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Simon SM, V.P. P, M.S. S, Chandran A, George G, Barmiah EK, Jose G, P.R. B, Joseph C, N.V. U. Development and characterizations of Ag nanoparticles decorated TiO2-ZrO2 coatings as electrode material for supercapacitors. RESULTS IN SURFACES AND INTERFACES 2023. [DOI: 10.1016/j.rsurfi.2023.100098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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2
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Trusova EA, Titov DD, Afzal AM, Abramchuk SS. Influence of Graphene Sheets on Compaction and Sintering Properties of Nano-Zirconia Ceramics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7342. [PMID: 36295413 PMCID: PMC9611474 DOI: 10.3390/ma15207342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/30/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
The use of a nanostructured graphene-zirconia composite will allow the development of new materials with improved performance properties and a high functionality. This work covers a stepwise study related to the creation of a nanostructured composite based on ZrO2 and graphene. A composite was prepared using two suspensions: nano-zirconia obtained by sol-gel synthesis and oxygen-free graphene obtained sonochemically. The morphology of oxygen-free graphene sheets, phase composition and the morphology of a zirconia powder, and the morphology of the synthesized composite were studied. The effect of the graphene sheets on the rheological and sintering properties of a nanostructured zirconia-based composite powder has been studied. It has been found that graphene sheets in a hybrid nanostructure make it difficult to press at the elastic deformation stage, and the composite passes into the plastic region at a lower pressure than a single nano-zirconia. A sintering mechanism was proposed for a composite with a graphene content of 0.635 wt%, in which graphene is an important factor affecting the process mechanism. It has been determined that the activation energy of the composite sintering is more than two times higher than for a single nano-zirconia. Apparently, due to the van der Waals interaction, the graphene sheets partially stabilize the zirconia and prevent the disordering of the surface monolayers of its nanocrystals and premelting prior to the sintering. This leads to an increase in the activation energy of the composite sintering, and its sintering occurs, according to a mixed mechanism, in which the grain boundary diffusion predominates, in contrast to the single nano-zirconia sintering, which occurs through a viscous flow.
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Affiliation(s)
- Elena A. Trusova
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49 Leninsky pr., 119334 Moscow, Russia
| | - Dmitrii D. Titov
- Ceramic Materials Engineering, University of Bayreuth, Ludwig-Thima-Ste. 36b, 95447 Bayreuth, Germany
| | - Asya M. Afzal
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49 Leninsky pr., 119334 Moscow, Russia
| | - Sergey S. Abramchuk
- Faculty of chemistry, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russia
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3
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Kumar A, Kumar N. Advances in transparent polymer nanocomposites and their applications: A comprehensive review. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2022.2029892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Atish Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
| | - Narendra Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
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Majumder P, Gangopadhyay R. Evolution of graphene oxide (GO)-based nanohybrid materials with diverse compositions: an overview. RSC Adv 2022; 12:5686-5719. [PMID: 35425552 PMCID: PMC8981679 DOI: 10.1039/d1ra06731a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/30/2021] [Indexed: 01/09/2023] Open
Abstract
The discovery of the 2D nanostructure of graphene was in fact the beginning of a new generation of materials. Graphene itself, its oxidized form graphene oxide (GO), the reduced form of GO (RGO) and their numerous composites are associates of this generation. Out of this spectrum of materials, the development of GO and related hybrid materials has been reviewed in the present article. GO can be functionalized with metals (Ag and Mg) and metal oxides (CuO, MgO, Fe2O3, Ag2O, etc.) nanoparticles (NPs), organic ligands (chitosan and EDTA) and can also be dispersed in different polymeric matrices (PVA, PMMA, PPy, and PAn). All these combinations give rise to nanohybrid materials with improved functionality. An updated report on the chronological development of such nanohybrid materials of diverse nature has been delivered in the present context. Modifications in synthesis methodologies as well as performances and applications of individual materials are addressed accordingly. The functional properties of GO were synergistically modified by photoactive semiconductor NPs; as a result, the