Ilmenite-Grafted Graphene Oxide as an Antimicrobial Coating for Fruit Peels.

Autor: Kodithuwakku P; Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka., Jayasundara D; Department of Physics, University of Colombo, Colombo 003000, Sri Lanka., Munaweera I; Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka.; Instrument Center, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka., Jayasinghe R; Department of Civil and Environmental Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Nugegoda 10100, Sri Lanka., Thoradeniya T; Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo 003000, Sri Lanka., Bogahawatta A; Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka., Manuda KRJ; Department of Physics, University of Colombo, Colombo 003000, Sri Lanka., Weerasekera M; Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka., Kottegoda N; Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2024 Jun 07; Vol. 9 (24), pp. 26568-26581. Date of Electronic Publication: 2024 Jun 07 (Print Publication: 2024).
DOI: 10.1021/acsomega.4c03231
Abstrakt: Postharvest loss is a significant global challenge that needs to be urgently addressed to sustain food systems. This study describes a simple microwave-assisted green synthesis method in developing a nanohybrid material combining natural ilmenite (FeTiO 3 ) and graphene oxide (GO) as a promising antimicrobial fruit peel coating to reduce postharvest loss. The natural ilmenite was calcined in an inert environment and was mixed with GO in a microwave reactor to obtain the nanohybrid. The nanohybrid was then incorporated into an alginate biopolymer to form the fruit coating. Microscopic images revealed successful grafting of FeTiO 3 nanoparticles onto the GO sheets. Spectroscopic measurements of Raman, X-ray photoemission, and infrared provided insights into the interactions between the two matrices. The optical band gap calculated from Tauc's relation using UV-vis data showed a significant reduction in the band gap of the hybrid compared to that of natural ilmenite. The antimicrobial activity was assessed using Escherichia coli , which showed a substantial decrease in colony counts. Bananas coated with the nanohybrid showed a doubling in the shelf life compared with uncoated fruits. Consistent with this, the electronic nose (E-nose) measurements and freshness indicator tests revealed less deterioration of the physicochemical properties of the coated bananas. Overall, the results show promising applications for the ilmenite-grafted GO nanohybrid as a food coating capable of minimizing food spoilage due to microbial activity.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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