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Manikandan V, Palanisamy G, Lee J, F Albeshr M, Fahad Alrefaei A, Pragasan LA, Zhang F, Liu X. Development of silver oxide-loaded reduced graphene oxide nanohybrids for enhanced photocatalytic activity under visible light in aqueous solutions. CHEMOSPHERE 2023:139227. [PMID: 37327825 DOI: 10.1016/j.chemosphere.2023.139227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/30/2023] [Accepted: 06/13/2023] [Indexed: 06/18/2023]
Abstract
We report on the synthesis of silver oxide/reduced graphene oxide nanocomposites (Ag/rGO NCs) using a hydrothermal technique. This paper presents a simple method for synthesizing Ag/rGO hybrid nanocomposites, which can be used for environmentally treating hazardous organic pollutants. The photocatalytic degradation of model artificial Rhodamine B dye and bisphenol A was assessed under visible light illumination. The crystallinity, binding energy, and surface morphologies of the synthesized samples were determined. The silver oxide loading sample resulted in a decrease in the rGO crystallite size. SEM and TEM images demonstrate strong adhesion of the Ag NPs to the rGO sheets. XPS analysis validated the binding energy and elemental composition of the Ag/rGO hybrid nanocomposites. The objective of the experiment was to enhance the photocatalytic efficiency of rGO in the visible region using Ag nanoparticles. The synthesized nanocomposites in the visible region exhibited good photodegradation percentages of approximately 97.5% and 98.6% after 120 min of irradiation for pure rGO, Ag NPs, and Ag/rGO nanohybrid, respectively. Furthermore, the Ag/rGO nanohybrid maintained their degradation ability for up to three cycles. The synthesized Ag/rGO nanohybrid demonstrated enhanced photocatalytic activity, expanding their potential for environmental remediation. Based on the investigations, Ag/rGO nanohybrid proved to be an effective photocatalyst and holds promise as an ideal material for future applications in preventing water pollution.
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Affiliation(s)
- Velu Manikandan
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangno, Nowon-gu, Seoul, South Korea; Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, Tamilnadu, 600 077, India
| | - Govindasamy Palanisamy
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea.
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Mohammed F Albeshr
- Department of Zoology, College of Sciences, King Saud University, P.O.Box.2455, Riyadh, 11451, Saudi Arabia
| | - Abdulwahed Fahad Alrefaei
- Department of Zoology, College of Sciences, King Saud University, P.O.Box.2455, Riyadh, 11451, Saudi Arabia
| | - L Arul Pragasan
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641 046, India
| | - Fuchun Zhang
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China.
| | - Xinghui Liu
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China.
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Li T, Li Y, Zhang X, Yuan J, Guo J, Wang P, Wei G, Chen C. Distinct response patterns of bacterial communities in Ag- and ZnO-rGO nanocomposite-amended silt loam soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:151270. [PMID: 34756902 DOI: 10.1016/j.scitotenv.2021.151270] [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: 08/09/2021] [Revised: 09/26/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
The widespread application of metal-based nanoparticle (MNPs)/reduced graphene oxide (rGO) composites inevitably leads to their release into soils. However, we lack a detailed understanding of the bacterial community response to MNPs-rGO exposure in farmland soils. Here, we conducted a soil microcosm experiment to analyze the potential impact of MNPs-rGO on bacterial communities in two field soils via high-throughput sequencing. The change in alpha diversity of bacterial communities was more susceptible to Ag-rGO and ZnO-rGO treatments than CuO-rGO. In both soils, MNPs-rGO significantly changed the bacterial community structure even at a low dose (1 mg kg-1). The bacterial community structure was most strongly affected by Ag-rGO at 30 days, but the greatest changes occurred in ZnO-rGO at 60 days. The differences in soil properties could shape bacterial communities to MNPs-rGO exposure. Distance-based redundancy analysis and functional annotation of prokaryotic taxa showed that some bacterial species associated with nitrogen cycling were greatly influenced by Ag-rGO and ZnO-rGO exposure. In sum, Ag-rGO and ZnO-rGO may potentially affect bacterial communities and nitrogen turnover under long-term realistic field exposure. These findings present a perspective on the response of bacterial communities to MNPs-rGO and provide a fundamental basis for estimating the ecological behavior of MNPs-rGO.