GO–MO hybrids acquired excellent photocatalytic ability and were able to degrade a large variety of organic dyes (MB, RhB, MO, MR, etc.) and pathogens. The large surface area of GO was successfully complemented by the NPs so that high and selective adsorption capacity towards metal ions and organic molecules as well as improved charge separation properties could be achieved. As a result, GO–MO hybrids have been considered effective materials in water purification, energy storage and antibacterial applications. GO–MO hybrids with magnetic particles have exhibited selective destruction of cancerous cells and controlled drug release properties, extremely important in the pharmaceutical field. Chitosan and EDTA-modified GO could form 3D network-like structures with strong efficiency in removing heavy metal ions and organic pollutants. GO as a filler enhanced the strength, flexibility and functional properties of common polymers, such as PVA and PVC, to a large extent while, GO–CP composites with polyaniline and polypyrrole are considered suitable for the fabrication of biosensors, supercapacitors, and MEMS as well as efficient photothermal therapy agents. In summary, GO-based hybrids with inorganic and organic counterparts have been designed, the unique properties of which are exploited in versatile fields of applications. GO undergoes synergistic interaction with MO nanoparticles and the hybrid can be used as a heterogeneous catalyst for the photocatalytic degradation of dyes.![]()
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Affiliation(s)
- Pampi Majumder
- A/515, H. B. Town, Purbayan, Sodepur, Kolkata 700110, West Bengal, India
| | - Rupali Gangopadhyay
- Department of Chemistry, Sister Nivedita University, Action Area I, DG Block, 1/2, New Town, Kolkata, 700156, West Bengal, India
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Srinivasan S, Vivek C, Sakthivel P, Chamundeeswari G, Prasanna Bharathi S, Amuthameena S, Balraj B. Synthesis of Ag incorporated ZrO2 nanomaterials for enhanced electrochemical energy storage applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Rathee G, Bartwal G, Rathee J, Mishra YK, Kaushik A, Solanki PR. Emerging Multimodel Zirconia Nanosystems for High‐Performance Biomedical Applications. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202100039] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Garima Rathee
- Special Centre for Nano science Jawaharlal Nehru University New Delhi India
| | - Gaurav Bartwal
- Hemwati Nandan Bahuguna Garhwal University Birla Campus, Pauri Garhwal Srinagar Uttarakhand 246174 India
| | - Jyotsna Rathee
- CSE Department Deenbandhu Chhoturam University of Science and Technology Murthal Haryana 131039 India
| | - Yogendra Kumar Mishra
- Mads Clausen Institute NanoSYD University of Southern Denmark Alison 2 6400 Sønderborg Denmark
| | - Ajeet Kaushik
- NanoBioTech Laboratory Department of Natural Sciences, Division of Sciences, Art, and Mathematics Florida Polytechnic University Lakeland FL 33805 USA
| | - Pratima R. Solanki
- Special Centre for Nano science Jawaharlal Nehru University New Delhi India
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Haldar P. Achieving wide potential window and high capacitance for supercapacitors using different metal oxides (viz.: ZrO2, WO3 and V2O5) and their PANI/graphene composites with Na2SO4 electrolyte. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138221] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Hydrothermal implement with supporting of semiconductor ZrO2 (ZO), Ag doped ZrO2 (AZO) nanomaterial and its astrophysical, UV photocatalytic employment on Rh6G dye. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01453-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lazauskas A, Marcinauskas L, Andrulevicius M. Modification of Graphene Oxide/V 2O 5· nH 2O Nanocomposite Films via Direct Laser Irradiation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:18877-18884. [PMID: 32250584 PMCID: PMC7467550 DOI: 10.1021/acsami.0c02066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Herein, photothermal modification of nanocomposite films consisting of hydrated vanadium pentoxide (V2O5·nH2O) nanoribbons wrapped with graphene oxide (GO) flakes was performed via 405 nm direct laser irradiation. The combination of X-ray diffraction, X-ray photoelectron spectroscopy, Raman scattering, transmission electron microscopy, and scanning electron microscopy allowed comprehensive characterization of physical and chemical changes of GO/V2O5·nH2O nanocomposite films upon photothermal modification. The modified nanocomposite films exhibited porous surface morphology (17.27 m2 g-1) consisting of randomly distributed pillarlike protrusions. The photothermal modification process of GO/V2O5·nH2O enhanced the electrical conductivity of nanocomposite from 1.6 to 6.8 S/m. It was also determined that the direct laser irradiation of GO/V2O5·nH2O resulted in considerable decrease of C-O bounds as well as O-H functional groups with an increase of the laser power density.
