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Zhang Z, Shi H, Zhuang B, Luo M, Hu Z. The microstrain-accompanied structural phase transition from h-MoO 3 to α-MoO 3 investigated by in situ X-ray diffraction. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:692-700. [PMID: 37346787 PMCID: PMC10280079 DOI: 10.3762/bjnano.14.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/17/2023] [Indexed: 06/23/2023]
Abstract
In situ X-ray diffraction indicates that the structural phase transition from h-MoO3 to α-MoO3 is a first-order transition with a phase transition temperature range of 378.5-443.1 °C. The linear coefficients of thermal expansion of h-MoO3 are strongly anisotropic, that is, αa=b = 72.87 × 10-6 K-1 and αc = -19.44 × 10-6 K-1. In the h-MoO3 phase, water molecules are located at the (0 0 0.25) site inside the MoO6 octahedra tunnel that is formed by six MoO6 corner-sharing octahedron zigzag chains. With increasing temperature, the release of water molecules from the octahedra tunnel causes the octahedra chains to shrink and the octahedra tunnel to expand. When the phase transition occurs, the anomalous expansion of the MoO6 octahedra tunnel ruptures the Mo-O2 bonds, forming individual MoO6 octahedron zigzag chains that then share corners to generate octahedron layers in the ⟨100⟩α direction. The octahedron layers are bonded by van der Waals interactions in the ⟨010⟩α direction, crystalizing into the α-MoO3 structure.
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Affiliation(s)
- Zeqian Zhang
- School of Science, Minzu University of China, 27 Zhong guancun South Avenue, Haidian District, Beijing, 100081, China
| | - Honglong Shi
- School of Science, Minzu University of China, 27 Zhong guancun South Avenue, Haidian District, Beijing, 100081, China
| | - Boxiang Zhuang
- School of Science, Minzu University of China, 27 Zhong guancun South Avenue, Haidian District, Beijing, 100081, China
| | - Minting Luo
- Institutional Center for Shared Technologies and Facilities of Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhenfei Hu
- School of Science, Minzu University of China, 27 Zhong guancun South Avenue, Haidian District, Beijing, 100081, China
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Zubar TI, Fedosyuk VM, Trukhanov SV, Tishkevich DI, Michels D, Lyakhov D, Trukhanov AV. Method of surface energy investigation by lateral AFM: application to control growth mechanism of nanostructured NiFe films. Sci Rep 2020; 10:14411. [PMID: 32873846 PMCID: PMC7462866 DOI: 10.1038/s41598-020-71416-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/07/2020] [Indexed: 11/09/2022] Open
Abstract
A new method for the specific surface energy investigation based on a combination of the force spectroscopy and the method of nanofriction study using atomic force microscopy was proposed. It was shown that air humidity does not affect the results of investigation by the proposed method as opposed to the previously used methods. Therefore, the method has high accuracy and repeatability in air without use of climate chambers and liquid cells. The proposed method has a high local resolution and is suitable for investigation of the specific surface energy of individual nanograins or fixed nanoparticles. The achievements described in the paper demonstrate one of the method capabilities, which is to control the growth mechanism of thin magnetic films. The conditions for the transition of the growth mechanism of thin Ni80Fe20 films from island to layer-by-layer obtained via electrolyte deposition have been determined using the proposed method and the purpose made probes with Ni coating.
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Affiliation(s)
- T I Zubar
- SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki str., 19, 220072, Minsk, Belarus. .,South Ural State University, Lenin Prospect, 76, Chelyabinsk, Russia, 454080.
