Abstract

In order to improve sunlight-energy utilization efficiency of the photocatalyst for the degradation of organic pollutants in wastewater, a novel photoreactor that comprised H3PW12O40/TiO2 or metallic Ag deposited H3PW12O40/TiO2 film-coated optical fiber bundles was designed by the steps of sol–gel, hydrothermal treatment, photoreduction, and dip coating. The H3PW12O40/TiO2 or Ag/H3PW12O40/TiO2 film exhibited anatase phase, mesoporosity, and charge transfer band in the range of 200−400nm or 200−800nm. The photocatalytic activity of the H3PW12O40/TiO2 and Ag/H3PW12O40/TiO2 film-coated optical fibers was evaluated by the degradation of rhodamine B and 4-nitrophenol in aqueous solutions under the irradiation of commercial Xe lamp and self-made solar simulator (320nm<λ<680nm). The enhanced photocatalytic activity of the H3PW12O40/TiO2 or Ag/H3PW12O40/TiO2 film in comparison of TiO2 film was obtained and explained in terms of the synergistic photocatalytic effect between Keggin unit and TiO2 as well as surface plasmon resonance effect of metallic Ag; and considerably high photocatalytic activity of the H3PW12O40/TiO2 and Ag/H3PW12O40/TiO2 film in the optical fiber photoreactor is explained by the superior light-energy utilization of the catalyst in the optical-fiber reactor. Finally, the reusability of the catalyst film was evaluated through six consecutive catalytic runs.

Full Text
Paper version not known

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

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.