Abstract
A novel visible-light-sensitive BiOI/BiVO4 photocatalyst with a pn heterojunction structure was synthesized through a facile coprecipitation method. The physical and chemical properties of as-synthesized BiOI/BiVO4 composites were characterized by XRD, XPS, BET, SEM, EDS, HRTEM, photoluminescence spectrum and UVDRS respectively. The photocatalytic activity of the prepared photocatalysts was evaluated by photodegrading methylene blue and killing of Pseudomonas aeruginosa (P. aeruginosa) under visible light irradiation. The results showed that the 30%BiOI/BiVO4 (molar ratio of I:V=3:7) exhibits the higher photocatalytic activity than the pristine BiOI and BiVO4. Moreover, the sterilization mechanism involved in the photocatalytic disinfection process was studied by captive species trapping experiments. The result revealed that hydroxyl radical (OH) and holes (h+) are the main reactive species for killing of P. aeruginosa under visible light irradiation. In addition, after five recycles for killing of P. aeruginosa under visible light irradiation, 30%BiOI/BiVO4 does not exhibit significant loss of photocatalytic activity. The results confirm that the synthesized 30%BiOI/BiVO4 photocatalyst has long-time reusability and good photocatalytic stability. The photocatalyst shows potential application in marine antifouling.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.