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Perumal S, Atchudan R, Ramalingam S, Aldawood S, Devarajan N, Lee W, Lee YR. Silver nanoparticles loaded graphene-poly-vinylpyrrolidone composites as an effective recyclable antimicrobial agent. ENVIRONMENTAL RESEARCH 2023; 216:114706. [PMID: 36336094 DOI: 10.1016/j.envres.2022.114706] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/19/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Silver nanoparticles (AgNPs) are often used as antibacterial agents. Here, graphene-silver nanoparticles (G-Ag) and graphene-silver nanoparticles poly-vinylpyrrolidone (G-AgPVPy) were prepared by chemical reduction and in-situ polymerization of vinylpyrrolidone (VPy). The prepared G-Ag and G-AgPVPy composites were characterized using various techniques. The size of the AgNPs on the graphene surface in the prepared G-Ag and G-AgPVPy composites was measured as ∼20 nm. The graphene sheets size in the G-Ag and G-AgPVPy composites were measured as 6.0-2.0 μm and 4.0-0.10 μm, respectively, which are much smaller than graphene sheets in graphite powder (GP) (10.0-3.0 μm). The physicochemical analysis confirmed the formation of G-Ag and G-AgPVPy composites and even the distribution of AgNPs and PVPy on the graphene sheets. The synthesized composites (G-AgPVPy, G-Ag) exhibited a broad-spectrum antibacterial potential against both Gram-negative and Gram-positive bacteria. The lowest minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values were calculated as >40 μg/mL using G-Ag and GP, while G-AgPVPy showed as 10 μg/mL against Staphylococcus aureus. Among GP, G-Ag, and G-AgPVPy, G-AgPVPy disturbs the cell permeability, damages the cell walls, and causes cell death efficiently. Also, G-AgPVPy was delivered as a significant reusable antibacterial potential candidate. The MIC value (10 μg/mL) did not change up to six subsequent MIC analysis cycles.
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Affiliation(s)
- Suguna Perumal
- Department of Chemistry, Sejong University, Seoul, 143-747, Republic of Korea; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea.
| | - Raji Atchudan
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea; Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, Tamil Nadu, India
| | - Srinivasan Ramalingam
- Department of Food Science and Technology, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea
| | - S Aldawood
- Department of Physics and Astronomy, College of Science, P.O. BOX 2455, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Natarajan Devarajan
- Natural Drug Research Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Wonmok Lee
- Department of Chemistry, Sejong University, Seoul, 143-747, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea.
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2
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Thakkar S, De Luca L, Gaspa S, Mariani A, Garroni S, Iacomini A, Stagi L, Innocenzi P, Malfatti L. Comparative Evaluation of Graphene Nanostructures in GERS Platforms for Pesticide Detection. ACS OMEGA 2022; 7:5670-5678. [PMID: 35224328 PMCID: PMC8867560 DOI: 10.1021/acsomega.1c04863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Graphene-enhanced Raman scattering (GERS) produces enhancement of the Raman signal, which is based on chemical rather than electromagnetic mechanism such as in the surface-enhanced Raman scattering. Graphene oxide, amino- and guanidine-functionalized graphene oxide, exfoliated graphene, and commercial graphene nanoplatelets have been used to investigate the GERS response with the change of graphene properties. Different graphene nanostructures have been embedded into organic-inorganic microporous films to build a platform for the fast and sensitive detection of pesticides in water. The graphene nanostructures vary in the number of layers, lateral size, degree of oxidation, and surface functionalization. The GERS performances of the graphene nanostructures cast on silicon substrates and embedded in the nanocomposite films have been comparatively evaluated. After casting a few droplets of the pesticide aqueous solution on the graphene nanostructures, the Raman band enhancements of the analytes have been measured. In the nanocomposite films, the characteristic Raman bands originating from pesticides such as paraoxon, parathion, and glyphosate could be traced at concentrations below 10-7, 10-5, and 10-4 M, respectively. The results show that the surface functionalization reduces the GERS effect because it increases the ratio between the sp3 carbon and sp2 carbon. On the other hand, the comparison among different types of graphenes shows that the monolayers are more efficient than the few-layer nanostructures in enhancing the Raman signal.