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Affiliation(s)
- Tao Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Yuhua Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Xike Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Jiawei Yuan
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Junkang Guo
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, PR China
| | - Pan Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Gehong Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
| | - Chun Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
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Coordination of thin-film nanofibrous composite dialysis membrane and reduced graphene oxide aerogel adsorbents for elimination of indoxyl sulfate. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.01.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Sivaselvam S, Selvakumar R, Viswanathan C, Ponpandian N. Rapid one-pot synthesis of PAM-GO-Ag nanocomposite hydrogel by gamma-ray irradiation for remediation of environment pollutants and pathogen inactivation. CHEMOSPHERE 2021; 275:130061. [PMID: 33677277 DOI: 10.1016/j.chemosphere.2021.130061] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/11/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
Designing a cost-effective, high potential and recyclable catalyst remains a challenge. In the present work, a monolithic PAM-GO-Ag hydrogel is prepared by a facile, eco-friendly method using gamma-ray irradiation. The formation of GO-Ag composite by gamma radiation is also investigated and it is authenticated by XRD, FTIR, Raman, XPS and TEM analysis. The PAM-GO-Ag hydrogel exhibits excellent catalytic activity to different catalysant like methylene blue, Rhodamine-B, and pharmaceutical compound ciprofloxacin. The high catalyst carrying capacity and rapid electron shuttling ability of GO plays a significant role in the high performance of PAM-GO-Ag hydrogel. The PAM-GO-Ag hydrogel also exhibits excellent antibacterial activity. The damaged cell membrane, protein leakage, and increased ROS level contribute to the antibacterial activity of PAM-GO-Ag. The monolithic structure of PAM-GO-Ag hydrogel makes it easy to handle, recover, and reuse for several runs without significant loss of catalytic and antibacterial activity. All these results showed the possible application of PAM-GO-Ag hydrogel as a promising catalyst for the reduction of different pollutants and antibacterial agents on a large scale with good reusability.
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Affiliation(s)
- S Sivaselvam
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641 046, India
| | - R Selvakumar
- Nanobiotechnology Laboratory, PSG Institute of Advanced Studies, Peelamedu, Coimbatore, 641 004, India
| | - C Viswanathan
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641 046, India
| | - N Ponpandian
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641 046, India.
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Kasturi S, Eom Y, Torati SR, Kim C. Highly sensitive electrochemical biosensor based on naturally reduced rGO/Au nanocomposite for the detection of miRNA-122 biomarker. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.09.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Microstructure evolution and texture tailoring of reduced graphene oxide reinforced Zn scaffold. Bioact Mater 2020; 6:1230-1241. [PMID: 33210021 PMCID: PMC7653236 DOI: 10.1016/j.bioactmat.2020.10.017] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/04/2020] [Accepted: 10/21/2020] [Indexed: 02/07/2023] Open
Abstract
Zinc (Zn) possesses desirable degradability and favorable biocompatibility, thus being recognized as a promising bone implant material. Nevertheless, the insufficient mechanical performance limits its further clinical application. In this study, reduced graphene oxide (RGO) was used as reinforcement in Zn scaffold fabricated via laser additive manufacturing. Results showed that the homogeneously dispersed RGO simultaneously enhanced the strength and ductility of Zn scaffold. On one hand, the enhanced strength was ascribed to (i) the grain refinement caused by the pinning effect of RGO, (ii) the efficient load shift due to the huge specific surface area of RGO and the favorable interface bonding between RGO and Zn matrix, and (iii) the Orowan strengthening by the homogeneously distributed RGO. On the other hand, the improved ductility was owing to the RGO-induced random orientation of grain with texture index reducing from 20.5 to 7.3, which activated more slip systems and provided more space to accommodate dislocation. Furthermore, the cell test confirmed that RGO promoted cell growth and differentiation. This study demonstrated the great potential of RGO in tailoring the mechanical performance and cell behavior of Zn scaffold for bone repair. Zn/RGO composite scaffold was successfully fabricated by laser additive manufacturing. RGO refined the grains and significantly weakened the texture with random grain orientation. The uniformly distributed RGO simultaneously enhanced the strength and ductility of scaffold. The incorporated RGO exerted a positive effect on cell growth and differentiation.
