Open AccessCharacterization and photocatalytic reduction of CO 2 with H 2 O on Ti/FSM‐16 synthesized by various preparation methods
Author(s) -
Ikeue Keita,
Mukai Hiroaki,
Yamashita Hiromi,
Inagaki Shinji,
Matsuoka Masaya,
Anpo Masakazu
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500013674
Subject(s) - photocatalysis , x ray absorption fine structure , photoluminescence , reactivity (psychology) , oxide , materials science , selectivity , methanol , titanium oxide , absorption (acoustics) , photochemistry , dispersion (optics) , catalysis , inorganic chemistry , nuclear chemistry , chemistry , organic chemistry , spectroscopy , medicine , physics , alternative medicine , optoelectronics , pathology , quantum mechanics , optics , metallurgy , composite material
Ti/FSM-16 photocatalysts were prepared by various methods and their reactivity for the photocatalytic reduction of CO2 with H2O at 323 K was investigated. UV irradiation of Ti/FSM-16 in the presence of CO2 and H2O led to the formation of CH4 and CH3OH. The photocatalytic reactivity and selectivity differed remarkably by variations in the preparation method. Analyses of the UV-Vis absorption and XAFS spectra showed that the dispersion and local structure of the Ti-oxide species greatly depended on the preparation method. The formation of CH3OH was found to be related to the local structure of the Ti-oxide species while the yield of the photoluminescence was attributed to the charge transfer excited state of the highly dispersed tetrahedrally coordinated Ti-oxide species. Methanol formation was found to be more efficient on Ti/FSM-16 having such highly dispersed tetrahedrally coordinated Ti-oxide species.