| | - V M Fedosyuk
- SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki str., 19, 220072, Minsk, Belarus
| | - S V Trukhanov
- SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki str., 19, 220072, Minsk, Belarus.,South Ural State University, Lenin Prospect, 76, Chelyabinsk, Russia, 454080
| | - D I Tishkevich
- SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki str., 19, 220072, Minsk, Belarus.,South Ural State University, Lenin Prospect, 76, Chelyabinsk, Russia, 454080
| | - D Michels
- Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - D Lyakhov
- Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - A V Trukhanov
- SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki str., 19, 220072, Minsk, Belarus.,South Ural State University, Lenin Prospect, 76, Chelyabinsk, Russia, 454080.,National University of Science and Technology MISiS, Leninsky Prospekt, 4, Moscow, Russia, 119049
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Kim JH, Hyun C, Kim H, Dash JK, Ihm K, Lee GH. Thickness-Insensitive Properties of α-MoO 3 Nanosheets by Weak Interlayer Coupling. NANO LETTERS 2019; 19:8868-8876. [PMID: 31702164 DOI: 10.1021/acs.nanolett.9b03701] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
van der Waals (vdW) materials have shown unique electrical and optical properties depending on the thickness due to strong interlayer interaction and symmetry breaking at the monolayer level. In contrast, the study of electrical and tribological properties and their thickness-insensitivity of van der Waals oxides are lacking due to difficulties in the fabrication of high quality two-dimensional oxides and the investigation of nanoscale properties. Here we investigated various tribological and electrical properties, such as, friction, adhesion, work function, tunnel current, and dielectric constant, of the single-crystal α-MoO3 nanosheets epitaxially grown on graphite by using atomic force microscopy. The friction of atomically smooth MoO3 is rapidly saturated within a few layers. The thickness insensitivity of friction is due to very weak mechanical interlayer interaction. Similarly, work function (4.73 eV for 2 layers (hereafter denoted as L)) and dielectric constant (6 for 2L and 10.5-11 for >3L) of MoO3 in MoO3 showed thickness insensitivity due to weak interlayer coupling. Tunnel current measurements by conductive atomic force microscopy showed that even 2L MoO3 of 1.4 nm is resistant to tunneling with a high dielectric strength of 14 MV/cm. The thickness-indifferent electrical properties of high dielectric constant and tunnel resistance by weak interlayer coupling and high crystallinity show a promise in the use of MoO3 nanosheets for nanodevice applications.
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Affiliation(s)
| | - Changbae Hyun
- Department of Physics , Pohang University of Science and Technology , 37673 , Pohang , Korea
| | | | - Jatis Kumar Dash
- Department of Physics , SRM University-AP , Amaravati , Andhra Pradesh 522502 , India
| | - Kyuwook Ihm
- Department of Physics and Pohang Accelerator Laboratory , Pohang University of Science and Technology , 37673 , Pohang , Korea
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de Castro IA, Datta RS, Ou JZ, Castellanos-Gomez A, Sriram S, Daeneke T, Kalantar-Zadeh K. Molybdenum Oxides - From Fundamentals to Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701619. [PMID: 28815807 DOI: 10.1002/adma.201701619] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 04/27/2017] [Indexed: 05/20/2023]
Abstract
The properties and applications of molybdenum oxides are reviewed in depth. Molybdenum is found in various oxide stoichiometries, which have been employed for different high-value research and commercial applications. The great chemical and physical characteristics of molybdenum oxides make them versatile and highly tunable for incorporation in optical, electronic, catalytic, bio, and energy systems. Variations in the oxidation states allow manipulation of the crystal structure, morphology, oxygen vacancies, and dopants, to control and engineer electronic states. Despite this overwhelming functionality and potential, a definitive resource on molybdenum oxide is still unavailable. The aim here is to provide such a resource, while presenting an insightful outlook into future prospective applications for molybdenum oxides.
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Affiliation(s)
| | | | - Jian Zhen Ou
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | | | - Sharath Sriram
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Torben Daeneke
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
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Sundeep D, Gopala Krishna A, Ravikumar RVSSN, Vijaya Kumar T, Daniel Ephraim S, Pavan YL. Spectral characterization of mechanically synthesized MoO3-CuO nanocomposite. INTERNATIONAL NANO LETTERS 2016. [DOI: 10.1007/s40089-015-0178-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zekonyte J, Polcar T. Friction Force Microscopy Analysis of Self-Adaptive W-S-C Coatings: Nanoscale Friction and Wear. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21056-21064. [PMID: 26340161 DOI: 10.1021/acsami.5b05546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Transition metal dichalcogenides (TMD) are increasingly popular due to unique structural and mechanical properties. They belong, together with graphene and similar 2D materials, to a small family of solid lubricants with potential to produce ultralow friction state. At the macroscale, low friction stems from the ability to form well-oriented films on the sliding surface (typically up to 10 nm thick), with the TMD basal planes aligned parallel to the surface. In this study, we quantitatively evaluate tribological properties of three sputtered tungsten-sulfur-carbon (W-S-C) coatings at a nanoscale using friction force microscopy. In particular, we investigate possible formation of well-ordered tungsten disulfide (WS2) layers on the coating surface. The coefficient of friction decreased with increasing load independently of coating composition or mechanical properties. In contrast, hard coatings with high tungsten carbide content were more resistant to wear. We successfully identified a WS2 tribolayer at the sliding interface, which peeled off as ultrathin flakes and attached to AFM tip. Nanoscale tribological behavior of WSC coatings replicates deviation of Amonton's law observed in macroscale testing and strongly suggests that the tribolayer is formed almost immediately after the start of sliding.
