Bi3.64Mo0.36O6.55 nanoparticles anchored in BiOI: A p-n heterojunction photocatalyst to enhance water purification

Selective constructing of heterojunctions enables directional electron-hole migration and favorable charge separation. In this study, a novel p-n junction Bi3.64Mo0.36O6.55 (BMO) nanoparticles anchored in BiOI construct by hydrothermal and subsequent in-situ synthesis. The construction of tight heterojunctions that enhance the characteristic absorption of visible light by Bi3.64Mo0.36O6.55/BiOI (BIMO) and expose more reactive sites can be used to facilitate the rapid degradation of antibiotics (Tetracycline, TC), endocrine disruptors (Bisphenol A, BPA) and dyes in water. In addition, the BIMO catalyst maintained the rapid degradation rate of TC despite the interference of inorganic anions and aqueous substrates. The charge transfer pathways and radical species be-tween the heterojunction components were investigated. In addition, the intermediates and toxicological analysis showed that TC was further mineralized and the small molecule products were generated significantly less toxic and less contaminated. In conclusion, this study synthesized photocatalysts based on p-n heterojunctions, which have potential applications for the degradation of TC.

Automated summary

Selective construction of heterojunctions enhances charge separation and facilitates the degradation of antibiotics, endocrine disruptors, and dyes. A novel p-n junction Bi3.64Mo0.36O6.55 (BMO) nanoparticles anchored in BiOI were synthesized to enhance visible light absorption and expose more reactive sites. The BIMO catalyst demonstrated a rapid degradation rate of antibiotics despite interference, and the intermediates and toxicity analysis showed reduced toxicity and contamination.