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Giraud L, Marsan O, Dague E, Ben-Neji M, Cougoule C, Meunier E, Soueid S, Galibert AM, Tourrette A, Flahaut E. Surface-anchored carbon nanomaterials for antimicrobial surfaces. NANOSCALE 2024. [PMID: 39171440 DOI: 10.1039/d4nr02810d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Carbon nanomaterials (CNMs) are known for their antimicrobial (antibacterial and antiviral) activity when dispersed in a liquid, but whether this can be transferred to the surface of common materials has rarely been investigated. We have compared two typical CNMs (double-walled carbon nanotubes and few-layer graphene) in their non-oxidised and oxidised forms in terms of their antibacterial (Pseudomonas aeruginosa and Staphylococcus aureus) and antiviral (SARS-CoV2) activities after anchoring them onto the surface of silicone. We propose a very simple and effective protocol using the air-brush spray deposition method to entrap CNMs on the surfaces of two different silicone materials and demonstrate that the nanomaterials are anchored within the polymer while still being in contact with bacteria. We also investigated their antiviral activity against SARS-COV2 after deposition on standard surgical respiratory masks. Our results show that while suspensions of double-walled carbon nanotubes had a moderate effect on P. aeruginosa, this was not transferred after anchoring them to the surface of silicone. In contrast, graphene oxide showed a very strong antibacterial effect on P. aeruginosa and oxidised double-walled carbon nanotubes on S. aureus only when anchored to the surface. No significant antiviral activity was observed. This work paves the way for new antibacterial surfaces based on CNMs.
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Affiliation(s)
- L Giraud
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
| | - O Marsan
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
| | - E Dague
- LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France
| | - M Ben-Neji
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
| | - C Cougoule
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
| | - E Meunier
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
| | - S Soueid
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
| | - A M Galibert
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
| | - A Tourrette
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
| | - E Flahaut
- CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
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2
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Singh G, Rana A, Smriti. Decoding antimicrobial resistance: unraveling molecular mechanisms and targeted strategies. Arch Microbiol 2024; 206:280. [PMID: 38805035 DOI: 10.1007/s00203-024-03998-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/07/2024] [Accepted: 05/08/2024] [Indexed: 05/29/2024]
Abstract
Antimicrobial resistance poses a significant global health threat, necessitating innovative approaches for combatting it. This review explores various mechanisms of antimicrobial resistance observed in various strains of bacteria. We examine various strategies, including antimicrobial peptides (AMPs), novel antimicrobial materials, drug delivery systems, vaccines, antibody therapies, and non-traditional antibiotic treatments. Through a comprehensive literature review, the efficacy and challenges of these strategies are evaluated. Findings reveal the potential of AMPs in combating resistance due to their unique mechanisms and lower propensity for resistance development. Additionally, novel drug delivery systems, such as nanoparticles, show promise in enhancing antibiotic efficacy and overcoming resistance mechanisms. Vaccines and antibody therapies offer preventive measures, although challenges exist in their development. Non-traditional antibiotic treatments, including CRISPR-Cas systems, present alternative approaches to combat resistance. Overall, this review underscores the importance of multifaceted strategies and coordinated global efforts to address antimicrobial resistance effectively.
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Affiliation(s)
- Gagandeep Singh
- Department of Biosciences (UIBT), Chandigarh University, Punjab, 140413, India
| | - Anita Rana
- Department of Biosciences (UIBT), Chandigarh University, Punjab, 140413, India.
