Abstract
Water-borne virus pollution has caused great harm and attracted widespread attention in many countries. Visible-light-driven photocatalysis is considered as a promising process for disinfection. In this study, Ag3PO4/g-C3N4 (AgCN) composites were synthesized by hydrothermal method. The photocatalytic disinfection was investigated using bacteriophage f2 as the model virus. Moreover, the effects of pH and humic acid on photocatalytic disinfection were studied. Meanwhile, the mechanism of enhanced disinfection by Ag3PO4/g-C3N4 was systematically investigated by radical scavenger experiments. The results show that Ag3PO4 particles were uniformly distributed on g-C3N4 sheets. By means of photoluminescence spectrometer analysis, it is confirmed that a lower carrier recombination rate for Ag3PO4/g-C3N4 was achieved compared with Ag3PO3 and g-C3N4. Meanwhile, complete inactivation of f2 with concentration of 3 × 106 PFU/mL was reached within 80 min in the presence of Ag3PO4/g-C3N4 composite. The pH had little effect on removal efficiency overall, while the existence of humic acid resulted in a significant negative effect on the inactivation of f2 due to the optical shielding and absorption of humic acid. Recycling tests of Ag3PO4/g-C3N4 confirmed that Ag3PO4/g-C3N4 presented superior stability. The results from radical scavenger experiments indicated that holes (h+) and hydroxyl radicals (·OH) played important roles in photocatalytic disinfection process.
Highlights
C3N4 [16,20,25]. the absorption spectrum of AgCN composites has a strong photo-absorption edge around 500 nm in the visible-light region, which can be ascribed to the combination of Ag3 PO4 edge around 500 nm in the visible-light region, which can be ascribed to the combination of Ag3PO4 particles [20]
The AgCN composite exhibits a higher visible-light driven photocatalytic potential, which presents the synergistic features of g-C3 N4 and Ag3 PO4 photocatalysts
The duplication and purification process of bacteriophage f2 followed the method described in a previous research [27]
Summary
The Photocatalysis irradiation of is a acertain wavelength of light forcan theproduce degradation matter and promising technology, which a kindofof organic active free radicals microorganism inactivation and other fields under a mild condition [7]. In the whole photocatalytic under the irradiation of a certain wavelength of light for the degradation of organic matter and process, the excellent photocatalyst is one of under the keya factors to improve system performance and microorganism inactivation and other fields mild condition [7]. There in all photocatalytic attracted great attention because of its appropriate band gap (2.7 are eV),still lowdefects cost, non-toxicity, and good materials, such as high recombination rate of photogenerated electrons and holes, and insufficient photochemical and chemical stability [8,9,10,11].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
