A facility synthesis of bismuth-iron bimetal MOF composite silver vanadate applied to visible light photocatalysis

The metal-organic framework (MOF)-based photocatalytic technology has received widespread attention due to its excellent properties (such as adjustable aperture structure and unique optical response). A facile sheet-like sliver vanadate/Bi–Fe MOF (AGV/HBF) heterojunction composite is successfully synthesized by introducing in situ precipitation AgVO3/Ag4V2O7 (AGV) nano-particles on the interface of Bi–Fe MOF. Herein, HBF is used as a template, and the morphology of the layer cake provides a suitable environment for the growth of nano-silver vanadate particles. The composite photocatalyst is characterized using XRD, FTIR, SEM, EDS, and XPS. HBF and AGV/0.25HBF worked well in the photocatalytic decomposition of rhodamine B (RhB) under visible light. The degradation efficiency reached 77.1% and 99.4% under visible light irradiation for 2 h, separately. The enhanced photocatalytic performance of the AGV/0.25HBF nanocomposite can be attributed to the strong visible-light absorption, unique nanostructures, and low recombination of electron-hole pairs due to the as-formed heterojunctions. In addition, the stability and photoelectric properties of HBF and AGV/0.25HBF are also discussed. Hope these studies can assist with the research and wide application of MOF-based photocatalysts.