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Lozovskis P, Jankauskaitė V, Guobienė A, Kareivienė V, Vitkauskienė A. Effect of Graphene Oxide and Silver Nanoparticles Hybrid Composite on P. aeruginosa Strains with Acquired Resistance Genes. Int J Nanomedicine 2020; 15:5147-5163. [PMID: 32764942 PMCID: PMC7381769 DOI: 10.2147/ijn.s235748] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 05/28/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND In the last decades, nosocomial infections caused by drug-resistant Pseudomonas aeruginosa became a common problem in healthcare facilities. Antibiotics are becoming less effective as new resistant strains appear. Therefore, the development of novel enhanced activity antibacterial agents becomes very significant. A combination of nanomaterials with different physical and chemical properties enables us to generate novel multi-functional derivatives. In this study, graphene oxide and polyvinylpyrrolidone-stabilized silver nanoparticles hybrid nanocomposite (GO-Ag HN) were synthesized. The relation between antibiotic resistance and GO-Ag HN potential toxicity to clinical P. aeruginosa strains, their antibiotic resistance, and molecular mechanisms were assessed. METHODS Chemical state, particle size distribution, and morphology of synthesized GO-Ag NH were investigated using spectroscopy and microscopy techniques (UV-Vis, FTIR, XPS, TEM, SEM, AFM). Broad-spectrum antibiotic resistance of P. aeruginosa strains was determined using E-test. Antibiotic resistance genes were identified using polymerase chain reaction (PCR). RESULTS In this study, the toxicity of the GO-Ag NH to the isolated clinical P. aeruginosa strains has been investigated. A high antibiotic resistance level (92%) was found among P. aeruginosa strains. The most prevalent antibiotic resistance gene among tested strains was the AMPC beta-lactamase gene (65.6%). UV-vis, FTIR, and XPS studies confirmed the formation of the silver nanoparticles on the GO nanosheets. The functionalization process occurred through the interaction between Ag nanoparticles, GO, and polyvinylpyrrolidone used for nanoparticle stabilization. SEM analysis revealed that GO nanosheets undergo partial fragmentation during hybrid nanocomposite preparation, which remarkably increases the number of sharp edges and their mediated cutting effect. TEM analysis showed that GO-Ag HN spherical Ag nanoparticles mainly 9-12 nm in size were irregularly precipitated on the GO nanosheet surface. A higher density of Ag NPs was observed in the sheets' wrinkles, corrugations, and sharp edges. This hybrid nanocomposite poses enhanced antibacterial activity against carbapenem-resistant P. aeruginosa strains through a possible synergy between toxicity mechanisms of GO nanosheets and Ag nanoparticles. With incubation time increasing up to 10 minutes, the survival of P. aeruginosa decreased significantly. CONCLUSION A graphene oxide and silver nanoparticles hybrid composite has been shown to be a promising material to control nosocomial infections caused by bacteria strains resistant to most antibiotics.
