Construction of efficient solar-light-driven quaternary Ag3VO4/Zn3(VO4)2/Zn2V2O7/ ZnO heterostructures for removing organic pollutants via phase transformation and in-situ precipitation route

摘要: Abstract High efficient solar-light-driven heterogeneous photocatalysts are crucial for utilizing solar energy to deal with environmental problem. Herein, a novel Ag3VO4/Zn3(VO4)2/ Zn2V2O7/ZnO quaternary heterojunction (Ag3VO4/Zn-V-O) was constructed by phase transformation and in-situ precipitation process. This photocatalyst applied efficiently remove some typical organic pollutants, e.g. phenols (bisphenol A, p-chlorophenol, phenol) azo dyes (rhodamine B, methyl orange, acid orange II methylene blue). The well matched level structure among Ag3VO4, Zn3(VO4)2 Zn2V2O7 semiconductors greatly strengthened the light harvesting suppressed recombination of photoinduced electron-hole pairs in Ag3VO4/Zn -V-O heterojunction, producing more OH O2− radicals participate decomposing pollutants. Under simulate illumination, Ag3VO4 Zn-V-O almost show no activity decomposition, however, 86%, 70% 80% degradation rates were obtained over 50%Ag3VO4/Zn bisphenol phenol p-chlorophenol. Similar very high observed (95% RhB, 50% MO, 78% 100% MB). work could afford interesting insight into designing advanced photocatlysts applying purification.