Bio-approach: preparation of RGO-AgNPs on cotton fabric and interface with sweat environment for antibacterial activity

This study aims to develop a reduced graphene oxide (RGO)-silver nanoparticles (AgNPs) coating on the cotton fabric (CT) surface using photoreduction with a hydrothermal process and evaluate the antibacterial activity in a sweat environment. An ureolytic bacterium of Bacillus subtilis (HM475276) was...

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Bibliographic Details
Published in:Bioprocess and biosystems engineering 2022-11, Vol.45 (11), p.1825-1837
Main Authors: Dhandapani, Perumal, Santhoshkumar, Murali, Narenkumar, Jayaraman, AlSalhi, Mohamad S., Kumar, Paulraj Arun, Devanesan, Sandhanasamy, Kokilaramani, Seenivasan, Rajasekar, Aruliah
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Ammonia
Ammonium
Antibacterial activity
Atomic absorption spectroscopy
Biotechnology
Chemistry
Chemistry and Materials Science
Computed tomography
Controlled release
Cotton
Cotton fabrics
Durability
Environmental Engineering/Biotechnology
Food Science
Graphene
Hydroxyl radicals
Inactivation
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Laundry
Nanoparticles
Photoelectrons
Photoreduction
Research Paper
Silver
Silver chloride
Spectral analysis
Spectrum analysis
Surface chemistry
Sustained release
Sweat
X ray absorption
X ray photoelectron spectroscopy
X ray powder diffraction
X-ray absorption spectroscopy
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Summary:This study aims to develop a reduced graphene oxide (RGO)-silver nanoparticles (AgNPs) coating on the cotton fabric (CT) surface using photoreduction with a hydrothermal process and evaluate the antibacterial activity in a sweat environment. An ureolytic bacterium of Bacillus subtilis (HM475276) was used to generate ammonia from synthetic urine. RGO-AgNPs were synthesized on the CT surface using a moderate dosage of 1% silver ammonium complex. The analytical study reveals that spherical-shaped AgNPs of 10–50 nm size were uniformly anchored throughout the RGO sheet on the CT, further supported by X-ray photoelectron spectroscopic analysis (XPS). X-ray powder diffraction (XRD) and Energy-dispersive X-ray absorption spectroscopy (EDAX) elemental mapping confirmed Ag/AgCl formation on CT treated with sweat. The sustained release of Ag + ions from the treated CT in the sweat solution was assessed by atomic absorption spectroscopy (AAS) and ranged from 2 to 8 ppm, correlated with antibacterial activity. The agar diffusion and solution suspension method to demonstrate the combat bacterial species were greater on RGO-AgNPs-CT than sweat-treated CT due to the suppression of Ag + ion release caused by the deposition of Ag/AgCl. Hence, sweat-treated RGO-AgNPs-CT proved to have higher inactivation activity (45 min) than sweat-treated AgNPs-CT (60 min) due to the RGO-Ag/AgCl serving photocatalyst influencing hydroxyl radical (OH · ) formation under sunlight. The RGO-AgNPs-CT has confirmed that it retains antibacterial activity after passing the laundry durability test. Together, the results showed an opportunity for improved functional fabrics that are exceptional at combating bacterial pathogens and holding up well to laundry durability tests.
ISSN:1615-7591
1615-7605
DOI:10.1007/s00449-022-02789-7