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Affiliation(s)
- Algirdas Lazauskas
- Plasma
Processing Laboratory, Lithuanian Energy
Institute, Breslaujos 3, LT44403 Kaunas, Lithuania
- Institute
of Materials Science, Kaunas University
of Technology, K. Baršausko
59, LT51423 Kaunas, Lithuania
| | - Liutauras Marcinauskas
- Plasma
Processing Laboratory, Lithuanian Energy
Institute, Breslaujos 3, LT44403 Kaunas, Lithuania
- Department
of Physics, Kaunas University of Technology, Studentų 50, LT-51368 Kaunas, Lithuania
| | - Mindaugas Andrulevicius
- Institute
of Materials Science, Kaunas University
of Technology, K. Baršausko
59, LT51423 Kaunas, Lithuania
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Trusova EA, Titov DD, Kirichenko AN, Shelekhov EV, Trutnev NS, Afzal AM, Perezhogin IA. The phase composition, morphology and compressibility of graphene-zirconia composite nanostructured powder. NANOSCALE ADVANCES 2020; 2:182-189. [PMID: 36134010 PMCID: PMC9417050 DOI: 10.1039/c9na00624a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 11/24/2019] [Indexed: 06/16/2023]
Abstract
Nanostructured composite particles of nano- and submicron sizes were synthesized by a combination of sol-gel and sonochemical techniques. Their graphene content was 0.8-0.9 wt%. These layered particles consisted of graphene sheets in which zirconia nanocrystals were discretely incorporated. The synthesized powders were characterized using XRD, TEM, HRTEM, diffusion aerosol spectrometry and elemental analysis. A comparison of the compressibility modulus, limit values of linear section deformation and compressibility factor shows that the compressibility of the composite is difficult to achieve compared to that of pure zirconia, apparently, due to the low elasticity of graphene sheets.
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Affiliation(s)
- E A Trusova
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
| | - D D Titov
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
| | - A N Kirichenko
- Technological Institute for Superhard and Novel Carbon Materials 7a Tsentralnaya street, Troitsk Moscow 142190 Russia
| | - E V Shelekhov
- National University of Science and Technology (MISiS) 4 Leninskiy pr. Moscow 119049 Russia
| | - N S Trutnev
- Moscow Polytechnic University 38 Bol'shaya Semenovskaya street Moscow 107023 Russia
| | - A M Afzal
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
- Peoples' Friendship University of Russia 6 Miklukho-Maklaya str. Moscow 117198 Russia
| | - I A Perezhogin
- Technological Institute for Superhard and Novel Carbon Materials 7a Tsentralnaya street, Troitsk Moscow 142190 Russia
- Lomonosov Moscow State University Leninskie Gory Moscow 119991 Russia
- Moscow Institute of Physics and Technology State University 9 Institutskiy Per., Dolgoprudny Moscow Region 141700 Russia
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11
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Enhanced photocatalytic and antibacterial activities of RGO/LiFe5O8 nanocomposites. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.112063] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Reddy CV, Reddy IN, Reddy KR, Jaesool S, Yoo K. Template-free synthesis of tetragonal Co-doped ZrO2 nanoparticles for applications in electrochemical energy storage and water treatment. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.010] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Shaik MR, Alam M, Adil SF, Kuniyil M, Al-Warthan A, Siddiqui MRH, Tahir MN, Labis JP, Khan M. Solvothermal Preparation and Electrochemical Characterization of Cubic ZrO₂ Nanoparticles/Highly Reduced Graphene (HRG) based Nanocomposites. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E711. [PMID: 30823461 PMCID: PMC6427155 DOI: 10.3390/ma12050711] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/20/2019] [Accepted: 02/22/2019] [Indexed: 11/16/2022]
