VO2 nanosheets exhibiting a well-defined metal–insulator phase transition

Whittaker, Luisa; Zhang, Hengsong; Banerjee, Sarbajit

doi:10.1039/b823332b

Cited by 59 publications

(78 citation statements)

References 35 publications

(53 reference statements)

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“…Compared with other approaches, nanothermochromic (the oval line marked in Figure a,b), which is to mix VO 2 nanoparticles with a glass or polymer matrix, has the optimum performance from both experiment data and theoretical results . Moreover, scaling VO 2 particles to nanoscale offers the possibility to further enhance its thermochromic performance at a moderate τ c . Several chemical and physical techniques have been reported to construct nanostructures of thermochromic VO 2 , including hydrothermal, magnetron sputtering, CVD, PVD, sol–gel, confined‐space combustion method, electrochemical and solution methods .…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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Vanadium dioxide (VO ) is a widely studied inorganic phase change material, which has a reversible phase transition from semiconducting monoclinic to metallic rutile phase at a critical temperature of τ ≈ 68 °C. The abrupt decrease of infrared transmittance in the metallic phase makes VO a potential candidate for thermochromic energy efficient windows to cut down building energy consumption. However, there are three long-standing issues that hindered its application in energy efficient windows: high τ , low luminous transmittance (T ), and undesirable solar modulation ability (ΔT ). Many approaches, including nano-thermochromism, porous films, biomimetic surface reconstruction, gridded structures, antireflective overcoatings, etc, have been proposed to tackle these issues. The first approach-nano-thermochromism-which is to integrate VO nanoparticles in a transparent matrix, outperforms the rest; while the thermochromic performance is determined by particle size, stoichiometry, and crystallinity. A hydrothermal method is the most common method to fabricate high-quality VO nanoparticles, and has its own advantages of large-scale synthesis and precise phase control of VO . This Review focuses on hydrothermal synthesis, physical properties of VO polymorphs, and their transformation to thermochromic VO (M), and discusses the advantages, challenges, and prospects of VO (M) in energy-efficient smart windows application.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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295

185

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“…Until now, many methods have been developed to synthesize VO 2 . Among those approaches, probably vanadium pentoxide (V 2 O 5 ) is the most used raw materials.…”

Section: Introductionmentioning

confidence: 99%

“…Among those approaches, probably vanadium pentoxide (V 2 O 5 ) is the most used raw materials. V 2 O 5 can be reduced into VO 2 in solutions with reducing agents (e.g., H 2 C 2 CO 4 , N 2 H 4 , alcohols, amine) under hydrothermal/solvothermal conditions, or in a reductive atmosphere at a high temperature . V 2 O 5 is a kind of layered compound, which comprises layers of VO 5 square pyramids sharing edges and corners.…”

Section: Introductionmentioning

confidence: 99%

Deoxidization of V₂O₅ Powder into VO₂ Assisted by an Electrochemical Lithium Intercalation Technique

Chen

Liu

Chen

et al. 2012

Int J Applied Ceramic Tech

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This article demonstrates a method to fabricate VO 2 powder by annealing a precursor that was obtained by electrochemical intercalation of lithium into layered structured V 2 O 5 . The method includes three steps. First, Li + was intercalated into interlayers of V 2 O 5 through an electrochemical process with precisely controlled electrical discharging currents and intercalation amounts, and at the same time V 5+ would be deoxidized into V 4+ . Secondly, the Li + -intercalated powder was rinsed in an acid solution to achieve an ion exchanging process of replacing the Li + in the V-O frame with H + . Thirdly, the powder was annealed at 800°C in N 2 atmosphere for dehydration and VO 2 crystallization. By DSC investigation, the as-produced final product has a strong endothermic peak at around 68°C in a heating semicycle, which is indicative of the phase transition from VO 2 (M) to VO 2 (R). This approach can be extended to the fabrication of other sub-valence oxides by lithium intercalation and deoxidization of its higher valence layer-structured precursors.

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“…Nowadays, a new cubic crystal structure for VO 2 nanorods with a large optical band gap of 2.7 eV has been reported by Wang et al, which surprisingly shows excellent photocatalytic activity in hydrogen production and shows good field emission properties [2,5]. The recently observed rate of publications based on the new morphology of VO 2 , including one-dimensional (1D) nanostructures such as nanorods [9], nanoribbons [10], nanobelts [8,11], nanowires [12] or two dimensional (2D) lamellar or sheet-like nanostructures [7,[13][14][15], is demonstrating that the unusual morphology based on the VO 2 system is a rule rather than an exception. Unfortunately, the attractive synthesis of nanostructured VO 2 with unusual properties requires a relatively complicated process control and in many cases, time consuming hydrothermal conditions are required [7-10, 12, 14, 15].…”

Section: Introduction Pr Ex Dmentioning

confidence: 99%

Synthesis and Transport Properties of Nanostructured VO2 by Mechanochemical Processing

Billik¹,

Čaplovičová²,

Manka³

et al. 2011

Measurement Science Review

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The high-energy milling of the V 2 O 5 -Na 2 SO 3 mixture in the range of 5 -100 min leads to a synthesis of monoclinic VO 2 . The starting and minimum (at 220 °C) values of electric resistance R of the 100 min milled and pressed VO 2 -Na 2 SO 4 mixture were 13.9 MΩ and 91.5 kΩ, respectively. The subsequent washing of the as-milled powder partially leads to the development of VO 2 nanostructures with tube-like, sheet-like and rod-like morphology, besides VO 2 (B) belt-like morphology, depending on the milling times.

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VO2 nanosheets exhibiting a well-defined metal–insulator phase transition

Cited by 59 publications

References 35 publications

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Deoxidization of V₂O₅ Powder into VO₂ Assisted by an Electrochemical Lithium Intercalation Technique

Synthesis and Transport Properties of Nanostructured VO2 by Mechanochemical Processing

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VO2 nanosheets exhibiting a well-defined metal–insulator phase transition

Cited by 59 publications

References 35 publications

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Deoxidization of V2O5 Powder into VO2 Assisted by an Electrochemical Lithium Intercalation Technique

Synthesis and Transport Properties of Nanostructured VO2 by Mechanochemical Processing

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Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Deoxidization of V₂O₅ Powder into VO₂ Assisted by an Electrochemical Lithium Intercalation Technique