Evaluating the Effect of Radiation Damage on the Photocatalytic Performance of H2+-implanted Hematite Electrodes

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• 作者：Kun Qin ; Chien-Hsu Chen ; Jianrong Li ; Yi-Kong Hsieh ; TsingHai Wang and Chu-Fang Wang
• 刊名：Journal of the Chinese Chemical Society
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：63
• 期：8
• 页码：725-733
• 全文大小：1256K
• ISSN：2192-6549

文摘

The content of oxygen vacancy in hematite is known to play an important role in photocurrent enhancement. We found that implanting high energy H₂⁺ to hematite photoelectrodes indeed injected additional oxygen vacancy and thus the conductivity of hematite was increased. However, inevitable radiation damage on the other hand distorted hematite lattice structure. Although post annealing will relax the lattice distortion to a certain degree, most implanted and post annealed hematite photoelectrodes exhibited deteriorated photocatalytic activities than the one without implantation. It seems that structure engineering is more effective in photocurrent enhancement than the injection of additional oxygen vacancy.