Abstract
A single-step solvothermal approach to prepare stabilized cubic zirconia (ZrO₂) nanoparticles (NPs) and highly reduced graphene oxide (HRG) and ZrO₂ nanocomposite (HRG@ZrO₂) using benzyl alcohol as a solvent and stabilizing ligand is presented. The as-prepared ZrO₂ NPs and the HRG@ZrO₂ nanocomposite were characterized using transmission electron microscopy (TEM) and X-ray diffraction (XRD), which confirmed the formation of ultra-small, cubic phase ZrO₂ NPs with particle sizes of ~2 nm in both reactions. Slight variation of reaction conditions, including temperature and amount of benzyl alcohol, significantly affected the size of resulting NPs. The presence of benzyl alcohol as a stabilizing agent on the surface of ZrO₂ NPs was confirmed using various techniques such as ultraviolet-visible (UV-vis), Fourier-transform infrared (FT-IR), Raman and XPS spectroscopies and thermogravimetric analysis (TGA). Furthermore, a comparative electrochemical study of both as-prepared ZrO₂ NPs and the HRG@ZrO₂ nanocomposites is reported. The HRG@ZrO₂ nanocomposite confirms electronic interactions between ZrO₂ and HRG when compared their electrochemical studies with pure ZrO₂ and HRG using cyclic voltammetry (CV).
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Affiliation(s)
- Mohammed Rafi Shaik
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Manawwer Alam
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Syed Farooq Adil
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Mufsir Kuniyil
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Abdulrahman Al-Warthan
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Mohammed Rafiq H Siddiqui
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
| | - Muhammad Nawaz Tahir
- Chemistry Department, King Fahd University of Petroleum and Materials, Dhahran 31261, Saudi Arabia.
| | - Joselito P Labis
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Mujeeb Khan
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.
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14
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Elucidation of an intrinsic parameter for evaluating the electrical quality of graphene flakes. Sci Rep 2019; 9:557. [PMID: 30679626 PMCID: PMC6346114 DOI: 10.1038/s41598-018-37010-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/30/2018] [Indexed: 11/08/2022] Open
Abstract
A test method for evaluating the quality of graphene flakes, such as reduced graphene oxide (rGO) and graphene nanopowder (GNP), was developed in this study. The pelletizer was selected for a sampling tool, which enables us to formulate the flake sample as a measurable sample. Various parameters were measured from the pelletized sample in order to elucidate the best parameter for representing the quality of the graphene flakes in terms of their electrical properties. Based on the analysis of 4-probe measurement data on the pelletized sample, the best intrinsic parameter is volume resistivity (or volume conductivity) rather than resistivity (or conductivity). Additionally, the possible modification of a sample before and after the pressurization was investigated by electron microscopy and Raman spectroscopy. No significant modification was observed. The volume conductivity in the two types of the graphene was different from their individual conductivities by one order of magnitude. Based on the results of X-ray photoelectron spectroscopy and Raman spectroscopy measurements, the volume conductivity of the graphene flake samples was governed by the oxygen content in the sample. Our achievements will promote the effective use of powder-type graphene products for further applications.
