prepared by the forced hydrolysis method and its films were fabricated on ITO electrodes by dropping technique. The photoelectrochemical properies of ITO/Fe 2O 3 electrodes were investigated in 0.5 mol/L KCl, 1 mol/L Na 2SO 4 and 1 mol/L NaOH solutions, in which the anodic current onset potentials were 0.75 V, 0.75 V and 0.6 V respectively. The band gap of amorphous Fe 2O 3 was 2.18 eV obtained from the UV vis absorption spectrum. In the amorphous Fe 2O 3 particulate films/electrolyte system, the photo induced holes transfered to the electrolyte and oxidized a species in the solution, while the excited electrons moved in the direction toward the ITO electrode, which caused the anodic current. On the other hand, some photo induced electrons also transfered to the electrolyte to cause cathodic current in the direction of voltage reverse scan. |
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| Keywords: | nanometer particles amorphous Fe 2O 3 photoelectrochemistry |
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