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Latif Z, Rehman AU, Amin N, Arshad MI, Marzouki R. Graphene nanoplatelets (GNPs): a source to bring change in the properties of Co-Ni-Gd-ferrite/GNP nanocomposites. RSC Adv 2023; 13:34308-34321. [PMID: 38024970 PMCID: PMC10664697 DOI: 10.1039/d3ra02080k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 11/07/2023] [Indexed: 12/01/2023] Open
Abstract
The nanocomposites of Co0.5Ni0.5Gd0.03Fe1.97O4/graphene nanoplatelets (CNGF/GNPs) were synthesized by a cost-effective sol-gel auto combustion (SGAC) route. The X-ray diffraction analysis confirmed the cubic structure of the as-prepared nanocomposites, and a crystallite size of 32.28 nm was observed for the 7.5 wt% GNPs. Irregular and unique nanoparticles consisting of short stacks of graphene sheets having a platelet shape were confirmed by the morphological analysis of the as-prepared nanocomposites. Raman analysis revealed a spinel crystal structure along with a new vibrational mode due to the GNPs. The energy bandgap was 3.98 eV for the composite with 7.5 wt% GNP concentration. It was observed that the percentage temperature coefficient of resistance (TCR%) rapidly decreased with an increase in temperature both in low- and high-temperature ranges. Dielectric studies carried out in the frequency range 104-107 Hz confirmed that the graphene-added composites had high values for both the real and imaginary parts of permittivity at low frequencies. A decrease in saturation magnetization with an increase in GNP concentration was observed compared with the pure CNGF samples. Hence, the as-prepared composites are useful for application in high-frequency devices as well as spintronics.
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Affiliation(s)
- Zartashia Latif
- Department of Physics, Government College University Faisalabad Pakistan
| | - Atta Ur Rehman
- Department of Physics, Government College University Faisalabad Pakistan
| | - Nasir Amin
- Department of Physics, Government College University Faisalabad Pakistan
| | - Muhammad Imran Arshad
- Department of Physics, Government College University Faisalabad Pakistan
- Biophysics Group, Department of Physics and Astronomy, University College London Gower Street London WC1E 6BT UK
- UCL Healthcare Biomagnetics and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK
| | - Riadh Marzouki
- Department of Chemistry, College of Sciences, King khalid University Abha, 61413 Saudi Arabia
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Gong J, Li H, Zhang K, Zhang Z, Cao J, Shao Z, Tang C, Fu S, Wang Q, Wu X. Zinc-Ion Storage Mechanism of Polyaniline for Rechargeable Aqueous Zinc-Ion Batteries. NANOMATERIALS 2022; 12:nano12091438. [PMID: 35564147 PMCID: PMC9103876 DOI: 10.3390/nano12091438] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/18/2022] [Accepted: 04/14/2022] [Indexed: 02/04/2023]
Abstract
Aqueous multivalent ion batteries, especially aqueous zinc-ion batteries (ZIBs), have promising energy storage application due to their unique merits of safety, high ionic conductivity, and high gravimetric energy density. To improve their electrochemical performance, polyaniline (PANI) is often chosen to suppress cathode dissolution. Herein, this work focuses on the zinc ion storage behavior of a PANI cathode. The energy storage mechanism of PANI is associated with four types of protonated/non-protonated amine or imine. The PANI cathode achieves a high capacity of 74 mAh g−1 at 0.3 A g−1 and maintains 48.4% of its initial discharge capacity after 1000 cycles. It also demonstrates an ultrahigh diffusion coefficient of 6.25 × 10−9~7.82 × 10−8 cm−2 s−1 during discharging and 7.69 × 10−10~1.81 × 10−7 cm−2 s−1 during charging processes, which is one or two orders of magnitude higher than other reported studies. This work sheds a light on developing PANI-composited cathodes in rechargeable aqueous ZIBs energy storage devices.
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Affiliation(s)
- Jiangfeng Gong
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
- Correspondence: (J.G.); (C.T.); (X.W.)
| | - Hao Li
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
| | - Kaixiao Zhang
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
| | - Zhupeng Zhang
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
| | - Jie Cao
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
| | - Zhibin Shao
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
| | - Chunmei Tang
- College of Science, Hohai University, Nanjing 210098, China; (H.L.); (K.Z.); (Z.Z.); (J.C.); (Z.S.)
- Correspondence: (J.G.); (C.T.); (X.W.)
| | - Shaojie Fu
- National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China; (S.F.); (Q.W.)
| | - Qianjin Wang
- National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China; (S.F.); (Q.W.)
| | - Xiang Wu
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
- Correspondence: (J.G.); (C.T.); (X.W.)
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Wang X, Yan D, Liu L, Xu K, Zhong J. Biomass‐Derived Activated Carbon Nanoarchitectonics with Hibiscus Flowers for High‐Performance Supercapacitor Electrode Applications. Chem Eng Technol 2022. [DOI: 10.1002/ceat.202100585] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xingyan Wang
- Department of Environmental Science and Engineering, College of Environment and Resources Xiangtan University Xiangtan 411105 Hunan China
- National Base for International Science & Technology Cooperation, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry Xiangtan University Xiangtan 411105 Hunan China
| | - Dong Yan
- Department of Environmental Science and Engineering, College of Environment and Resources Xiangtan University Xiangtan 411105 Hunan China
| | - Lu Liu
- Department of Environmental Science and Engineering, College of Environment and Resources Xiangtan University Xiangtan 411105 Hunan China
| | - Ke Xu
- Department of Environmental Science and Engineering, College of Environment and Resources Xiangtan University Xiangtan 411105 Hunan China
| | - Jinghan Zhong
- Department of Environmental Science and Engineering, College of Environment and Resources Xiangtan University Xiangtan 411105 Hunan China
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Sadiq MA, Bahaidarah HMS. Numerical Study on Generalized Heat and Mass in Casson Fluid with Hybrid Nanostructures. NANOMATERIALS 2021; 11:nano11102675. [PMID: 34685110 PMCID: PMC8541252 DOI: 10.3390/nano11102675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022]
Abstract
The rheological model for yield stress exhibiting fluid and the basic laws for fluid flow and transport of heat and mass are used for the formulation of problems associated with the enhancement of heat and mass due to dispersion of nanoparticles in Casson. The heat and mass transfer obey non-Fourier's laws and the generalized Fick's law, respectively. Model problems are incorporated by thermal relaxation times for heat and mass. Transfer of heat energy and relaxation time are inversely proportional, and the same is the case for mass transport and concentration relaxation time. A porous medium force is responsible for controlling the momentum thickness. The yield stress parameter and diffusion of momentum in Casson fluid are noticed to be inversely proportional with each other. The concentration gradient enhances the energy transfer, and temperature gradient causes an enhancement diffusion of solute in Casson fluid. FEM provides convergent solutions. The relaxation time phenomenon is responsible for the restoration of thermal and solutal changes. Due to that, the thermal and solutal equilibrium states can be restored. The phenomenon of yield stress is responsible for controlling the momentum boundary layer thickness. A porous medium exerts a retarding force on the flow, and therefore, a deceleration in flow is observed. The thermal efficiency of MoS2-SiO2-Casson fluid is greater than the thermal efficiency of SiO2-Casson fluid.
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Affiliation(s)
- Muhammad A. Sadiq
- Department of Mathematics, DCC-KFUPM, P.O. Box 5084, Dhahran 31261, Saudi Arabia
- Interdisciplinary Research Center for Hydrogen and Energy Storage, KFUPM, Dhahran 31261, Saudi Arabia
- Correspondence:
| | - Haitham M. S. Bahaidarah
- Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
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