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15
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Graphene oxide-based zirconium oxide nanocomposite for enhanced visible light-driven photocatalytic activity. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-018-3699-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Hong SB, Jeong JM, Kang HG, Seo D, Cha Y, Jeon H, Lee GY, Irshad M, Kim DH, Hwang SY, Kim JW, Choi BG. Fast and Scalable Hydrodynamic Synthesis of MnO 2/Defect-Free Graphene Nanocomposites with High Rate Capability and Long Cycle Life. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35250-35259. [PMID: 30289681 DOI: 10.1021/acsami.8b12894] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The integration of metal oxides and carbon materials provides a great potential for enhancing the high energy and power densities of supercapacitors, but the rational design and scalable fabrication of such composite materials still remain a challenge. Herein, we report a fast, scalable, and one-pot hydrodynamic synthesis for preparing ion conductive and defect-free graphene from graphite and MnO2/graphene nanocomposites. The use of this hydrodynamic method using Taylor-Couette flow allows us to efficiently fast shear-exfoliate graphite into large quantities of high-quality graphene sheets. Deposition of MnO2 on graphene is subsequently performed in a fluidic reactor within 10 min. The prepared MnO2/graphene nanocomposite shows outstanding electrochemical performances, such as a high specific capacitance of 679 F/g at 25 mV/s, a high rate capability of 74.7% retention at an extremely high rate of 1000 mV/s, and an excellent cycling characteristic (∼94.7% retention over 20 000 cycles). An asymmetric supercapacitor device is fabricated by assembling an anode of graphene and a cathode of MnO2/graphene, which resulted in high energy (35.2 W h/kg) and power (7.4 kW/kg) densities (accounting for the mass of both electrodes and the electrolyte) with a high rate capability and long cycle life.
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Affiliation(s)
- Seok Bok Hong
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
| | - Jae-Min Jeong
- Department of Chemical & Biomolecular Engineering , KAIST , 291 Daehak-ro , Yuseong-gu, Daejeon 34141 , Republic of Korea
| | - Heon Gyu Kang
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
| | - Donghyuk Seo
- Department of Chemical & Biomolecular Engineering , KAIST , 291 Daehak-ro , Yuseong-gu, Daejeon 34141 , Republic of Korea
| | - Younghyun Cha
- Department of Chemical & Biomolecular Engineering , KAIST , 291 Daehak-ro , Yuseong-gu, Daejeon 34141 , Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
| | - Geun Young Lee
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
| | - Mobina Irshad
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
| | - Do Hyun Kim
- Department of Chemical & Biomolecular Engineering , KAIST , 291 Daehak-ro , Yuseong-gu, Daejeon 34141 , Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
- Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , Daejeon 34113 , Republic of Korea
| | - Jung Won Kim
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
| | - Bong Gill Choi
- Department of Chemical Engineering , Kangwon National University , 346 Joongang-ro , Samcheok , Gangwon-do 25913 , Republic of Korea
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Bhargava R, Khan S. Enhanced optical properties of Cu 2O anchored on reduced graphene oxide (rGO) sheets. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:335703. [PMID: 29995640 DOI: 10.1088/1361-648x/aad2b2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this report, Cu2O and Cu2O/rGO nanocomposites were successfully synthesized through chemical reduction method using glucose as a reducing agent for GO. The x-ray diffraction and field emission scanning electron microscope was used to investigate the phase composition and microstructure of the as-prepared materials. The presence of different functional groups in the as-synthesized sample was analyzed by Fourier transform infrared spectroscopy. Raman spectroscopy was used to confirm structural aspects such as defects of synthesized Cu2O/rGO nanocomposites. The optical properties of the as-prepared samples were analyzed by UV-vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. Urbach energy is calculated in order to find out the defects in the nanocomposites. Zeta potential analysis was done to study the surface charge and stability of the as-synthesized samples. These results show that the content of rGO introduced into nanocomposite improves the optical properties of Cu2O thereby enhancing the utilization of visible light.
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Affiliation(s)
- Richa Bhargava
- Department of Applied Physics, Z.H College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India
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Kandasamy SK, Kandasamy K. Recent Advances in Electrochemical Performances of Graphene Composite (Graphene-Polyaniline/Polypyrrole/Activated Carbon/Carbon Nanotube) Electrode Materials for Supercapacitor: A Review. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0779-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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19
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Bactericidal effect of graphene oxide/Cu/Ag nanoderivatives against Escherichia coli , Pseudomonas aeruginosa , Klebsiella pneumoniae , Staphylococcus aureus and Methicillin-resistant Staphylococcus aureus. Int J Pharm 2016; 511:90-97. [DOI: 10.1016/j.ijpharm.2016.06.121] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/23/2016] [Accepted: 06/26/2016] [Indexed: 11/20/2022]
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