Abstract
Multi-heterojunction composites exhibit unparalleled superiority in light absorption and spatial separation of charges, but their synthesis remains a challenge. Herein, we report the one-step hydrothermal synthesis of Bi-modified bismuth oxyiodide composites by modulating the pH of the reaction system using ascorbic acid (AA) as reducing agent. The pH highly influences the composition, morphology and properties of the samples. AA can reduce Bi3+ to metallic Bi, inhibit grain growth of BiOI and help to form Bi4O5I2, thus realizing the one-step synthesis of ternary composites. The sample obtained at pH 6.5 and AA of 0.24 g is the BiOI/Bi/Bi4O5I2 composites with flower-like hierarchical structure, which has the highest degradation efficiency for bisphenol A and RhB. In addition, formation mechanism of the composites was systematically researched based on the composition of intermediates, and an indirect Z-scheme photocatalytic mechanism of BBI-AA-0.24 based on the electronic bridge of metal Bi was proposed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
