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Shah MM, Fatema M, Ansari DA, Gupta DK, Rather MUD. Tuning the structural, magnetic, and electrochemical properties of Mo-doped NiO nanostructures prepared by coprecipitation method. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Mala NA, Dar MA, Rather MUD, Sivakumar S, Husain S, Batoo KM. Enhanced electrochemical properties of zinc and manganese co-doped NiO nanostructures for its high-performance supercapacitor applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bordoloi K, Kalita GD, Das P. Acceptorless dehydrogenation of alcohols to carboxylic acids by palladium nanoparticles supported on NiO: delving into metal-support cooperation in catalysis. Dalton Trans 2022; 51:9922-9934. [PMID: 35723167 DOI: 10.1039/d2dt01311h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this work, we have developed a simple NiO-supported Pd nanocatalyst (Pd@NiO) for oxidant-free dehydrogenative oxidation of primary alcohols to carboxylic acids along with hydrogen gas as a byproduct. The catalyst has been characterized by techniques like XRD, HRTEM, SEM-EDX, XPS and ICP-AES. The nanostructured Pd@NiO material showed excellent dehydrogenative oxidation activity and outperformed the activity of free NiO or Pd nanoparticles supported on silica/carbon as a catalyst, which could be attributed to synergistic effect of Pd and NiO. A diverse range of aromatic and aliphatic primary alcohols could be efficiently converted to their corresponding carboxylates in high yields with a catalyst loading as low as 0.08 mol%. Notably, highly challenging biomass derived heterocyclic alcohols such as furfuryl alcohol and piperonyl alcohol can also be efficiently converted to their corresponding acids. Moreover, our catalyst can convert benzyl alcohol to benzoic acid on a gram scale with 89% yield. Interestingly, the H2 gas liberated in the reaction can also be used as a substrate for the hydrogenation of 3a to 4a in 65% yield. The nanostructured catalyst is highly reusable and no significant decrease in activity was observed after six reaction cycles. A kinetic study revealed that the reaction followed first-order kinetics with a rate constant of k = 1.47 × 10-4 s-1, under optimized conditions. The extent of reactivity of different functionalities towards dehydrogenation was also investigated using a Hammett plot showing good linearity.
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Affiliation(s)
- Krisangi Bordoloi
- Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India.
| | | | - Pankaj Das
- Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India.
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Wang J, Ma L, Wang X, Wang X, Yao J, Yi Q, Tang R, Zou G. Sub‐Nanometer Thick Wafer‐Size NiO Films with Room‐Temperature Ferromagnetic Behavior. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiong Wang
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Liang Ma
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Xiangyi Wang
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Xiaohan Wang
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Junjie Yao
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Qinghua Yi
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
| | - Rujun Tang
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215123 China
| | - Guifu Zou
- College of Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215123 China
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Wang J, Ma L, Wang X, Wang X, Yao J, Yi Q, Tang R, Zou G. Sub-Nanometer Thick Wafer-Size NiO Films with Room-Temperature Ferromagnetic Behavior. Angew Chem Int Ed Engl 2021; 60:25020-25027. [PMID: 34534391 DOI: 10.1002/anie.202110185] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Indexed: 12/18/2022]
Abstract
Adding ferromagnetism into semiconductors attracts much attentions due to its potential usage of magnetic spins in novel devices, such as spin field-effect transistors. However, it remains challenging to stabilize their ferromagnetism above room temperature. Here we introduce an atomic chemical-solution strategy to grow wafer-size NiO thin films with controllable thickness down to sub-nanometer scale (0.92 nm) for the first time. Surface lattice defects break the magnetic symmetry of NiO and produce surface ferromagnetic behaviors. Our sub-nanometric NiO thin film exhibits the highest reported room-temperature ferromagnetic behavior with a saturation magnetization of 157 emu/cc and coercivity of 418 Oe. Attributed to wafer size, the easily-transferred NiO thin film is further verified in a magnetoresistance device. Our work provides a sub-nanometric platform to produce wafer-size ferromagnetic NiO thin films as atomic layer magnetic units in future transparent magnetoelectric devices.
