PHOTOCHEMICAL REACTION CONTROLLED BY PHOTOCHEMICAL DIODE AND ITS APPLICATION TO FIXATION OF CARBON DIOXIDE

光化学二极管控制的光化学反应及其在二氧化碳固定中的应用

• 批准号: 09650915
• 负责人: IZUMI Ikuichiro
• 金额: $ 2.11万
• 依托单位: NARA NATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650915/
• 关键词: Photochemical diode; Light energy conversion; CO_2fixation; Photocatalysis; Graphite intercalation compound

The results of this research are summarized as follows.(1) The product-separable photochemical diode composed of n-TiO_2 /Ti was manifested as photoactive wafers. A Xe-lamp illumination on a n-TiO_2 surface of photochemical diode in an aqueous solution of KHCO_8 induced the production of hydrogen and oxygen en Ti metal and n-Ti0_2 semiconductor, respectively, while by a deposition of Cu onto Ti metal hydrocarbons such as methane and ethylene were produced in addition to carbon monoxide on Cu metal.(2) We found the selective reduction of CO_2 using the photochemical diode of the system n-TiO_2/Ti/Cu-Ag with various atomic ratios of Cu to Ag on the surface of Ti. By electrodeposition of a small amount of Ag onto Ti/Cu surface, ethylene was a predominant reduction product from CO_2 rather than methane.(3) We also found that graphite intercalation compounds with copper and iron chlorides, were sensitized by light illumination of a Xe-lamp, generrating photocurrent and photovoltage.

主要研究结果如下：(1)n-TiO_2/Ti组成的产物可分离的光化学二极管表现为光活性晶片。在KHCO8水溶液中，Xe灯照射在光化学二极管的n-TiO_2表面，分别诱导钛金属和n-TiO_2半导体中的氢和氧的生成，而通过在钛金属上沉积铜，除了在铜金属上生成一氧化碳外，还生成甲烷和乙烯等碳氢化合物。(2)我们发现在钛表面具有不同铜和银原子比的n-TiO_2/钛/铜-银体系的光化学二极管可以选择性地还原CO_2。通过在Ti/Cu表面电沉积少量的银，乙烯是CO_2的主要还原产物，而不是甲烷。(3)我们还发现，石墨与氯化铜和氯化铁的插层化合物在氙灯的照射下被敏化，产生光电流和光电压。

项目成果

N.Iwashita, I.Izumi, Y.Hamada and Y.Ohnishi: ""Photosensitization of Graphite Intercalation Compounds with Metal Chlorides"" CARBON. 36. 1700-1703 (1998)

N.Iwashita、I.Izumi、Y.Hamada 和 Y.Ohnishi：“石墨插层化合物与金属氯化物的光敏化”碳。

Yasuyuki OHNISHI: "Selective CO_2 Reduction using the Photochemical Diode of the System n-TiO_2/Ti/Cu-Ag" DENKI KAGAKU(現在、Electrochemistry). Vol.66. 590-593 (1998)

Yasuyuki OHNISHI：“使用 n-TiO_2/Ti/Cu-Ag 系统的光化学二极管进行选择性 CO_2 还原”DENKI KAGAKU（目前为电化学）第 66 卷（1998 年）。

I.Izumi: ""Light Energy Conversion and Chemical Reduction on Photochemical Diode" in Japanese" KYOEI. No.106. 19-25 (1998)

I.Izumi：“日语中的“光化学二极管的光能转换和化学还原””KYOEI。

Y.Hamada, I.Izumi, Y.Ohnishi and N.Iwashita: "Photoelectrochemical Behavior of Graphite Intercalation Compounds with Metal Chlorides"" DENKI KAGAKU (presently Electrochemistry). 66. 1320-1322 (1998)

Y.Hamada、I.Izumi、Y.Ohnishi 和 N.Iwashita：“石墨插层化合物与金属氯化物的光电化学行为”” DENKI KAGAKU（现为电化学）。66. 1320-1322 (1998)

Y.Ohnishi, I.Izumi and K.Morimoto: ""Selective CO_2 Reduction Using the Photochemical Diode of the System n-TiO_2/Ti/Cu-Ag"" DENKI KAGAKU (presently Electrochemistry). 66. 590-593 (1998)

Y.Ohnishi、I.Izumi 和 K.Morimoto：“使用 n-TiO_2/Ti/Cu-Ag 系统的光化学二极管进行选择性 CO_2 还原””DENKI KAGAKU（现为电化学）。