In Situ Investigation of the Photocatalytic Decomposition of NO on the Ti−HMS under Flow and Closed Reaction Systems

摘要: Mesoporous materials such as Ti−HMS, prepared at ambient temperature, were studied both under continuous flow and closed reaction systems for the photocatalytic decomposition of NO. The results indicate Ti−HMS to be a good photocatalyst with reactivity prolonged irradiation. direct NO into N2, O2, N2O 275 K high selectivity N2 O2 in system is noteworthy. In situ photoluminescence EXAFS investigations show that Ti exists tetrahedral coordination highly dispersed within mesoporous material. TPD studies, before after investigations, clearly molecules cannot adsorb strongly on surface photocatalysts, contrast powdered TiO2 where strong adsorption species have been observed. It likely charge transfer excited state tetrahedrally coordinated titanium oxide plays significant role decomposi...