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Affiliation(s)
- Povilas Lozovskis
- Faculty of Medicine, Lithuanian University of Health Science, Kaunas, Lithuania
| | - Virginija Jankauskaitė
- Department of Production Engineering, Kaunas University of Technology, Kaunas, Lithuania
| | - Asta Guobienė
- Institute of Materials Science, Kaunas University of Technology, Kaunas, Lithuania
| | - Violeta Kareivienė
- Faculty of Medicine, Lithuanian University of Health Science, Kaunas, Lithuania
| | - Astra Vitkauskienė
- Faculty of Medicine, Lithuanian University of Health Science, Kaunas, Lithuania
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Ikram M, Raza A, Imran M, Ul-Hamid A, Shahbaz A, Ali S. Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment. NANOSCALE RESEARCH LETTERS 2020; 15:95. [PMID: 32346803 PMCID: PMC7188753 DOI: 10.1186/s11671-020-03323-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/13/2020] [Indexed: 05/21/2023]
Abstract
Graphene oxide (GO) was obtained through modified hummers method, and reduced graphene oxide (rGO) was acquired by employing heat treatment. Various concentrations (2.5, 5, 7.5, and 10 wt. %) of silver (Ag) were incorporated in GO nanosheets by adopting hydrothermal approach. Synthesized Ag decorated rGO photocatalyst Ag/rGO was characterized using X-ray diffraction (XRD) to determine phase purity and crystal structure. XRD patterns showed the formation of GO to Ag/rGO. Molecular vibration and functional groups were determined through Fourier Transform Infrared spectroscopy (FTIR). Optical properties and a decrease in bandgap with insertion of Ag were confirmed with UV-Visible (Uv-Vis) spectrophotometer and photoluminescence (PL). Electronic properties and disorders in carbon structures were investigated through Raman spectroscopy that revealed the existence of characteristic bands (D and G). Surface morphology of prepared samples was examined with field emission scanning electron microscope (FESEM). Homogeneous distribution, size, and spherical shape of Ag NPs over rGO sheets were further confirmed with the help of high-resolution transmission electron microscope (HR-TEM). Dye degradation of doped and undoped samples was examined through Uv-Vis spectra. Experimental results indicated that photocatalytic activity of Ag@rGO enhanced with increased doping ratio owing to diminished electron-hole pair recombination. Therefore, it is suggested that Ag@rGO can be used as a beneficial and superior photocatalyst to clean environment and wastewater.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, Punjab 54000 Pakistan
| | - Ali Raza
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Muhammad Imran
- State key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Anwar Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, 31261 Saudi Arabia
| | - Atif Shahbaz
- Department of Physics, Government College University Lahore, Lahore, Punjab 54000 Pakistan
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
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Ross N, Civilized Nqakala N. Electrochemical Determination of Hydrogen Peroxide by a Nonenzymatic Catalytically Enhanced Silver-Iron (III) Oxide/Polyoxometalate/Reduced Graphene Oxide Modified Glassy Carbon Electrode. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1745223] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Natasha Ross
- SensorLab, Department of Chemistry, University of Western Cape, Bellville, Cape Town, South Africa
| | - Noniko Civilized Nqakala
- SensorLab, Department of Chemistry, University of Western Cape, Bellville, Cape Town, South Africa
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Kasturi S, Torati SR, Eom YJ, Ahmad S, Lee BJ, Yu JS, Kim C. Real-time monitored photocatalytic activity and electrochemical performance of an rGO/Pt nanocomposite synthesized via a green approach. RSC Adv 2020; 10:13722-13731. [PMID: 35492974 PMCID: PMC9051565 DOI: 10.1039/d0ra00541j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 03/06/2020] [Indexed: 01/14/2023] Open
Abstract
Herein, we have reported the real-time photodegradation of methylene blue (MB), an organic pollutant, in the presence of sunlight at an ambient temperature using a platinum-decorated reduced graphene oxide (rGO/Pt) nanocomposite. The photocatalyst was prepared via a simple, one-pot and green approach with the simultaneous reduction of GO and Pt using aqueous honey as a reducing agent. Moreover, the honey not only simultaneously reduced Pt ions and GO but also played a key role in the growth and dispersion of Pt nanoparticles on the surface of rGO. Various rGO/Pt nanocomposites with different percentages of Pt nanoparticles loaded on rGO were obtained by tuning the concentration of the Pt source. The high percentage of Pt nanoparticles with an average size of 2.5 nm dispersed on rGO has shown excellent electrochemical performance. The photocatalytic activity of the rGO/Pt composite was enhanced by increasing the weight percent of the Pt particles on rGO, which led to the formation of a highly efficient photocatalyst. The optimized photocatalyst exhibited remarkable photocatalytic activity and degraded 98% MB in 180 minutes; thus, it can be used for industrial and environmental applications.