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Affiliation(s)
- Swapneel Thakkar
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
| | - Lidia De Luca
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Silvia Gaspa
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Alberto Mariani
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sebastiano Garroni
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Antonio Iacomini
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Luigi Stagi
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Plinio Innocenzi
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
| | - Luca Malfatti
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
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3
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Dai X, Li S, Li S, Ke K, Pang J, Wu C, Yan Z. High antibacterial activity of chitosan films with covalent organic frameworks immobilized silver nanoparticles. Int J Biol Macromol 2022; 202:407-417. [PMID: 34999048 DOI: 10.1016/j.ijbiomac.2021.12.174] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/09/2021] [Accepted: 12/27/2021] [Indexed: 12/20/2022]
Abstract
In this study, chitosan (CS) film containing covalent organic frameworks (COFs) immobilized silver nanoparticles (AgNPs) were developed for food packaging with improved antibacterial activities and film properties. COFs-AgNPs were fabricated via in-situ synthesis of immobilizing AgNPs on COFs. Transmission electron microscope, Zeta potential, X-ray diffraction, element mapping and Fourier transform infrared spectroscopy confirmed the successful fabrication of COFs-AgNPs, and COFs-AgNPs showed superior antibacterial activity against S. aureus and E. coli. Furthermore, the as-prepared COFs-AgNPs composite was further used to fabricate CS composite films (CS/COFs-AgNPs) by a solution casting method. The findings showed that the tensile strength of the nanocomposite films enhanced dramatically with the increase of the COFs-AgNPs content, while the UV-visible light barrier property, water swelling and solubility properties, and water vapor permeability (WVP) decreased significantly. Not only that, the CS/COFs-AgNPs nanocomposite films also showed outstanding antibacterial activity and effectively prolonged the storage time of white crucian carp (Carassius auratus). As a result, CS/COFs-AgNPs nanocomposite films show great potential in active food packaging.
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Affiliation(s)
- Xinxian Dai
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Si Li
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shuhan Li
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Keqin Ke
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chunhua Wu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Zhiming Yan
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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4
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High-performance detection of p-nitroaniline on defect-graphene SERS substrate utilizing molecular imprinting technique. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106536] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Thakkar SV, Malfatti L. Silica-graphene porous nanocomposites for environmental remediation: A critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111519. [PMID: 33113395 DOI: 10.1016/j.jenvman.2020.111519] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/24/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
With the increase of industrialization, there is an urgent need for developing technologies to detect and remove toxic pollutants from water bodies. The pollutants are often released to the environment due to the consumption of raw materials that are necessary for the production of technological goods (such as chemical and pharmaceutical compounds, metals, and alloys or foods). Amongst all the remediation techniques, adsorption is considered as one of the preferred techniques, due to its fast and efficient removal of contaminants. Novel materials, which are engineered for selective and responsive water remediation, have also recently revealed a strong potential in the detection of pollutants. Here, current trends of silica-graphene (SG) porous composites for the removal of oils, organic solvents, heavy metals, and dyes are reviewed in detail. Insights on the modifications of composites to enhance their sorption performance have been highlighted. In addition, the detection of pollutants using porous SG nanocomposites is also critically reviewed. Overall, SG composites reveal a strong potential as nanostructure materials with improved efficiency for environmental-based applications.