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Affiliation(s)
- Jurgita Zekonyte
- School of Engineering, University of Portsmouth , Anglesea Building, Anglesea Road, Portsmouth PO1 3DJ, United Kingdom
| | - Tomas Polcar
- National Centre for Advanced Tribology (nCATS), Faculty of Engineering and Environment, University of Southampton , Southampton SO17 1BJ, United Kingdom
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague , Technicka 2, Prague 166 27, Czech Republic
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Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Nanoparticles by Albumen, Assisting Microwave Process for Dehydrogenation of 1,4-Dihydropyridines. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0730-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ibrahem MA, Wu FY, Mengistie DA, Chang CS, Li LJ, Chu CW. Direct conversion of multilayer molybdenum trioxide to nanorods as multifunctional electrodes in lithium-ion batteries. NANOSCALE 2014; 6:5484-5490. [PMID: 24728234 DOI: 10.1039/c4nr00692e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study we prepared molybdenum trioxide (MoO3) nanorods having average lengths of 0.5-1.5 μm and widths of approximately 100-200 nm through a one-step mechanical break-down process involving favorable fracturing along the crystal direction. We controlled the dimensions of the as-prepared nanorods by applying various imposing times (15-90 min). The nanorods prepared over a reaction time of 90 min were, on average, much shorter and narrower relative to those obtained over 30 min. Evaluations of lithium-ion storage properties revealed that the electrochemical performance of these nanorods was much better than that of bulk materials. As cathodes, the nanorods could deliver a high specific capacity (>315 mA h g(-1)) with losses of less than 2% in the first cycle at a rate of 30 mA g(-1); as anodes, the specific capacity was 800 mA h g(-1) at a rate of 50 mA g(-1). Relative to α-MoO3 microparticles, these nanorods displayed significantly enhanced lithium-ion storage properties with higher reversible capacities and better rate performance, presumably because their much shorter diffusion lengths and higher specific surface areas allowed more-efficient insertion/deinsertion of lithium ions during the charge/discharge process. Accordingly, enhanced physical and/or chemical properties can be obtained through appropriate nanostructuring of materials.
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Yordanov R, Boyadjiev S, Georgieva V, Vergov L. Characterization of thin MoO3films formed by RF and DC-magnetron reactive sputtering for gas sensor applications. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/514/1/012040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
h-MoO3 nanorods are deposited on a FTO substrate by a two step chemical bath deposition method. The first stage of the deposition is the nucleation step followed by growth at the second stage.
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Affiliation(s)
- Arpan Dhara
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai-400 076, India
| | - Gary Hodes
- Department of Materials and Interfaces
- Weizmann Institute of Science
- Rehovot-76100, Israel
| | - Shaibal K. Sarkar
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai-400 076, India
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Li F, Chen Z. Tuning electronic and magnetic properties of MoO3 sheets by cutting, hydrogenation, and external strain: a computational investigation. NANOSCALE 2013; 5:5321-5333. [PMID: 23392527 DOI: 10.1039/c3nr33009e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Density functional theory computations were performed to examine the electronic and magnetic properties of MoO3 two-dimensional (2D) nanosheets and their derived one-dimensional (1D) nanoribbons (NRs). The pristine 2D MoO3 sheet is a nonmagnetic semiconductor with an indirect band gap, but can be transformed to a magnetic metal when the surface O atoms are saturated by H. Depending on the cutting pattern, the pristine 1D NRs can be indirect band gap nonmagnetic semiconductors, magnetic semiconductors or magnetic metals. The fully hydrogenated NRs are metallic, while the edge-passivated NRs possess the nonmagnetic semiconducting feature, but with narrower band gap values compared to the pristine NRs. Both the 2D monolayer MoO3 sheet and the 1D nanoribbons maintain the semiconducting behaviors when exerting axial strain. These findings provide a simple and effective route to tune the magnetic and electronic properties of MoO3 nanostructures in a wide range and also facilitate the design of MoO3-based nanodevices.
