著者

森川 健志 佐藤 俊介 荒井 健男 関澤 佳太 鈴木 登美子

出版者

公益社団法人 日本表面科学会

雑誌

表面科学 (ISSN:03885321)

巻号頁・発行日

vol.38, no.6, pp.286-290, 2017-06-10 (Released:2017-06-20)

参考文献数

12

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Developing a system for the production of organic chemicals via carbon dioxide (CO2) reduction is an important area of research that has the potential to address global warming and fossil fuel consumption. The present study demonstrates artificial photosynthesis for the direct production of organic substances under sunlight using a hybrid photocatalyst composed of a semiconductor and a metal complex catalyst. A solar to chemical energy conversion efficiency of 4.6%, calculated from the change in Gibbs free energy per mole of formic acid formation from CO2 and water (H2O), was demonstrated for CO2 photoreduction utilizing H2O as an electron donor under simulated solar light irradiation to a monolithic tablet-shaped device. These results which store solar photon energy in CO2 molecules could show promise for future progress in this field.

著者

荒井 健男 咲間 修平 佐藤 義倫 篠田 弘造 JEYADEVAN Balachandran 田路 和幸

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.119, no.12, pp.713-720, 2003-12-25

被引用文献数

1 2

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Stratified materials are defined as materials with nano-sized stratification that have been artificially controlled and designed. They are exemplified as a thin layer or stacked layers formed on surface of semiconductors. The present research is aiming at formation of controlled and designed stratification on surface of fine particles, leading to improvement of properties of fine particles which has been difficult to accomplish through the conventional particles engineering, and to development of novel properties created by the stratification.<BR>Here, we describe the method of the development of the nano-size CdS catalyst with stratified structure that efficiently separates electron and hole during photolysis, especially, to produce hydrogen gas from hydrogen sulfide, H₂S. Furthermore, as an approach for the development of the practical use photocatalyst, ZnS-carbon nanotube complex was also made and examined. In a way, the stratified structure is considered to enable the production of a reaction system which simulates function in biological cells. Using this catalyst in the solution mixed with various materials such as, calcium hydroxide, seawater and H₂S, we succeeded in producing about 7.5l/h m² of hydrogen gas under the sunlight.