Monomolecular VB2-doped MOFs for photocatalytic oxidation with enhanced stability, recyclability and selectivity
Monomolecular VB2 is doped into UiO-66 via chemical bond and the obtained VB2@UiO-66 can be used as heterogeneous photocatalyst. The introduction of VB2 has modulated the band structure of UiO-66, resulting in 1O2 as the only reactive oxygen species under visible light irradiation, which is totally different from sole VB2 with various reactive species. It is the reason why VB2@UiO-66 displays excellent photocatalytic selectivity towards benzyl alcohol oxidation. At the same time, chemical bonding with UiO-66 greatly improves the stability of VB2 under visible light. This work offers not only a solution to the poor recyclability, stability and selectivity of VB2 as photocatalyst but also a new efficient strategy to extend photocatalytic application of MOFs by immobilizing usual biological antioxidant on their particular sites.