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Affiliation(s)
- Fengyu Li
- Department of Physics, Department of Chemistry, Institute for Functional Nanomaterials, University of Puerto Rico, Rio Piedras Campus, San Juan, PR 00931
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14
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Hod O. The Registry Index: A Quantitative Measure of Materials′ Interfacial Commensurability. Chemphyschem 2013; 14:2376-91. [DOI: 10.1002/cphc.201300259] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Indexed: 11/10/2022]
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Dong Y, Li S, Xu H, Yan M, Xu X, Tian X, Liu Q, Mai L. Wrinkled-graphene enriched MoO3 nanobelts with increased conductivity and reduced stress for enhanced electrochemical performance. Phys Chem Chem Phys 2013; 15:17165-70. [DOI: 10.1039/c3cp53267d] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kang JH, Paek SM, Choy JH. In Situ X-ray Absorption Spectroscopic Study for α-MoO3Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.12.3675] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Díaz C, Lavayen V, O'Dwyer C. Single-crystal micro/nanostructures and thin films of lamellar molybdenum oxide by solid-state pyrolysis of organometallic derivatives of a cyclotriphosphazene. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2010.05.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Madhu Mohan V, Bin H, Chen W. Enhancement of electrochemical properties of MoO3 nanobelts electrode using PEG as surfactant for lithium battery. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1054-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cheng L, Shao M, Wang X, Hu H. Single-Crystalline Molybdenum Trioxide Nanoribbons: Photocatalytic, Photoconductive, and Electrochemical Properties. Chemistry 2009; 15:2310-6. [DOI: 10.1002/chem.200802182] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Chu WG, Wang HF, Guo YJ, Zhang LN, Han ZH, Li QQ, Fan SS. Catalyst-Free Growth of Quasi-Aligned Nanorods of Single Crystal Cu3Mo2O9 and Their Catalytic Properties. Inorg Chem 2009; 48:1243-9. [DOI: 10.1021/ic801885c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- W. G. Chu
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - H. F. Wang
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - Y. J. Guo
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - L. N. Zhang
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - Z. H. Han
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - Q. Q. Li
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
| | - S. S. Fan
- National Center for Nanoscience and Technology of China, Beijing 100085, P. R. China, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100085, P. R. China, and Department of Physics, Tsinghua University, Beijing 100085, P. R. China
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Characterization of Reactive Sputtered Molybdenum Oxide Thin Films for Gas Sensors. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2009. [DOI: 10.1380/ejssnt.2009.796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Li G, Jiang L, Pang S, Peng H, Zhang Z. Molybdenum Trioxide Nanostructures: The Evolution from Helical Nanosheets to Crosslike Nanoflowers to Nanobelts. J Phys Chem B 2006; 110:24472-5. [PMID: 17134203 DOI: 10.1021/jp064855v] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
MoO(3) nanostructures with different morphologies, such as helical nanosheets, crosslike nanoflowers, and nanobelts, have been synthesized on a large scale by an environmentally friendly chemical route. The evolution process from helical nanosheets to crosslike nanoflowers to nanobelts is observed for the first time. The influences of reaction time and the molar ratio of molybdenum and H(2)O(2) on the morphologies of MoO(3) nanostructures have been investigated. The synthetic process is environmentally friendly and may be extended to synthesize nanostructures of other metal (W, Ti, and Cr) oxides.
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Affiliation(s)
- Guicun Li
- Key Laboratory of Nanostructured Materials, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.
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24
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Zeng HC. Synthetic architecture of interior space for inorganic nanostructures. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b511296f] [Citation(s) in RCA: 436] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li W, Cheng F, Tao Z, Chen J. Vapor-Transportation Preparation and Reversible Lithium Intercalation/Deintercalation of α-MoO3 Microrods. J Phys Chem B 2005; 110:119-24. [PMID: 16471508 DOI: 10.1021/jp0553784] [Citation(s) in RCA: 185] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report on the preparation and electrochemical application of rechargeable lithium-ion batteries of alpha-MoO3 microrods. A simple and efficient vapor-transportation approach was developed to yield large-scale alpha-MoO3 microrods. The as-prepared products were present in long, uniform, rodlike structures with a diameter of approximately 2 approximately 6 microm, and the proportion of the rod morphology was about 95% according to the analysis of scanning electron microscopy (SEM). The electrochemical lithium intercalation/deintercalation characteristic of the as-prepared microrods was investigated by cyclic voltammetry and a galvanostatic charge-discharge method. The results showed that the alpha-MoO3 microrods exhibited high capacity (225 mAh g(-1)) and excellent cycling reversibility, and are thus promising cathode candidates in advanced rechargeable lithium-ion batteries. The correlation between the specific structural features of the microrods and their superior electrode performance is discussed in detail, revealing that the unique rodlike structure plays an important role in optimizing the electrochemical performance of the electrode.