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Affiliation(s)
- Satish Kasturi
- Department of Emerging Materials Science, DGIST Daegu-42988 Republic of Korea +82-53-785-6509 +82-53-785-6516
| | - Sri Ramulu Torati
- Department of Emerging Materials Science, DGIST Daegu-42988 Republic of Korea +82-53-785-6509 +82-53-785-6516
| | - Yun Ji Eom
- Department of Emerging Materials Science, DGIST Daegu-42988 Republic of Korea +82-53-785-6509 +82-53-785-6516
| | - Syafiq Ahmad
- Department of Emerging Materials Science, DGIST Daegu-42988 Republic of Korea +82-53-785-6509 +82-53-785-6516
| | - Byong-June Lee
- Department of Energy Science and Engineering, DGIST Daegu-42988 Republic of Korea
| | - Jong-Sung Yu
- Department of Energy Science and Engineering, DGIST Daegu-42988 Republic of Korea
| | - CheolGi Kim
- Department of Emerging Materials Science, DGIST Daegu-42988 Republic of Korea +82-53-785-6509 +82-53-785-6516
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Mali SM, Narwade SS, Navale YH, Tayade SB, Digraskar RV, Patil VB, Kumbhar AS, Sathe BR. Heterostructural CuO-ZnO Nanocomposites: A Highly Selective Chemical and Electrochemical NO 2 Sensor. ACS OMEGA 2019; 4:20129-20141. [PMID: 31815213 PMCID: PMC6893959 DOI: 10.1021/acsomega.9b01382] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 10/02/2019] [Indexed: 05/24/2023]
Abstract
A simple one-step chemical method is employed for the successful synthesis of CuO(50%)-ZnO(50%) nanocomposites (NCs) and investigation of their gas sensing properties. The X-ray diffraction studies revealed that these CuO-ZnO NCs display a hexagonal wurtzite-type crystal structure. The average width of 50-100 nm and length of 200-600 nm of the NCs were confirmed by transmission electron microscopic images, and the 1:1 proportion of Cu and Zn composition was confirmed by energy-dispersive spectra, i.e., CuO(50%)-ZnO(50%) NC studies. The CuO(50%)-ZnO(50%) NCs exhibit superior gas sensing performance with outstanding selectivity toward NO2 gas at a working temperature of 200 °C. Moreover, these NCs were used for the indirect evaluation of NO2 via electrochemical detection of NO2 - (as NO2 converts into NO2 - once it reacts with moisture, resulting into acid rain, i.e., indirect evaluation of NO2). As compared with other known modified electrodes, CuO(50%)-ZnO(50%) NCs show an apparent oxidation of NO2 - with a larger peak current for a wider linear range of nitrite concentration from 20 to 100 mM. We thus demonstrate that the as-synthesized CuO(50%)-ZnO(50%) NCs act as a promising low-cost NO2 sensor and further confirm their potential toward tunable gas sensors (electrochemical and solid state) (Scheme 1).
