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Photocatalytic reduction of CO2 with H2O on Ti-MCM-41 and Ti-MCM-48 mesoporous zeolite catalysts |
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| Authors: | Masakazu Anpo Hiromi Yamashita Keita Ikeue Yo Fujii Shu Guo Zhang Yuichi Ichihashi Dal Ryung Park Yasuo Suzuki Keiko Koyano Takashi Tatsumi |
| Affiliation: | a Department of Applied Chemistry, Osaka Prefecture University, Gakuen-cho, Sakai Osaka 599-8531 Japan b Ion Engineering Research Institute Corporation, Hirakata Osaka 573-0128 Japan c Engineering Research Institute, School of Engineering, The University of Tokyo, 2-11-16 Yayoi Tokyo 113-8656 Japan |
| Abstract: | Titanium oxide species included within the framework of mesoporous zeolites (Ti-MCM-41 and Ti-MCM-48) prepared by a hydrothermal synthesis exhibited high and unique photocatalytic reactivity for the reduction of CO2 with H2O at 328 K to produce CH4 and CH3OH in the gas phase. In situ photoluminescence, diffuse reflectance absorption, ESR and XAFS investigations indicated that the titanium oxide species are highly dispersed within the zeolite framework and exist in tetrahedral coordination. The charge transfer excited state of the highly dispersed titanium oxide species played a significant role in the reduction of CO2 with H2O exhibiting a high selectivity for the formation of CH3OH. |
| Keywords: | Photocatalytic reduction of CO2 with H2O Ti-mesoporous zeolite Ti-MCM-48 Ti-MCM-41 Selective CH3OH formation |
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