摘要
Ordered crystalline mesoporous anatase titanium dioxides with different amounts of rutile were prepared by hard-template approaches using mesoporous silica(KIT-6)as the template. The resulting mesoporous materials were characterized by powder X-ray diffraction(PXRD), transmission electron microscope(TEM), N_2 adsorption and Raman spectroscopy. All mesoporous TiO_2 has three-dimensional(3 D) ordered mesostructures with large Brunauer–Emmett–Teller(BET) surface area and narrow pore size distribution(ca. 5 nm). It was found that the level of rutile phase in the mesoporous titanium oxide was related to the SO4_2-concentration in the starting materials. Their photocatalytic hydrogen production was evaluated and compared. It is found that low rutile content is beneficial for a high catalytic activity. All samples demonstrate a better activity than commercial P25.
Ordered crystalline mesoporous anatase titanium dioxides with different amounts of rutile were prepared by hard-template approaches using mesoporous silica(KIT-6)as the template. The resulting mesoporous materials were characterized by powder X-ray diffraction(PXRD), transmission electron microscope(TEM), N_2 adsorption and Raman spectroscopy. All mesoporous TiO_2 has three-dimensional(3 D) ordered mesostructures with large Brunauer–Emmett–Teller(BET) surface area and narrow pore size distribution(ca. 5 nm). It was found that the level of rutile phase in the mesoporous titanium oxide was related to the SO4_2-concentration in the starting materials. Their photocatalytic hydrogen production was evaluated and compared. It is found that low rutile content is beneficial for a high catalytic activity. All samples demonstrate a better activity than commercial P25.
引文
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