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Affiliation(s)
- Swapneel Vijay Thakkar
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
| | - Luca Malfatti
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
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Liao J, He S, Guo S, Luan P, Mo L, Li J. Antibacterial Performance of a Mussel-Inspired Polydopamine-Treated Ag/Graphene Nanocomposite Material. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3360. [PMID: 31618859 PMCID: PMC6829421 DOI: 10.3390/ma12203360] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/04/2019] [Accepted: 10/12/2019] [Indexed: 11/16/2022]
Abstract
Graphene-based nanocomposites have attracted tremendous attention in recent years. In this study, a facile yet effective approach was developed to synthesize reduced graphene oxide and an Ag-graphene nanocomposite. The basic strategy involved in the preparation of reduced graphene oxide includes reducing graphene oxide with dopamine, followed by in situ syntheses of the Ag-PDA-reducing graphene oxide (RGO) nanocomposite through adding AgNO3 solution and a small amount of dopamine. The nanocomposite was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), FTIR spectra, Raman spectra, ultraviolet-visible (UV-vis), and X-ray photoelectron spectroscopy (XPS), results indicated that a uniform PDA film is formed on the surface of the GO and GO is successfully reduced. Besides, the in situ synthesized Ag nanoparticles (AgNPs) were evenly distributed on the RGO surface. To investigate antibacterial properties Ag-PDA-RGO, different dosages were selected for evaluating the antibacterial activity against Gram-positive bacteria Staphylococcus aureus and Gram-negative bacteria Escherichia coli. The Ag-PDA-RGO nanocomposites displayed excellent antibacterial property. The antibacterial ratio reached 99.9% against S. aureus and 90.9% against E. coli when the dosage of 100 mg/L Ag-PDA-RGO nanocomposites was 100 μL. The novel Ag-PDA-RGO nanocomposite prepared by a facile yet effective, environmentally friendly, and low-cost method holds great promise in a wide range of modern biomedical applications.
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Affiliation(s)
- Jianming Liao
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Shuaiming He
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Shasha Guo
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Pengcheng Luan
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Lihuan Mo
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Jun Li
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
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7
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Innocenzi P, Malfatti L. Mesoporous materials as platforms for surface-enhanced Raman scattering. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.02.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Silver A, Kitadai H, Liu H, Granzier-Nakajima T, Terrones M, Ling X, Huang S. Chemical and Bio Sensing Using Graphene-Enhanced Raman Spectroscopy. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E516. [PMID: 30986978 PMCID: PMC6523487 DOI: 10.3390/nano9040516] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/14/2019] [Accepted: 03/18/2019] [Indexed: 01/16/2023]
Abstract
Graphene is a two-dimensional (2D) material consisting of a single sheet of sp² hybridized carbon atoms laced in a hexagonal lattice, with potentially wide usage as a Raman enhancement substrate, also termed graphene-enhanced Raman scattering (GERS), making it ideal for sensing applications. GERS improves upon traditional surface-enhanced Raman scattering (SERS), combining its single-molecule sensitivity and spectral fingerprinting of molecules, and graphene's simple processing and superior uniformity. This enables fast and highly sensitive detection of a wide variety of analytes. Accordingly, GERS has been investigated for a wide variety of sensing applications, including chemical- and bio-sensing. As a derivative of GERS, the use of two-dimensional materials other than graphene for Raman enhancement has emerged, which possess remarkably interesting properties and potential wider applications in combination with GERS. In this review, we first introduce various types of 2D materials, including graphene, MoS₂, doped graphene, their properties, and synthesis. Then, we describe the principles of GERS and comprehensively explain how the GERS enhancement factors are influenced by molecular and 2D material properties. In the last section, we discuss the application of GERS in chemical- and bio-sensing, and the prospects of such a novel sensing method.
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Affiliation(s)
- Alexander Silver
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Hikari Kitadai
- Department of Chemistry, Boston University, Boston, MA 02215, USA.
| | - He Liu
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
| | | | - Mauricio Terrones
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
- Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.
- Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Xi Ling
- Department of Chemistry, Boston University, Boston, MA 02215, USA.
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA.
- The Photonics Center, Boston University, Boston, MA 02215, USA.
| | - Shengxi Huang
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
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