Abstract
Ag/Ag3PO4 nanomaterial modified BiPO4 photocatalysts (Ag/Ag3PO4/BiPO4) were synthesized by sonochemical method. The BiPO4 and Ag/Ag3PO4/BiPO4 photocatalysts were characterized by XRD, UV–Vis DRS, Raman, and TEM analysis. The photocatalytic activity of the prepared heterostructures was studied through the photodegradation of methylene blue (MB) under visible-light irradiation (λ > 420 nm, 70 W/cm2). The photodegradation of MB was found to be follow pseudo-first-order kinetics. The antimicrobial activity of the prepared heterostructures has also been evaluated in the disinfection of pathogens (Escherichia coli and Staphylococcus aureus). The prepared Ag/Ag3PO4/BiPO4 photocatalysts displayed considerably higher photocatalytic activity (>99% degradation within 25 min and >99% disinfection within 20 min) than did pure BiPO4. This enhanced photocatalytic activity of the Ag/Ag3PO4/BiPO4 photocatalysts can be attributed to the high separation efficiency and low recombination rate of photogenerated electron–hole pairs, as well as the Ag+ ions release under visible light irradiation. The possible mechanism underlying the enhanced photocatalytic activities of the Ag/Ag3PO4/BiPO4 photocatalysts is also provided.
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Acknowledgements
This study was supported by the Ministry of Science and Technology under contract (MOST 105-2113-M-018-007). We thank Wallace Academic Editing for the English language editing.
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Yen-Jui Chen and Chi-Shun Tseng have contributed equally.
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Chen, YJ., Tseng, CS., Tseng, PJ. et al. Synthesis and characterization of Ag/Ag3PO4 nanomaterial modified BiPO4 photocatalyst by sonochemical method and its photocatalytic application. J Mater Sci: Mater Electron 28, 11886–11899 (2017). https://doi.org/10.1007/s10854-017-6997-0
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DOI: https://doi.org/10.1007/s10854-017-6997-0