Light induced antibacterial activity and photocatalytic properties of Ag/Ag3PO4 -based material of marine origin
authors Piccirillo, C; Pinto, RA; Tobaldi, DM; Pullar, RC; Labrincha, JA; Pintado, MME; Castro, PML
nationality International
journal JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
author keywords Ag3PO4; Photocatalysis; Antibacterial activity; By-products valorisation
keywords STAPHYLOCOCCUS-AUREUS MRSA; PHOSPHATE-BASED MATERIALS; TRICALCIUM PHOSPHATE; TITANIUM-DIOXIDE; TREATMENT PLANTS; METHYLENE-BLUE; AG3PO4; WATER; SEMICONDUCTOR; DEGRADATION
abstract Fish bones were converted into materials consisting of silver phosphate (Ag3PO4), beta-calcium phosphate (beta-Ca-3(PO4)(2), beta-TCP) and hydroxyapatite (Ca-10(PO4)(6)(OH)(2), HAp), as well as of metallic silver (Ag-0), with a simple treatment in solution and calcination (650 or 1000 degrees 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. (C) 2014 Published by Elsevier B.V.
publisher ELSEVIER SCIENCE SA
issn 1010-6030
year published 2015
volume 296
beginning page 40
ending page 47
digital object identifier (doi) 10.1016/j.jphotochem.2014.09.012
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000346891400006
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.891
5 year journal impact factor 2.680
category normalized journal impact factor percentile 56.122
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg