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Megala S, Silambarasan A, Kanagesan S, Selvaraj M, Maadeswaran P, Ramesh R, Alam MM, Assiri MA. Interfacial coupling of CuWO4 nanoparticles on NiAl LDH as a novel photoctalyst for dissolved organic dye degradation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Li Y, Yan X, Zhang W, Zhou W, Zhu Y, Zhang M, Zhu W, Cheng X. Hierarchical micro-nano structure based NiCoAl-LDH nanosheets reinforced by NiCo2S4 on carbon cloth for asymmetric supercapacitor. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115982] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Khan AS, Pan L, Farid A, Javid M, Huang H, Zhao Y. Carbon nanocoils decorated with a porous NiCo 2O 4 nanosheet array as a highly efficient electrode for supercapacitors. NANOSCALE 2021; 13:11943-11952. [PMID: 34198318 DOI: 10.1039/d1nr00949d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Well-organized substrate materials are of considerable significance in the development of energy-efficient pseudocapacitor electrodes. Herein, functionalized three-dimensional (3D) carbon nanocoils on nickel foam (CNCs/NF) have been used as the substrate to grow faradaic nickel cobaltite (NiCo2O4) via a solvothermal method. The arrays of NiCo2O4 were assembled by interconnected ultrathin nanosheets with random inter-particle pores. The number of electroactive sites increased specifically because of the porous feature of NiCo2O4 nanosheets and the 3D structure of CNCs/NF. Moreover, the CNCs/NF network aided the electrolyte ions in diffusing deeply within the architecture. The NiCo2O4/CNCs/NF composite exhibited an outstanding specific capacitance of 2821 F g-1 at the current density of 1 A g-1, a remarkable rate capability (82.4%) and long cyclic stability (91.7% after 3000 cycles). Such encouraging electrochemical performance was attributed mainly to the synergistic interactions of NiCo2O4 arrays and CNCs/NF substrate that helped achieve efficient redox reactions, enhanced ion diffusivity and excellent electron conductivity. In summary, this binder-free NiCo2O4/CNCs/NF composite electrode paves a way towards the synthesis of highly efficacious electrodes for supercapacitors.
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Affiliation(s)
- Abdul Sammed Khan
- School of Physics, Dalian University of Technology, Dalian, 116024, P.R. of China.
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Bhuvaneswari K, Palanisamy G, Bharathi G, Pazhanivel T, Upadhyaya IR, Kumari MLA, Rajesh RP, Govindasamy M, Ghfar A, Al-Shaalan NH. Visible light driven reduced graphene oxide supported ZnMgAl LTH/ZnO/g-C 3N 4 nanohybrid photocatalyst with notable two-dimension formation for enhanced photocatalytic activity towards organic dye degradation. ENVIRONMENTAL RESEARCH 2021; 197:111079. [PMID: 33775684 DOI: 10.1016/j.envres.2021.111079] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
In this study, 2D/2D/2D heterostructured r-GO/LTH/ZnO/g-C3N4 nanohybrid were synthesized through hydrothermal method. The strong electrostatic interaction between the negatively charged g-C3N4 and r-GO nanosheets with positively charged layered triple hydroxide (LTH) nanosheets are effectively influences the successful formation of heterojunction. The LTH nanosheets are well spread on the g-C3N4 nanosheets combined with r-GO. In particular, the as prepared heterojunction shows a better photocatalytic degradation activity compared to pristine samples and the significant enhancement in the photocatalytic performance is mainly accredited to the large interfacial charge transition of photogenerated charge carriers under the visible light irradiation. Although the 2D/2D/2D heterojunction effectively hinders the charge carrier recombination resulting high photocatalytic activity with good stability. In addition, the r-GO supported LTH/ZnO/g-C3N4 heterojunction shows high photo-stability after sequential experimental runs with no obvious change in the dye degradation process. Consequently, the role of active species was investigated over the r-GO/LTH/ZnO/g-C3N4 heterojunction with the help of different scavengers.
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Affiliation(s)
- K Bhuvaneswari
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
| | - G Palanisamy
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
| | - G Bharathi
- Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province 518060, PR China
| | - T Pazhanivel
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India.
| | - Indra Raj Upadhyaya
- Department of Chemistry Education, Chungbuk National University, Chungcheongbuk-do, 28644, Republic of Korea
| | - M L Aruna Kumari
- Department of Chemistry, M.S. Ramaiah College of Arts, Science and Commerce, Bengaluru, 560054, India
| | - R P Rajesh
- Molecular & Nanomedicine Research Unit, Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, 600119, India
| | - Mani Govindasamy
- Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ayman Ghfar
- Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Nora Hamad Al-Shaalan
- Chemistry Department P. O. Box 84428, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia
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Hamad HA, Nageh H, El-Bery HM, Kasry A, Carrasco-Marín F, Elhady OM, Soliman AMM, El-Remaily MAEAAA. Unveiling the exceptional synergism-induced design of Co-Mg-Al layered triple hydroxides (LTHs) for boosting catalytic activity toward the green synthesis of indol-3-yl derivatives under mild conditions. J Colloid Interface Sci 2021; 599:227-244. [PMID: 33945970 DOI: 10.1016/j.jcis.2021.04.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/10/2021] [Accepted: 04/18/2021] [Indexed: 12/13/2022]
Abstract
The current study provides a novel insight into the role of synergism of the changes in Mg2+/ Al3+ in the best catalytic activity of indol-3-yl derivatives. A series of Co-Mg-Al layered triple hydroxides (LTHs) catalysts were produced by altering the Al3+/Mg2+ ratio with respect to Co2+. The physicochemical properties of LTHs were well characterized by ICP-AES, XRD, FTIR, FE-SEM, BET, Zeta-sizer, and VSM. The results show that the sample CMA4 (Co2+:Mg2+:Al3+ 2:4:4) is an exception to the physicochemical characteristics of the produced Co-Mg-Al LTHs, which is due to the synergism between the changes in Mg2+ and Al3+. To the best of our knowledge, this is the first study to report the synthesis of indol-3-yl derivatives from indole-3-carbaldehyde using Co-Mg-Al LTHs as highly efficient heterogeneous catalysts, which is an extremely appealing path. The selectivity of the synthesis was studied by condensing various nucleophiles through the one-pot method that established superior reactivity under mild conditions. Notably, the results show that the Co-Mg-Al LTHs system exhibited an extraordinarily catalytic activity, with the highest yield (98%) being obtained under the following optimal conditions: the concentration of Co-Mg-Al LTHs = 5 mol%, 30 min., water/ethanol as solvent. Furthermore, the reusable studies exhibited that the catalysts were found to be stable and reusable for up to six cycles without substantial loss of catalytic activity. Finally, a plausible reaction mechanism of the Co-Mg-Al LTHs system for indol-3-yl derivatives was put forward according to our comprehensive analysis. Our work illuminates a cheap and flexible strategy for the synthesis of indol-3-yl derivatives using Co-Mg-Al LTHs.
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Affiliation(s)
- Hesham A Hamad
- Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O. Box 21934 Alexandria, Egypt.
| | - Hassan Nageh
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), El-Sherouk City, Suez Desert Road, 11837 Cairo, Egypt
| | - Haitham M El-Bery
- Advanced Multifunctional Materials Laboratory, Department of Chemistry, Faculty of Science, Assiut University, 71515 Assiut, Egypt
| | - Amal Kasry
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), El-Sherouk City, Suez Desert Road, 11837 Cairo, Egypt
| | - Francisco Carrasco-Marín
- Adsorption and Catalysis Lab., Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Omar M Elhady
- Department of Chemistry, Faculty of Science, Sohag University, 82524 Sohag, Egypt
| | - Ahmed M M Soliman
- Department of Chemistry, Faculty of Science, Sohag University, 82524 Sohag, Egypt
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Muhammad I, Jabeen M, Wang P, He YS, Liao XZ, Ma ZF. Spray-dried assembly of 3D N,P-Co-doped graphene microspheres embedded with core-shell CoP/MoP@C nanoparticles for enhanced lithium-ion storage. Dalton Trans 2021; 50:4555-4566. [PMID: 33729235 DOI: 10.1039/d1dt00210d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The advancement of novel synthetic approaches for micro/nanostructural manipulation of transition metal phosphide (TMP) materials with precisely controlled engineering is crucial to realize their practical use in batteries. Here, we develop a novel spray-drying strategy to construct three-dimensional (3D) N,P co-doped graphene (G-NP) microspheres embedded with core-shell CoP@C and MoP@C nanoparticles (CoP@C⊂G-NP, MoP@⊂G-NP). This intentional design shows a close correlation between the microstructural G-NP and chemistry of the core-shell CoP@C/MoP@C nanoparticle system that contributes towards their anode performance in lithium-ion batteries (LIBs). The obtained structure features a conformal porous G-NP framework prepared via the co-doping of heteroatoms (N,P) that features a 3D conductive highway that allows rapid ion and electron passage and maintains the overall structural integrity of the material. The interior carbon shell can efficiently restrain volume evolution and prevent CoP/MoP nanoparticle aggregation, providing excellent mechanical stability. As a result, the CoP@C⊂G-NP and MoP@⊂G-NP composites deliver high specific capacities of 823.6 and 602.9 mA h g-1 at a current density of 0.1 A g-1 and exhibit excellent cycling stabilities of 438 and 301 mA h g-1 after 500 and 800 cycles at 1 A g-1. The present work details a novel approach to fabricate core-shell TMPs@C⊂G-NP-based electrode materials for use in next-generation LIBs and can be expanded to other potential energy storage applications.
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Affiliation(s)
- Ishaq Muhammad
- Shanghai Electrochemical Energy Devices Research Centre, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
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Parveen S, Kavyashree, Pandey S. Electrochemical study of 3D hierarchical dandelion-fiber flake-like structure of Al(OH)3/MnO2 nanocomposite thin film for future supercapacitor applications. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.07.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang X, Zhang J, Yang S, Yan H, Hong X, Dong W, Liu Y, Zhang B, Wen Z. Interlayer space regulating of NiMn layered double hydroxides for supercapacitors by controlling hydrothermal reaction time. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ishaq M, Jabeen M, Song W, Xu L, Li W, Deng Q. Fluorinated graphene-supported Nickel-Cobalt-Iron nitride nanoparticles as a promising hybrid electrode for supercapacitor applications. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.087] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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