| | - Smriti
- Department of Biosciences (UIBT), Chandigarh University, Punjab, 140413, India
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3
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Plotniece A, Sobolev A, Supuran CT, Carta F, Björkling F, Franzyk H, Yli-Kauhaluoma J, Augustyns K, Cos P, De Vooght L, Govaerts M, Aizawa J, Tammela P, Žalubovskis R. Selected strategies to fight pathogenic bacteria. J Enzyme Inhib Med Chem 2023; 38:2155816. [PMID: 36629427 PMCID: PMC9848314 DOI: 10.1080/14756366.2022.2155816] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Natural products and analogues are a source of antibacterial drug discovery. Considering drug resistance levels emerging for antibiotics, identification of bacterial metalloenzymes and the synthesis of selective inhibitors are interesting for antibacterial agent development. Peptide nucleic acids are attractive antisense and antigene agents representing a novel strategy to target pathogens due to their unique mechanism of action. Antisense inhibition and development of antisense peptide nucleic acids is a new approach to antibacterial agents. Due to the increased resistance of biofilms to antibiotics, alternative therapeutic options are necessary. To develop antimicrobial strategies, optimised in vitro and in vivo models are needed. In vivo models to study biofilm-related respiratory infections, device-related infections: ventilator-associated pneumonia, tissue-related infections: chronic infection models based on alginate or agar beads, methods to battle biofilm-related infections are discussed. Drug delivery in case of antibacterials often is a serious issue therefore this review includes overview of drug delivery nanosystems.
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Affiliation(s)
- Aiva Plotniece
- Latvian Institute of Organic Synthesis, Riga, Latvia,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Riga Stradiņš University, Riga, Latvia,CONTACT Aiva Plotniece Latvian Institute of Organic Synthesis, Riga, Latvia
| | | | - Claudiu T. Supuran
- Department of NEUROFARBA, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Firenze, Italy
| | - Fabrizio Carta
- Department of NEUROFARBA, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Firenze, Italy
| | - Fredrik Björkling
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, Center for Peptide-Based Antibiotics, University of Copenhagen, Copenhagen East, Denmark
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, Center for Peptide-Based Antibiotics, University of Copenhagen, Copenhagen East, Denmark
| | - Jari Yli-Kauhaluoma
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, Drug Research Program, University of Helsinki, Helsinki, Finland
| | - Koen Augustyns
- Infla-Med, Centre of Excellence, University of Antwerp, Antwerp, Belgium,Laboratory of Medicinal Chemistry, University of Antwerp, Antwerp, Belgium
| | - Paul Cos
- Department of Pharmaceutical Sciences, Laboratory for Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Antwerp, Belgium
| | - Linda De Vooght
- Department of Pharmaceutical Sciences, Laboratory for Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Antwerp, Belgium
| | - Matthias Govaerts
- Department of Pharmaceutical Sciences, Laboratory for Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Antwerp, Belgium
| | - Juliana Aizawa
- Department of Pharmaceutical Sciences, Laboratory for Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Antwerp, Belgium
| | - Päivi Tammela
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, Drug Research Program, University of Helsinki, Helsinki, Finland
| | - Raivis Žalubovskis
- Latvian Institute of Organic Synthesis, Riga, Latvia,Faculty of Materials Science and Applied Chemistry, Institute of Technology of Organic Chemistry, Riga Technical University, Riga, Latvia
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4
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Asaftei M, Lucidi M, Cirtoaje C, Holban AM, Charitidis CA, Yang F, Wu A, Stanciu GA, Sağlam Ö, Lazar V, Visca P, Stanciu SG. Fighting bacterial pathogens with carbon nanotubes: focused review of recent progress. RSC Adv 2023; 13:19682-19694. [PMID: 37396836 PMCID: PMC10308885 DOI: 10.1039/d3ra01745a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/13/2023] [Indexed: 07/04/2023] Open
Abstract
The fast and global spread of bacterial resistance to currently available antibiotics results in a great and urgent need for alternative antibacterial agents and therapeutic strategies. Recent studies on the application of nanomaterials as antimicrobial agents have demonstrated their potential for the management of infectious diseases. Among the diverse palette of nanomaterials currently used in biomedical applications, carbon nanotubes (CNTs) have gained massive interest given their many valuable properties, such as high thermal and electrical conductivity, tensile strength, flexibility convenient aspect ratio, and low fabrication costs. All these features are augmented by facile conjugation with functional groups. CNTs are currently available in many configurations, with two main categories being single-walled and multi-walled CNTs, depending on the number of rolled-up single-layer carbon atoms sheets making up the nanostructure. Both classes have been identified over the past years as promising antibacterial agents but the current level of understanding of their efficiency still harbors many pending questions. This mini-review surveys recent progress on the topic of antibacterial effects of CNTs and examines the proposed mechanisms of action(s) of different CNT typologies, placing the main focus on past studies addressing the antibacterial activity on Staphylococcus aureus and Escherichia coli, two prototypical Gram-positive and Gram-negative pathogens, respectively.