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Affiliation(s)
- Shivsharan M. Mali
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MH, India
| | - Shankar S. Narwade
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MH, India
| | - Yuvraj H. Navale
- Functional
Materials Research Laboratory, School of Physical Sciences, Solapur University, Solapur 413255, MH, India
| | - Sakharam B. Tayade
- Department of Chemistry, Savitribai Phule Pune University, Pune 411007, MH, India
| | - Renuka V. Digraskar
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MH, India
| | - Vikas B. Patil
- Functional
Materials Research Laboratory, School of Physical Sciences, Solapur University, Solapur 413255, MH, India
| | - Avinash S. Kumbhar
- Department of Chemistry, Savitribai Phule Pune University, Pune 411007, MH, India
| | - Bhaskar R. Sathe
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MH, India
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Hariram M, Vivekanandhan S, Ganesan V, Muthuramkumar S, Rodriguez-uribe A, Mohanty A, Misra M. Tecoma stans flower extract assisted biogenic synthesis of functional Ag-Talc nanostructures for antimicrobial applications. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100298] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jones TR, Hernandez-Aldave S, Kaspar RB, Letterio MP, Yan Y, Bertoncello P. Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Plant-Mediated Green Synthesis of Nanostructures: Mechanisms, Characterization, and Applications. INTERFACE SCIENCE AND TECHNOLOGY 2019. [DOI: 10.1016/b978-0-12-813586-0.00006-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Hariram M, Vivekanandhan S. Phytochemical Process for the Functionalization of Materials with Metal Nanoparticles: Current Trends and Future Perspectives. ChemistrySelect 2018. [DOI: 10.1002/slct.201802748] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Muruganandham Hariram
- Sustainable Materials and Nanotechnology Lab (SMNL); Department of Physics, V.H.N.S.N. College, Virudhunagar-; 626 001, Tamil Nadu India
- Department of Physics; Bharathidasan University; Tiruchirappalli-620 024, Tamil Nadu India
| | - Singaravelu Vivekanandhan
- Sustainable Materials and Nanotechnology Lab (SMNL); Department of Physics, V.H.N.S.N. College, Virudhunagar-; 626 001, Tamil Nadu India
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Mukheem A, Muthoosamy K, Manickam S, Sudesh K, Shahabuddin S, Saidur R, Akbar N, Sridewi N. Fabrication and Characterization of an Electrospun PHA/Graphene Silver Nanocomposite Scaffold for Antibacterial Applications. MATERIALS 2018; 11:ma11091673. [PMID: 30201852 PMCID: PMC6163631 DOI: 10.3390/ma11091673] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 08/21/2018] [Accepted: 08/23/2018] [Indexed: 11/16/2022]
Abstract
Many wounds are unresponsive to currently available treatment techniques and therefore there is an immense need to explore suitable materials, including biomaterials, which could be considered as the crucial factor to accelerate the healing cascade. In this study, we fabricated polyhydroxyalkanoate-based antibacterial mats via an electrospinning technique. One-pot green synthesized graphene-decorated silver nanoparticles (GAg) were incorporated into the fibres of poly-3 hydroxybutarate-co-12 mol.% hydroxyhexanoate (P3HB-co-12 mol.% HHx), a co-polymer of the polyhydroxyalkanoate (PHA) family which is highly biocompatible, biodegradable, and flexible in nature. The synthesized PHA/GAg biomaterial has been characterized by field emission scanning electron microscopy (FESEM), elemental mapping, thermogravimetric analysis (TGA), UV-visible spectroscopy (UV-vis), and Fourier transform infrared spectroscopy (FTIR). An in vitro antibacterial analysis was performed to investigate the efficacy of PHA/GAg against gram-positive Staphylococcus aureus (S. aureus) strain 12,600 ATCC and gram-negative Escherichia coli (E. coli) strain 8739 ATCC. The results indicated that the PHA/GAg demonstrated significant reduction of S. aureus and E. coli as compared to bare PHA or PHA- reduced graphene oxide (rGO) in 2 h of time. The p value (p < 0.05) was obtained by using a two-sample t-test distribution.
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Affiliation(s)
- Abdul Mukheem
- Department of Maritime Science and Technology Faculty of Science and Defence Technology, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia.
| | - Kasturi Muthoosamy
- Department of Chemical and Nano pharmaceutical Process Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Semenyih 43500, Malaysia.
| | - Sivakumar Manickam
- Department of Chemical and Nano pharmaceutical Process Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Semenyih 43500, Malaysia.
| | - Kumar Sudesh
- Applied Microbiology and Ecobiomaterial Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia.
| | - Syed Shahabuddin
- Research Centre for Nano-Materials and Energy Technology (RCNMET), School of Science and Technology, Sunway University, Subang Jaya 47500, Malaysia.
| | - Rahman Saidur
- Research Centre for Nano-Materials and Energy Technology (RCNMET), School of Science and Technology, Sunway University, Subang Jaya 47500, Malaysia.
