Abstract
A series of Z-scheme heterojunction g-C3N4/Bi5O7I composites were fabricated via a facile electrostatic self-assembly procedure. The optimum 15%-g-C3N4/Bi5O7I displayed good degradation efficiency toward tetracycline (TC) under visible light irradiation. The improvement of photocatalytic efficiency was mainly attributed to the generation of photo-induced h+ and O2•− radical. The migration route of photo-induced h+ and e− between g-C3N4 and Bi5O7I was investigated by XPS analysis, EPR test, photocatalytic mechanism and DFT calculations. The degradation pathways and the toxicological simulation of TC were evaluated. It was revealed that the intermediates produced during degradation process exhibited lower toxicity than the pristine TC. In addition, 15%-g-C3N4/Bi5O7I exhibited good stability and reusability. Considering its potentials in practical application, 15%-g-C3N4/Bi5O7I displayed high photocatalytic efficiency under natural sunlight irradiation. In all, this work offered a deep insight into the photocatalytic mechanism of tetracycline degradation over bismuth-rich bismuth oxyhalide/g-C3N4 heterojunction photocatalysts.
Sign-in/Register to access full text options 
Free) 
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 call
