Controllable synthesis of VO<sub>2</sub>(D) and their conversion to VO<sub>2</sub>(M) nanostructures with thermochromic phase transition properties

Song, Zigen; Zhang, Liangmiao; Xia, Fang; Webster, Nathan A. S.; Song, Jingchao; Liu, Bin; Luo, Hongjie; Gao, Yanfeng

doi:10.1039/c6qi00102e

Cited by 57 publications

(43 citation statements)

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“…TEM in Figure d shows the microspheres possess a yolk–shelled structure, with a shell of about 100 nm thickness and a spherical core of about 400 nm in diameter. VO 2 (D) with some special shapes, such as nano‐dodecahedra, walnut‐like, and cucumber‐like morphologies was reported by Gao et al By in situ powder XRD measurement, they confirmed a higher reaction temperature or longer hydrothermal time is beneficial for the formation of VO 2 (D), which can be transformed to VO 2 (M) after being annealed at 250–600 °C. Li et al prepared high‐yield VO 2 (D) nanoparticles on kilogram scale by a 50L hydrothermal autoclave (Figure e,h) .…”

Section: Hydrothermal Combined Thermal Treatment Synthesis Of Vo2(m)mentioning

confidence: 73%

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: Hydrothermal Combined Thermal Treatment Synthesis Of Vo2(m)mentioning

confidence: 73%

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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“…3(a) illustrated that the VO 2 (M) nanopowders revealed a thermal hysteresis phenomenon with a width of 4.9 C, which was narrower than the results reported in the literature. 28,29 This may be caused by the interface effects. 30 The heating of the VO 2 (M) nanopowders was accompanied by endothermal effects at 67.2 C in the DSC curves, corresponding to the transition temperature of VO 2 from the monoclinic phase VO 2 (M) to the tetragonal phase VO 2 (R) (see schematic in Fig.…”

Section: Resultsmentioning

confidence: 99%

Infrared thermochromic properties of monoclinic VO₂ nanopowders using a malic acid-assisted hydrothermal method for adaptive camouflage

Liu

Cheng

et al. 2017

RSC Adv.

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“…In addition, VO 2 also possesses different polymorphisms, including VO 2 (A), [6] VO 2 (B), [7,8] VO 2 (D), [9] VO 2 (M), [10] VO 2 (R), [11] and VO 2 (P). In addition, VO 2 also possesses different polymorphisms, including VO 2 (A), [6] VO 2 (B), [7,8] VO 2 (D), [9] VO 2 (M), [10] VO 2 (R), [11] and VO 2 (P).…”

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Development of VO₂‐Nanoparticle‐Based Metal–Insulator Transition Electronic Ink

Vaseem

Yang

et al. 2019

Adv Elect Materials

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phase-change temperature. In addition, VO 2 also possesses different polymorphisms, including VO 2 (A), [6] VO 2 (B), [7,8] VO 2 (D), [9] VO 2 (M), [10] VO 2 (R), [11] and VO 2 (P). [12] Among them, the VO 2 monoclinic (M) phase is the most attractive due to its MIT behavior at a relatively low temperature of 68 °C. [13] However, the simultaneous creation of polymorphs results in a mixture phase and makes it extremely difficult to achieve a pure VO 2 (M) phase. The MIT temperature of VO 2 (M) can also be further reduced by doping [14] and by varying the particle sizes. [10,12] This makes VO 2 a promising material for many practical applications, including sensors, [15] thermochromic smart windows, [16] field effect transistors, [17] radio-frequency (RF) switches, [18] terahertz nanoantennas, [19] reconfigurable antennas, [20] memory, [21] and energy. [22,23] Due to the exciting applications mentioned above, considerable effort has been devoted to producing VO 2 (M) in the form of a thin film, primarily with a dry vapor process using chemical vapor deposition, [24] sputtering, [25] metalorganic molecular beam epitaxy deposition, [26] pulsed laser deposition, [27,28] e-beam evaporation, [29] and by electric field inducing ions migration. [30] On the other hand, several bulk nanomaterials in solution processes with different shapes and sizes using sol-gel [31] and hydrothermal synthesis [32] are reported. The VO 2 thin-film deposition techniques using dry vapor processes require an ultrahigh level of vacuum conditions (10 −6 Torr) and sometimes very high processing temperatures (400-600 °C). The process also requires expensive masks and nanolithography for device prototyping. However, the solution-based VO 2 preparation processes are the simplest, require lower processing temperatures, and are highly scalable. Among the solution-based processes, hydrothermal synthesis is the most widely adopted technique due to its high-quality and purephase VO 2 nanomaterial production. [5] The only disadvantage of hydrothermal synthesis is the longer reaction time required, up to 2-4 d, to achieve pure VO 2 (M). For practical applications, VO 2 (M) nanostructures must be deposited in the form of films. Spin coating is one technique to realize VO 2 films, but large-area processing and direct patterning are not possible. [31] With the surge in inkjet printing, which is extremely low cost, completely digital, and highly suitable for rapid prototyping or large-scale manufacturing, realizing VO 2 film through inkjet The metal-insulator transition (MIT) phase change of vanadium dioxide (VO 2 ) materials has facilitated many exciting applications. Among the various crystal phases of VO 2 , the monoclinic (M) phase is the only one that demonstrates low-temperature (≈68 °C) MIT behavior. However, the synthesis of pure VO 2 (M) is challenging because various polymorphs, such as VO 2 (A), VO 2 (B), and VO 2 (D), are also typically formed during the process. Furthermore, to achieve pure crystalline VO 2 (M) phase, very long reaction times, up...

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Controllable synthesis of VO₂(D) and their conversion to VO₂(M) nanostructures with thermochromic phase transition properties

Abstract: VO2(M) nanostructures with lower thermochromic phase transition temperature and narrower thermal hysteresis width were synthesized by a hydrothermal-calcination method, making them suitable candidates for smart windows.

Cited by 57 publications

References 51 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

Infrared thermochromic properties of monoclinic VO₂ nanopowders using a malic acid-assisted hydrothermal method for adaptive camouflage

Development of VO₂‐Nanoparticle‐Based Metal–Insulator Transition Electronic Ink

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Controllable synthesis of VO2(D) and their conversion to VO2(M) nanostructures with thermochromic phase transition properties

Abstract: VO2(M) nanostructures with lower thermochromic phase transition temperature and narrower thermal hysteresis width were synthesized by a hydrothermal-calcination method, making them suitable candidates for smart windows.

Cited by 57 publications

References 51 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

Infrared thermochromic properties of monoclinic VO2 nanopowders using a malic acid-assisted hydrothermal method for adaptive camouflage

Development of VO2‐Nanoparticle‐Based Metal–Insulator Transition Electronic Ink

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Controllable synthesis of VO₂(D) and their conversion to VO₂(M) nanostructures with thermochromic phase transition properties

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

Infrared thermochromic properties of monoclinic VO₂ nanopowders using a malic acid-assisted hydrothermal method for adaptive camouflage

Development of VO₂‐Nanoparticle‐Based Metal–Insulator Transition Electronic Ink