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Affiliation(s)
- Mihaela Asaftei
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
- Department of Microbiology, University of Bucharest Romania
| | - Massimiliano Lucidi
- Department of Science, Roma Tre University Rome 00146 Italy
- NBFC, National Biodiversity Future Center Palermo 90133 Italy
| | | | | | - Costas A Charitidis
- Research Lab of Advanced, Composite, Nano-Materials and Nanotechnology, School of Chemical Engineering, National Technical University of Athens Greece
| | - Fang Yang
- CIXI Institute for Biomedical Engineering, Ningbo Institute for Materials Technology and Engineering, Chinese Academy of Sciences China
| | - Aiguo Wu
- CIXI Institute for Biomedical Engineering, Ningbo Institute for Materials Technology and Engineering, Chinese Academy of Sciences China
| | - George A Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
| | - Özge Sağlam
- Department of Mechanical Engineering, İzmir University of Economics Turkey
| | - Veronica Lazar
- Department of Microbiology, University of Bucharest Romania
| | - Paolo Visca
- Department of Science, Roma Tre University Rome 00146 Italy
- Santa Lucia Foundation IRCCS Rome 00179 Italy
| | - Stefan G Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
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5
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Yao J, Zou P, Cui Y, Quan L, Gao C, Li Z, Gong W, Yang M. Recent Advances in Strategies to Combat Bacterial Drug Resistance: Antimicrobial Materials and Drug Delivery Systems. Pharmaceutics 2023; 15:pharmaceutics15041188. [PMID: 37111673 PMCID: PMC10141387 DOI: 10.3390/pharmaceutics15041188] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/28/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Bacterial infection is a common clinical disease. Antibiotics have saved countless lives since their discovery and are a powerful weapon in the fight against bacteria. However, with the widespread use of antibiotics, the problem of drug resistance now poses a great threat to human health. In recent years, studies have investigated approaches to combat bacterial resistance. Several antimicrobial materials and drug delivery systems have emerged as promising strategies. Nano-drug delivery systems for antibiotics can reduce the resistance to antibiotics and extend the lifespan of novel antibiotics, and they allow targeting drug delivery compared to conventional antibiotics. This review highlights the mechanistic insights of using different strategies to combat drug-resistant bacteria and summarizes the recent advancements in antimicrobial materials and drug delivery systems for different carriers. Furthermore, the fundamental properties of combating antimicrobial resistance are discussed, and the current challenges and future perspectives in this field are proposed.
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Affiliation(s)
- Jiaxin Yao
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Pengfei Zou
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Yanan Cui
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Liangzhu Quan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
- School of Pharmacy, Guangxi Medical University, Nanning 530021, China
| | - Chunsheng Gao
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Zhiping Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Wei Gong
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Meiyan Yang
- School of Pharmacy, Guangxi Medical University, Nanning 530021, China
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6
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Schifano E, Cavoto G, Pandolfi F, Pettinari G, Apponi A, Ruocco A, Uccelletti D, Rago I. Plasma-Etched Vertically Aligned CNTs with Enhanced Antibacterial Power. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1081. [PMID: 36985974 PMCID: PMC10054568 DOI: 10.3390/nano13061081] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/01/2023] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
The emergence of multidrug-resistant bacteria represents a growing threat to public health, and it calls for the development of alternative antibacterial approaches not based on antibiotics. Here, we propose vertically aligned carbon nanotubes (VA-CNTs), with a properly designed nanomorphology, as effective platforms to kill bacteria. We show, via a combination of microscopic and spectroscopic techniques, the ability to tailor the topography of VA-CNTs, in a controlled and time-efficient manner, by means of plasma etching processes. Three different varieties of VA-CNTs were investigated, in terms of antibacterial and antibiofilm activity, against Pseudomonas aeruginosa and Staphylococcus aureus: one as-grown variety and two varieties receiving different etching treatments. The highest reduction in cell viability (100% and 97% for P. aeruginosa and S. aureus, respectively) was observed for the VA-CNTs modified using Ar and O2 as an etching gas, thus identifying the best configuration for a VA-CNT-based surface to inactivate both planktonic and biofilm infections. Additionally, we demonstrate that the powerful antibacterial activity of VA-CNTs is determined by a synergistic effect of both mechanical injuries and ROS production. The possibility of achieving a bacterial inactivation close to 100%, by modulating the physico-chemical features of VA-CNTs, opens up new opportunities for the design of self-cleaning surfaces, preventing the formation of microbial colonies.
