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Penke YK, Murugan PA, Matheshwaran S, Ramkumar J, Kar KK. Anti-bacterial and arsenic remediation insights in aqueous systems onto heterogeneous metal oxide (Cu 0.52Al 0.1Fe 0.47O 4)/rGO hybrid: an approach towards airborne microbial degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:811-822. [PMID: 35904734 DOI: 10.1007/s11356-022-22169-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Copper-based ternary metal oxide (i.e., Cu0.52Al0.01Fe0.47O4) impregnated reduced graphene oxide nanohybrid is verified for microbial and arsenic treatment. Growth inhibition of colonies are observed around 99.99% (E. coli), and 99.83% (S. aureus) at 10-20 μg/mL of hybrid dosage, respectively. The inhibition rates for both the colonies are increased to 99.9998% at 80 μg/mL. TEM images have shown insight of cell-content/lipid leakage behavior after inoculating with the hybrid. The efficient hindrance towards microbial colony growth is attributed to better charge transfer, reactive oxygen species generation, and metal-ion release. Maximum arsenic sorption capacities are observed around 248 and 314 mg/g for As(III), and As(V), respectively (Ci ~ 500 ppm). Surface morphology studies onto arsenic adsorption are reported with atomic force microscope, and FT-IR/Raman analysis. A detailed discussion onto individual spectra of As 3d spectra confirmed the occurrence of redox transformation in arsenic species [As(III)]. The variation in the quantity (at. %) of oxygen functional groups in O1s spectra (i.e., M-O, M-OH, and -OH2) onto the hybrid supported the ligand-exchange behavior. Cyclic voltammetry study in arsenic electrolytes (10 µM - 1 mM) provides the occurrence of various in-situ electrochemical reactions supporting the redox activity. A significant electromagnetic wave absorption characteristics of the present hybrid is proposed with plausible airborne antimicrobial-agent abilities.
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Affiliation(s)
- Yaswanth K Penke
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India.
- Advanced Nano Engineering Materials Laboratory, Department of Mechanical Engineering, and Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur, 208016, U.P, India.
| | - Prem Anand Murugan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India
| | - Saravanan Matheshwaran
- Department of Biosciences and Bioengineering, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India.
- Centre for Environmental Science and Engineering Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India.
| | - Janakarajan Ramkumar
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India
- Materials Science Programme, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India
| | - Kamal K Kar
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India.
- Advanced Nano Engineering Materials Laboratory, Department of Mechanical Engineering, and Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur, 208016, U.P, India.
- Materials Science Programme, Indian Institute of Technology Kanpur, 208016, Kanpur, U.P, India.
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Prasad K, Lekshmi GS, Ostrikov K, Lussini V, Blinco J, Mohandas M, Vasilev K, Bottle S, Bazaka K, Ostrikov K. Synergic bactericidal effects of reduced graphene oxide and silver nanoparticles against Gram-positive and Gram-negative bacteria. Sci Rep 2017; 7:1591. [PMID: 28484209 PMCID: PMC5431540 DOI: 10.1038/s41598-017-01669-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 04/03/2017] [Indexed: 02/06/2023] Open
Abstract
Reduced graphene oxide (rGO) is a promising antibacterial material, the efficacy of which can be further enhanced by the addition of silver nanoparticles (nAg). In this study, the mechanisms of antibacterial activity of rGO-nAg nanocomposite against several important human pathogenic multi-drug resistant bacteria, namely Gram-positive coccal Staphylococcus aureus and Gram-negative rod-shaped Escherichia coli and Proteus mirabilis are investigated. At the same concentration (100 µg/ml), rGO-nAg nanocomposite was significantly more effective against all three pathogens than either rGO or nAg. The nanocomposite was equally active against P. mirabilis and S. aureus as systemic antibiotic nitrofurantoin, and significantly more effective against E. coli. Importantly, the inhibition was much faster in the case of rGO-nAg nanocomposite compared to nitrofurantoin, attributed to the synergistic effects of rGO-nAg mediated contact killing and oxidative stress. This study may provide new insights for the better understanding of antibacterial actions of rGO-nAg nanocomposite and for the better designing of graphene-based antibiotics or other biomedical applications.
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Affiliation(s)
- Karthika Prasad
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia
| | - G S Lekshmi
- Department of Nano science and Technology, Anna university, Chennai, 600 025, India
| | - Kola Ostrikov
- School of Engineering, University of Southern Australia, Adelaide, South Australia, 5000, Australia
| | - Vanessa Lussini
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
| | - James Blinco
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
| | - Mandhakini Mohandas
- Department of Nano science and Technology, Anna university, Chennai, 600 025, India
| | - Krasimir Vasilev
- School of Engineering, University of Southern Australia, Adelaide, South Australia, 5000, Australia
| | - Steven Bottle
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia.
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, 4000, Australia.
| | - Kostya Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia.
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, 4000, Australia.
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