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Affiliation(s)
- Weiyang Li
- Institute of New Energy Materials Chemistry, Nankai University, Tianjin 300071, P R China
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Song RQ, Xu AW, Deng B, Fang YP. Novel Multilamellar Mesostructured Molybdenum Oxide Nanofibers and Nanobelts: Synthesis and Characterization. J Phys Chem B 2005; 109:22758-66. [PMID: 16853965 DOI: 10.1021/jp0533325] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One-dimensional molybdenum oxide nanostructures with layered mesostructures were prepared directly from commercial bulk MoO3 crystals by a surfactant-templated hydrothermal process. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectra, and thermal analyses have been used to characterize the obtained molybdenum oxide nanomaterials. By use of cetyltrimethylammonium bromide as the structure-directing template, novel molybdenum oxide nanofibers with triple interlayer distances of 2.84, 2.66, and 2.46 nm have been obtained. The nanofibers have diameters of 20-100 nm and length up to 20 microm. The growth of multilamellar molybdenum oxide nanofibers can be interpreted by the combination of surfactant/inorganic self-assembly process and host/guest intercalation chemistry. On the basis of the X-ray diffraction and infrared results, a possible arrangement of surfactant in the interlayer space of molybdenum oxide by bilayer micelles with different tilt angles has been proposed. In addition, the thermal stability of surfactant has been improved by intercalation. Moreover, molybdenum oxide nanobelts with two kinds of interlayered structures were also produced in the presence of n-alkylamines (n = 12, 14, 16, and 18) following a similar method, these nanobelts show length up to more than 10 microm, width ranging between 200 and 600 microm, and width-to-thickness ratios of about 3-12. A linear relationship is observed between the interlayer distance and the number of carbon atoms in n-alkyl chains.
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Affiliation(s)
- Rui-Qi Song
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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27
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Dienwiebel M, Verhoeven GS, Pradeep N, Frenken JWM, Heimberg JA, Zandbergen HW. Superlubricity of graphite. PHYSICAL REVIEW LETTERS 2004; 92:126101. [PMID: 15089689 DOI: 10.1103/physrevlett.92.126101] [Citation(s) in RCA: 407] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2003] [Indexed: 05/07/2023]
Abstract
Using a home-built frictional force microscope that is able to detect forces in three dimensions with a lateral force resolution down to 15 pN, we have studied the energy dissipation between a tungsten tip sliding over a graphite surface in dry contact. By measuring atomic-scale friction as a function of the rotational angle between two contacting bodies, we show that the origin of the ultralow friction of graphite lies in the incommensurability between rotated graphite layers, an effect proposed under the name of "superlubricity" [Phys. Rev. B 41, 11 837 (1990)]].
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Affiliation(s)
- Martin Dienwiebel
- Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
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Lou XW, Zeng HC. Complex alpha-MoO(3) nanostructures with external bonding capacity for self-assembly. J Am Chem Soc 2003; 125:2697-704. [PMID: 12603157 DOI: 10.1021/ja029086h] [Citation(s) in RCA: 189] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Through manipulating crystal growth directions, we devised a versatile synthetic method to fabricate complex alpha-MoO(3) nanostructures with external bonding capacity for self-organization. Using four-armed forklike alpha-MoO(3) as nanobuilding blocks, we assembled more complex crystal morphologies, such as centrally holed nanorods, tridents, and paintbrushes. With prolonged ultrasonic treatments, pristine forklike alpha-MoO(3) crystals can be turned into less armed nanostructures, giving away the secondary arms (width < 100 nm) at the same time. On the other hand, the resultant alpha-MoO(3) itself can act as a template to produce shaped TiO(2) and other nanocrystals. Square- and horseshoe-shaped nanocrystals of anatase TiO(2) are left undissolved after removing alpha-MoO(3) templates in basic medium.
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Affiliation(s)
- Xiong Wen Lou
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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Wei XM, Zeng HC. Large-Scale Organizations of MoO3 Nanoplatelets with Single-Crystalline MoO3(4,4‘-bipyridyl)0.5. J Phys Chem B 2003. [DOI: 10.1021/jp0274177] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xu Ming Wei
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
| | - Hua Chun Zeng
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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30
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Hsu ZY, Zeng HC. Generation of Double-Layer Steps on (010) Surface of Orthorhombic MoO3 via Chemical Etching at Room Temperature. J Phys Chem B 2000. [DOI: 10.1021/jp001521b] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Z. Y. Hsu
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
| | - H. C. Zeng
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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31
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Ball P. Carry that load. Nature 1999. [DOI: 10.1038/news991014-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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