Bimetal-organic frameworks derived carbon doped ZnO/Co3O4 heterojunction as visible-light stabilized photocatalysts

摘要: Abstract The construction of transition-metal oxygen heterojunction photocatalysts has been paid close attention for application versatile functionalities. Many methods have developed and applied to improve photocatalytic performance, such as doping morphology control. In this study, carbon (C)-doped binary oxide heteronanostructures with hollow dodecahedra are fabricated by means topotactic transformation metal-organic frameworks. converted C ZnO/Co3O4 nanocomposite large specific area advantage in charge transfer charge-separation efficiency, then is evaluated degrading methylene blue (MB) under visible light irradiation (λ > 400 nm). experiment demonstrates the optimal catalytic performance about 8.4-fold k values pure ZnO. Importantly, in-situ synthesized composites show noteworthy stability recyclability, even after five runs. A possible mechanism also mentioned, results illustrate that synergistic effect coupled semiconductor system dramatically suppresses recombination photogenerated electron-hole pairs, hydroxyl radicals (•OH) holes play a critical role. This work exhibits an effective method design other nonmetal sound heterojunctions well-controlled significantly enhance behavior.