Abstract
Abstract The metal ion-implantation with V ions was effective to shift the absorption band of Ti- containing mesoporous molecular sieves (V/Ti-HMS, V/Ti-MCM-41 ) to the longer wavelengths. V/Ti-HMS and V/Ti-MCM-41 performed the photoepoxidation of propene with molecular oxygen under UV irradiation with the longer wavelength (λ> 340 nm), while no reaction proceeded on the original Ti-HMS. Cr-containing mesoporous molecular sieves (Cr- HMS) could absorb visible light and showed the photoepoxidation under visible light irradiation ( λ> 450 nm). The charge transfer excited state of the tetrahedral chromium oxide moieties dispersed on mesoporous silica played a significant role in the photocatalytic reaction.
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