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Li Y, Kong F, Wang B, Zhao Y, Wang Z. Preparation of shape-controlling VO 2(M/R) nanoparticles via one-step hydrothermal synthesis. FRONTIERS OF OPTOELECTRONICS 2021; 14:311-320. [PMID: 36637725 PMCID: PMC9743865 DOI: 10.1007/s12200-020-1006-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 05/27/2020] [Indexed: 06/16/2023]
Abstract
In this study, we developed a facile one-step hydrothermal process that allows to synthesize high-purity VO2(M/R) nanoparticles with various morphologies such as nanorods, nanogranules, nanoblocks, and nanospheres. W dopants are successfully implanted in VO2(M/R) unit cells with high doping efficiency, which allows to regulate the size, morphology, and phase of obtained nanoparticles. The underlying regulation mechanism is presented in detail to reveal how hydrothermal products vary with W doping contents, which provides a synthetic strategy for the preparation of shape-controlling VO2(M/R) nanoparticles with high purity to satisfy different specific demands for corresponding applications in the field of thermochromic smart windows.
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Affiliation(s)
- Yuchao Li
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China
| | - Fengyu Kong
- Ningbo University of Technology, Ningbo, 315211, China
| | - Bin Wang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Yanhua Zhao
- Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China
| | - Zuankai Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China.
- Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China.
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Guan S, Rougier A, Viraphong O, Denux D, Penin N, Gaudon M. Two-Step Synthesis of VO 2 (M) with Tuned Crystallinity. Inorg Chem 2018; 57:8857-8865. [PMID: 30010334 DOI: 10.1021/acs.inorgchem.8b00753] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Highly crystallized monoclinic vanadium dioxide, VO2 (M), is successfully synthesized by a two-step thermal treatment: thermolysis of vanadyl ethylene glycolate (VEG) and postannealing of the poorly crystallized VO2 powder. In the first thermolysis step, the decomposition of VEG at 300 °C is investigated by X-ray diffraction and scanning electron microscopy (SEM). A poorly crystallized VO2 powder is obtained at a strict time of 3 min, and it is found that the residual carbon content in the powder played a critical role in the post crystallization of VO2 (M). After postannealing at 500 and 700 °C in an oxygen-free atmosphere, VO2 particles of various morphologies, of which the crystallite size increases with increasing temperature, are observed by SEM and transmission electron microscopy. The weight percent of crystalline VO2, calculated using the Fullprof program, increases from 44% to 79% and 100% after postannealing. The improved crystallinity leads to an improvement in metal-insulator transition behaviors demonstrated by sharper and more intense differential scanning calorimetry peaks. Moreover, V2O3 and V2O5 with novel and particular microstructures are also successfully prepared with a similar two-step method using postannealing treatment under reductive or oxidizing atmospheres, respectively.
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Affiliation(s)
- Shian Guan
- CNRS, Université de Bordeaux , ICMCB UMR 5026 , Pessac , F-33600 , France
| | - Aline Rougier
- CNRS, Université de Bordeaux , ICMCB UMR 5026 , Pessac , F-33600 , France
| | | | - Dominique Denux
- CNRS, Université de Bordeaux , ICMCB UMR 5026 , Pessac , F-33600 , France
| | - Nicolas Penin
- CNRS, Université de Bordeaux , ICMCB UMR 5026 , Pessac , F-33600 , France
| | - Manuel Gaudon
- CNRS, Université de Bordeaux , ICMCB UMR 5026 , Pessac , F-33600 , France
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Cao X, Thet MN, Zhang Y, Joachim Loo SC, Magdassi S, Yan Q, Long Y. Solution-based fabrication of VO2 (M) nanoparticles via lyophilisation. RSC Adv 2015. [DOI: 10.1039/c4ra16840b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Freeze drying was employed to produce highly pure and crystalline thermochromic VO2 nanoparticles. By changing the precursor concentration and annealing temperature, particle size and crystallinity can be controlled.
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Affiliation(s)
- Xun Cao
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Myat Noe Thet
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Yu Zhang
- Energy Research Institute @ NTU
- Nanyang Technological University
- Singapore
| | - Say Chye Joachim Loo
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
| | - Shlomo Magdassi
- Casali Institute of Applied Chemistry
- The Hebrew University
- Jerusalem
- Israel
| | - Qingyu Yan
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Energy Research Institute @ NTU
- Nanyang Technological University
| | - Yi Long
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
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Ji S, Zhang F, Jin P. Selective formation of VO2(A) or VO2(R) polymorph by controlling the hydrothermal pressure. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.06.029] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Unexpected phase transformation from VO2(R) to VO2(A) during hydrothermal treatment in the V2O5–H2C2O4–H2O system. RESEARCH ON CHEMICAL INTERMEDIATES 2011. [DOI: 10.1007/s11164-011-0290-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kang L, Gao Y, Luo H. A novel solution process for the synthesis of VO2 thin films with excellent thermochromic properties. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2211-2218. [PMID: 20355855 DOI: 10.1021/am900375k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This article describes a novel and simple route to preparing VO(2) thermochromic films by using a VOCl(2) solution with poly(vinylpyrrolidone) (PVP). X-ray diffraction and Raman spectra showed that the VO(2) films deposited with PVP consisted of a nearly pure monoclinic/rutile (M/R) phase. Conversely, films prepared without PVP contained obviously impure crystalline phases. The as-prepared films with PVP showed excellent optical properties compared to those prepared by common gas-phase methods: an integral visible transmittance of 54.5% and an IR reduction (change in transmittance) of 41.5% at 2000 nm. The phase-transition temperatures were adjusted from 69 to 54 degrees C by tungsten doping. Equipment analyses revealed that PVP plays two roles in the film formation. First, it fundamentally acts as a film-forming promoter to improve physical gelation via interactions among oppositely charged carbonyl groups and amine groups of the polymer. Second, the negatively charged carbonyl groups can interact with VO(2+) to form a uniform mixed-gel film after solvent evaporation. Thus, the addition of PVP can stabilize the solution and improve the as-prepared film quality and phase purity. The current study suggests that the process has promise in applications of smart windows.
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Affiliation(s)
- Litao Kang
- Research Center for Industrial Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai 200050, China
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Santulli AC, Xu W, Parise JB, Wu L, Aronson M, Zhang F, Nam CY, Black CT, Tiano AL, Wong SS. Synthesis and characterization of V2O3 nanorods. Phys Chem Chem Phys 2009; 11:3718-26. [DOI: 10.1039/b822902c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Occhiuzzi M, Cordischi D, Dragone R. Reactivity of some vanadium oxides: An EPR and XRD study. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2005.02.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mao Y, Wong SS. General, Room-Temperature Method for the Synthesis of Isolated as Well as Arrays of Single-Crystalline ABO4-Type Nanorods. J Am Chem Soc 2004; 126:15245-52. [PMID: 15548021 DOI: 10.1021/ja046331j] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Single-crystalline BaWO(4) and BaCrO(4) nanorods of reproducible shape and of varying sizes have been controllably prepared using a simple, room-temperature approach, based on the use of porous alumina template membranes. Aligned BaWO(4) and BaCrO(4) nanorod arrays can be obtained by dissolving the template. Our facile technique, which is analogous to biomineralization, offers a promising and generalized methodology to prepare other types of free-standing ABO(4) nanorods and their corresponding nanorod arrays. Extensive characterization of these samples has been performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), selected area electron diffraction (SAED), Raman spectroscopy, FT-infrared spectroscopy (FT-IR), and X-ray diffraction (XRD).
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Affiliation(s)
- Yuanbing Mao
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA
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