Effect of Electric Field on CO₂ Photoreduction by TiO₂ Film

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• 作者：Zhengfeng Huang ; Xudong Cheng ; Peimei Dong ; Xiwen Zhang
• 关键词：TiO2 ; electric field ; humidity ; CO2 photoreduction
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：46
• 期：2
• 页码：999-1004
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

To mitigate the greenhouse effect, many studies have been carried out to improve the CO₂ conversion efficiency of TiO₂. Modification of TiO₂ has been intensively investigated, but the influence of an electric field on photoreduction by this material remains largely unknown. Accordingly, in this study, we explored the effect of an electric field on the photoreduction process using a porous TiO₂-Ti material. The results indicated that the CO yield improved 85-fold (equivalent to 4772 μmol/g h) when a 30-kV voltage was applied during the reduction process. To make the electric field effect fully functional, we also explored the effect of water on the photoreduction process, finding that TiO₂ showed the highest conversion rate when the humidity was controlled at 50% relative humidity (RH).