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Light induced antibacterial activity and photocatalytic properties of Ag/Ag3PO4 -based material of marine origin

Paper ID Volume ID Publish Year Pages File Format Full-Text
26511 43957 2015 8 PDF Available
Title
Light induced antibacterial activity and photocatalytic properties of Ag/Ag3PO4 -based material of marine origin
Abstract

•Ag3PO4-containing material was successfully prepared from cod fish bones.•Ag3PO4 antibacterial activity was tested under light irradiation for the first time.•Light irradiation enhanced the antibacterial properties of the material.•Photocatalytic activity was also tested, under both UV and white light.•Under white light the material had better performance that commercial Degussa P25.

Fish bones were converted into materials consisting of silver phosphate (Ag3PO4), β-calcium phosphate (β-Ca3(PO4)2, β-TCP) and hydroxyapatite (Ca10(PO4)6(OH)2, HAp), as well as of metallic silver (Ag0), with a simple treatment in solution and calcination (650 or 1000 °C). The antibacterial activity of the material was measured in the dark and under UV and white light irradiation; this is the first time that an Ag3PO4-based material was tested under these conditions. Results showed light-enhanced antibacterial properties toward Gram-positive and Gram-negative strains (Methicillin-resistant Staphylococcus aureus – MRSA, Escherichia coli, Pseudomonas aeruginosa), with inactivation rates of up to 99.999% under UV light, and 99% for E. coli under white light (artificial indoor lighting). The photocatalytic activity was also tested, and the degradation of methylene blue dye was observed under both UV and white light. Even if the MB degradation was to a smaller extent under white light, it was approximately twice that of the commercial photocatalyst P25. This work demonstrates the valorisation of a food industry by-product such as fish bones to form a potentially valuable material, with important applications in self sterilizing surfaces and environmental remediation.

Keywords
Ag3PO4; Photocatalysis; Antibacterial activity; By-products valorisation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 296, 1 January 2015, Pages 40–47
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us