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Affiliation(s)
- Jiong Wang
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Liang Ma
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Xiangyi Wang
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Xiaohan Wang
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Junjie Yao
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Qinghua Yi
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
| | - Rujun Tang
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215123, China
| | - Guifu Zou
- College of Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215123, China
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Gawali SR, Gandhi AC, Gaikwad SS, Pant J, Chan TS, Cheng CL, Ma YR, Wu SY. Role of cobalt cations in short range antiferromagnetic Co 3O 4 nanoparticles: a thermal treatment approach to affecting phonon and magnetic properties. Sci Rep 2018; 8:249. [PMID: 29321560 PMCID: PMC5762665 DOI: 10.1038/s41598-017-18563-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 12/14/2017] [Indexed: 11/09/2022] Open
Abstract
We report the phonon and magnetic properties of various well-stabilized Co3O4 nanoparticles. The net valence in cobalt (II)/(III) cation can be obtained by subtracting the Co2+ ions in tetrahedral interstices and Co3+ ions in the octahedral interstices, respectively, which will possess spatial inhomogeneity of its magnetic moment via Co2+ in tetrahedra and Co3+ in octahedral configurations in the normal spinel structure. Furthermore, the distribution of Co2+/Co3+ governed by various external (magnetic field and temperature) and internal (particle size and slightly distorted CoO6 octahedra) sources, have led to phenomena such as a large redshift of phonon-phonon interaction and short-range magnetic correlation in the inverse spinel structure. The outcome of our study is important in terms of the future development of magnetic semiconductor spintronic devices of Co3O4.
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Affiliation(s)
- Swati R Gawali
- Department of Physics, CES's Dr. A. B. Telang Sr. College, Savitribai Phule Pune University, Pune, 411007, India
| | | | | | - Jayashree Pant
- Department of Physics, Abasaheb Garware College, Savitribai Phule Pune University, Pune, 411007, India
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Chia-Liang Cheng
- Department of Physics, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Yuan-Ron Ma
- Department of Physics, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Sheng Yun Wu
- Department of Physics, National Dong Hwa University, Hualien, 97401, Taiwan.
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Abstract
Magnetism without d-orbital electrons seems to be unrealistic; however, recent observations of magnetism in non-magnetic oxides, such as ZnO, HfO2, and MgO, have opened new avenues in the field of magnetism. Magnetism exhibited by these oxides is known as d° ferromagnetism, as these oxides either have completely filled or unfilled d-/f-orbitals. This magnetism is believed to occur due to polarization induced by p-orbitals. Magnetic polarization in these oxides arises due to vacancies, the excitation of trapped spin in the triplet state. The presence of vacancies at the surface and subsurface also affects the magnetic behavior of these oxides. In the present review, origins of magnetism in magnesium oxide are discussed to obtain understanding of d° ferromagnetism.
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Chatterjee S, Maiti R, Miah M, Saha SK, Chakravorty D. NiO Nanoparticle Synthesis Using a Triblock Copolymer: Enhanced Magnetization and High Specific Capacitance of Electrodes Prepared from the Powder. ACS OMEGA 2017; 2:283-289. [PMID: 31457228 PMCID: PMC6640950 DOI: 10.1021/acsomega.6b00384] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/09/2017] [Indexed: 06/01/2023]
Abstract
Nickel oxide nanoparticles of diameter ∼21 nm were prepared by a sol-gel method using the triblock copolymer poly(ethylene glycol)-b-(propylene glycol)-b-(ethylene glycol). X-ray photoelectron spectroscopy analysis showed the presence of Ni2+ and Ni3+ ions in the material. The electrical conductivity of this material was due to small polaron hopping between Ni2+ and Ni3+ sites. The magnetization shown by these nanoparticles was much higher than that reported in the literature. This is ascribed to the presence of Ni3+ ions with uncompensated spin moments. Spin-glass behavior was exhibited by the material at 10.7 K. The electrochemical characterization of electrodes comprising of these NiO nanoparticles using cyclic voltammetric measurements showed a specific capacitance value of 810 F/g, the highest reported for this material. These materials will thus form one of the useful multifunctional systems.
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Affiliation(s)
- Soumi Chatterjee
- MLS
Professor’s Unit and Department of Materials Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Ramaprasad Maiti
- MLS
Professor’s Unit and Department of Materials Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Milon Miah
- MLS
Professor’s Unit and Department of Materials Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Shyamal Kumar Saha
- MLS
Professor’s Unit and Department of Materials Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Dipankar Chakravorty
- MLS
Professor’s Unit and Department of Materials Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, India
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