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Affiliation(s)
- Emily Schifano
- Dipartimento di Biologia e Biotecnologia “C. Darwin”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- SNN Lab, Sapienza Nanotechnology & Nano-Science Laboratory, Sapienza University of Rome, 00100 Rome, Italy
| | - Gianluca Cavoto
- Dipartimento di Fisica, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | | | - Giorgio Pettinari
- Istituto di Fotonica e Nanotecnologie, CNR-IFN, Via del Fosso del Cavaliere 100, 00133 Rome, Italy
| | - Alice Apponi
- Dipartimento di Scienze, Università Degli Studi Roma Tre and INFN Sezione di Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
| | - Alessandro Ruocco
- Dipartimento di Scienze, Università Degli Studi Roma Tre and INFN Sezione di Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
| | - Daniela Uccelletti
- Dipartimento di Biologia e Biotecnologia “C. Darwin”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- SNN Lab, Sapienza Nanotechnology & Nano-Science Laboratory, Sapienza University of Rome, 00100 Rome, Italy
| | - Ilaria Rago
- Dipartimento di Fisica, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
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7
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Hadidi N, Mohebbi M. Anti-Infective and Toxicity Properties of Carbon Based Materials: Graphene and Functionalized Carbon Nanotubes. Microorganisms 2022; 10:microorganisms10122439. [PMID: 36557692 PMCID: PMC9784703 DOI: 10.3390/microorganisms10122439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 11/30/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
Recently, antimicrobial activities of various carbon-based nanomaterials against specific pathogens have become one of the most significant research interests in this field. Carbon nanotubes (CNTs) are promising multidisciplinary nanostructures in biomedicine, drug delivery, genetic engineering, biosensors, and artificial implants. However, the biomedical administration of CNTs is dependent on their solubility, toxicity, and biocompatibility, as well as novel drug-delivery applications through optimization of the drug's loading capacity, cellular absorption, and continuous release within the target cell. The usage of CNTs and Graphene materials as antimicrobial agents and nanocarriers for antibiotics delivery would possibly improve their bioavailability and facilitate better anti-infective therapy. However, it is worth mentioning that CNTs' antimicrobial activity and toxicity are highly dependent on their preparation and synthesis method. Various types of research have confirmed that diameter, length, residual catalyst, metal content, surface coating, electronic structure, and dispersibility would affect CNTs' toxicity toward bacteria and human cells. In this review article, a general study was performed on the antimicrobial properties of carbon-based nanomaterials, as well as their toxicity and applications in confronting different microorganisms. This study could be useful for researchers who are looking for new and effective drug delivery methods in the field of microbial resistance.
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8
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Basavegowda N, Baek KH. Combination Strategies of Different Antimicrobials: An Efficient and Alternative Tool for Pathogen Inactivation. Biomedicines 2022; 10:2219. [PMID: 36140320 PMCID: PMC9496525 DOI: 10.3390/biomedicines10092219] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/02/2022] [Accepted: 09/04/2022] [Indexed: 11/16/2022] Open
Abstract
Despite the discovery and development of an array of antimicrobial agents, multidrug resistance poses a major threat to public health and progressively increases mortality. Recently, several studies have focused on developing promising solutions to overcome these problems. This has led to the development of effective alternative methods of controlling antibiotic-resistant pathogens. The use of antimicrobial agents in combination can produce synergistic effects if each drug invades a different target or signaling pathway with a different mechanism of action. Therefore, drug combinations can achieve a higher probability and selectivity of therapeutic responses than single drugs. In this systematic review, we discuss the combined effects of different antimicrobial agents, such as plant extracts, essential oils, and nanomaterials. Furthermore, we review their synergistic interactions and antimicrobial activities with the mechanism of action, toxicity, and future directions of different antimicrobial agents in combination. Upon combination at an optimum synergistic ratio, two or more drugs can have a significantly enhanced therapeutic effect at lower concentrations. Hence, using drug combinations could be a new, simple, and effective alternative to solve the problem of antibiotic resistance and reduce susceptibility.