- School of Postgraduate Studies and Research, American University of Ras Al Khaimah, Ras Al Khaimah 31208, UAE.
| | - Noor Akbar
- Department of Biological Sciences, School of Science and Technology, Sunway University, Subang Jaya 47500, Malaysia.
| | - Nanthini Sridewi
- Department of Maritime Science and Technology Faculty of Science and Defence Technology, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia.
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18
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He K, Zeng Z, Chen A, Zeng G, Xiao R, Xu P, Huang Z, Shi J, Hu L, Chen G. Advancement of Ag-Graphene Based Nanocomposites: An Overview of Synthesis and Its Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800871. [PMID: 29952105 DOI: 10.1002/smll.201800871] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/07/2018] [Indexed: 06/08/2023]
Abstract
Graphene has been employed as an excellent support for metal nanomaterials because of its unique structural and physicochemical properties. Silver nanoparticles (AgNPs) with exceptional properties have received considerable attention in various fields; however, particle aggregation limits its application. Therefore, the combination of AgNPs and graphene based nanocomposites (Ag-graphene based nanocomposites) has been widely explored to improve their properties and applications. Excitingly, enhanced antimicrobial, catalytic, and surface enhanced Raman scattering properties are obtained after their combination. In order to have a comprehensive knowledge of these nanocomposites, this Review highlights the chemical and biological synthesis of Ag-graphene nanocomposites. In particular, their applications as antimicrobial agents, catalysts, and sensors in biomedicine, agricultural protection, and environmental remediation and detection are covered. Meanwhile, the factors that influence the synthesis and applications are also briefly discussed. Furthermore, several important issues on the challenges and new directions are also provided for further development of these nanocomposites.
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Affiliation(s)
- Kai He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Zhuotong Zeng
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, 410011, P. R. China
| | - Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, P. R. China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Rong Xiao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, 410011, P. R. China
| | - Piao Xu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Zhenzhen Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Jiangbo Shi
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Liang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
| | - Guiqiu Chen
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Changsha, 410082, P. R. China
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19
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Alsultan M, Choi J, Jalili R, Wagner P, Swiegers GF. Synergistic amplification of catalytic hydrogen generation by a thin-film conducting polymer composite. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00780b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The presence of PEDOT in a thin-film containing nano-Ni and rGO amplifies catalytic hydrogen generation to exceed that by Pt.
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Affiliation(s)
- Mohammed Alsultan
- Department of Science
- University of Mosul
- Mosul
- Iraq
- Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science
| | | | | | - Pawel Wagner
- Department of Science
- University of Mosul
- Mosul
- Iraq
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20
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Mali S, Chavan PP, Navale YH, Patil VB, Sathe BR. Ultrasensitive and bifunctional ZnO nanoplates for an oxidative electrochemical and chemical sensor of NO2: implications towards environmental monitoring of the nitrite reaction. RSC Adv 2018; 8:11177-11185. [PMID: 35541530 PMCID: PMC9079129 DOI: 10.1039/c8ra01358f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 03/12/2018] [Indexed: 11/21/2022] Open
Abstract
Herein, we focused on the one pot synthesis of ZnO nanoplates (NP edge thickness of ∼100 nm) using a chemical emulsion approach for chemical (direct) and electrochemical (indirect) determination of NO2.
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Affiliation(s)
- Shivsharan M. Mali
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University
- Aurangabad
- India
| | - Parag P. Chavan
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University
- Aurangabad
- India
| | - Yuvraj H. Navale
- Functional Materials Research Laboratory
- School of Physical Sciences
- Solapur University
- Solapur
- India
| | - Vikas B. Patil
- Functional Materials Research Laboratory
- School of Physical Sciences
- Solapur University
- Solapur
- India
| | - Bhaskar R. Sathe
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University
- Aurangabad
- India
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