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Affiliation(s)
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongsan 38451, Korea
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9
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Khalatbary M, Sayadi MH, Hajiani M, Nowrouzi M, Homaeigohar S. Green, Sustainable Synthesis of γ-Fe 2O 3/MWCNT/Ag Nano-Composites Using the Viscum album Leaf Extract and Waste Car Tire for Removal of Sulfamethazine and Bacteria from Wastewater Streams. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12162798. [PMID: 36014663 PMCID: PMC9412352 DOI: 10.3390/nano12162798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 06/02/2023]
Abstract
Multi-walled carbon nanotubes (MWCNTs) decorated with Ag nanoparticles (NPs) are bifunctional adsorbent nanomaterials with antibacterial activity. They can be magnetically recovered from wastewater in case of coupling with γ-Fe2O3. In this study, for the first time, an environmentally friendly technique was applied to prepare a nanocomposite (NC) material composed of γ-Fe2O3/MWCNT/Ag by using Bridgestone disposable tires and Viscum album leaves extract. γ-Fe2O3/MWCNTs/Ag NC was employed for the removal of sulfamethazine (SMT) from aqueous solutions. Under the optimized conditions determined via the Taguchi method, the highest SMT adsorption capacity of the γ-Fe2O3/MWCNT/Ag NC was measured to be 47.6 mg/g. The experimental data fitted well with the pseudo-second-order kinetic model and the Langmuir isotherm. The thermodynamic parameters implied that the adsorption process was endothermic. In addition to adsorption of the drug pollutant, the NC demonstrated a superior antibacterial activity against Gram-positive bacteria. The reusability test also showed that over 79% SMT can be removed using γ-Fe2O3/MWCNTs/Ag NC even after four adsorption cycles. Taken together, γ-Fe2O3/MWCNTs/Ag NC was proven to be a promising antibacterial nano-adsorbent for wastewater treatment.
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Affiliation(s)
- Mansooreh Khalatbary
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, University of Birjand, Birjand P.O. Box 97175/615, Iran
| | - Mohammad Hossein Sayadi
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, University of Birjand, Birjand P.O. Box 97175/615, Iran
| | - Mahmood Hajiani
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, University of Birjand, Birjand P.O. Box 97175/615, Iran
| | - Mohsen Nowrouzi
- Department of Science and Biotechnology, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr 75169-13798, Iran
| | - Shahin Homaeigohar
- School of Science and Engineering, University of Dundee, Dundee DD1 4HN, UK
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10
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Cancer Treatment by Laser and Electrochemical Therapy Combined with Magnetic Nanoparticles as Potent Therapy Against Ehrlich Ascites Carcinoma. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-022-00983-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Elsehly EM, Chechenin NG, Makunin AV, Shemukhin AA, Motaweh HA. Surface functionalization of multi-walled carbon nanotubes by ozone and the enhancement of their environmental applications. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/abaafd] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Selective functionalization of multiwalled carbon nanotubes (MWNTs) is essential for many prospective applications of such materials. In the present study, MWNTs grown by chemical vapor deposition are functionalized by ozone treatment at room temperature. Through this environmental and effective functionalization method, the chemical reactivity of MWNTs can be altered and tuned. Ozone functionalized MWNTs (F-MWNTs) were characterized by Raman spectroscopy, SEM, EDS, BET surface area, XPS, and FTIR. The results obtained confirm the formation of oxygen groups attached to the surface of ozone-treated nanotubes (e.g. carboxyl), which modify their physicochemical properties and boost the surface reactivity. The F-MWNT filters showed 99.5% manganese removal efficiency at 20 ppm concentration in the solution, which is higher than the efficiency reported earlier. The optimal parameters for Mn adsorption by F-MWNTs were studied. Possible mechanisms of F-MWNT adsorption processes are also discussed.
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