Sol-gel processing of VO2 (M) in supercritical CO2 and supercritical CO2/ ionic liquid biphasic system

Nazari, Shidokht; Charpentier, Paul A.

doi:10.1016/j.supflu.2020.104989

Cited by 7 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…VTIP was used as the vanadium precursor while examining [EMIM] ionic liquids based on anions of [TF 2 N]/[TFO]/[AcO]/[ HSO 4 ]. [91] Using scCO 2 /HOAC or using only [EMIM][TF 2 N] IL resulted in a gelation yield of up to 80%, indicating the role of scCO 2 in the gelation process. It is found that the sol-gel temperature has a greater influence on the gelation yield than the pressure.…”

Section: Organic and Inorganic Complex Ionic Liquid Smart Windowsmentioning

confidence: 97%

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Feng

Lv²,

Yang

et al. 2022

Molecules

View full text Add to dashboard Cite

Thermochromic smart windows technology can intelligently regulate indoor solar radiation by changing indoor light transmittance in response to thermal stimulation, thus reducing energy consumption of the building. In recent years, with the development of new energy-saving materials and the combination with practical technology, energy-saving smart windows technology has received more and more attention from scientific research. Based on the summary of thermochromic smart windows by Yi Long research groups, this review described the applications of thermal responsive organic materials in smart windows, including poly(N-isopropylacrylamide) (PNIPAm) hydrogels, hydroxypropyl cellulose (HPC) hydrogels, ionic liquids and liquid crystals. Besides, the mechanism of various organic materials and the properties of functional materials were also introduced. Finally, opportunities and challenges relating to thermochromic smart windows and prospects for future development are discussed.

show abstract

Section: Organic and Inorganic Complex Ionic Liquid Smart Windowsmentioning

confidence: 97%

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Feng

Lv²,

Yang

et al. 2022

Molecules

View full text Add to dashboard Cite

show abstract

“…Various techniques have been investigated for the synthesis of high-purity VO 2 (M), including chemical vapor deposition (CVD), [32][33][34] magnetron sputtering, [35,36] hydrothermal methods, [37][38][39] physical vapor deposition, [40,41] thermolysis, [42,43] and sol-gel techniques. [44,45] Each method produces VO 2 with distinct sizes and morphologies. However, in window applications where transparency is crucial, adjusting the VO 2 particle size becomes essential.…”

Section: Adjust the Particles Sizementioning

confidence: 99%

Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows

Alsaadi,

Lerttraikul,

Chatraphorn

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

Due to the growing need for smart windows for buildings to reduce energy usage, vanadium dioxide (VO2) has been investigated as a potential material for thermochromic smart windows due to its ease of implementation and simplicity in industrial production. VO2 undergoes a reversible phase shift from a monoclinic (M, P21/c) semiconductor to a rutile (R, P42/mnm) metal at a critical temperature of 68 °C. This transition is accompanied by acute variations in IR reflectance, transmittance, and electrical resistance. Despite substantial developments in thermochromic materials, their optical and transition properties are still unsatisfactory. In the past several decades, many methods for enhancing optical properties have been reported, including composite films, multilayer structures, and element doping. Recent developments in thermochromic smart windows to improve both optical properties and durability have been surveyed in this review. Additionally, future growth trends have been provided by the possibility of commercially manufacturing VO2 smart windows.This article is protected by copyright. All rights reserved.

show abstract

“…For example, some authors focused on a simple, low-cost oxidation strategy for developing vanadium dioxide thin films [33], while others have synthesized VO 2 through an easy one-step annealing method [34]. In addition, others have investigated different ways to improve the process using the sol-gel technique, analyzing the importance of several precursors, such as scCO2 and imidazolium ILs, on polycondensation for the formation of vanadium gels [35]. Moreover, other authors have researched the use of different matrices to improve the lifespan of vanadium dioxide (VO 2 ) nanoparticles.…”

Section: Optical Modulation Of Passive Daytime Radiative Coolingmentioning

confidence: 99%

Optically Modulated Passive Broadband Daytime Radiative Cooling Materials Can Cool Cities in Summer and Heat Cities in Winter

et al. 2022

View full text Add to dashboard Cite

Broadband passive daytime radiative cooling (PDRC) materials exhibit sub-ambient surface temperatures and contribute highly to mitigating extreme urban heat during the warm period. However, their application may cause undesired overcooling problems in winter. This study aims to assess, on a city scale, different solutions to overcome the winter overcooling penalty derived from using PDRC materials. Furthermore, a mesoscale urban modeling system assesses the potential of the optical modulation of reflectance (ρ) and emissivity (ε) to reduce, minimize, or reverse the overcooling penalty. The alteration of heat flux components, air temperature modification, ground and roof surface temperature, and the urban canopy temperature are assessed. The maximum decrease of the winter ambient temperature using standard PDRC materials is 1.1 °C and 0.8 °C for daytime and nighttime, respectively, while the ρ+ε-modulation can increase the ambient temperature up to 0.4 °C and 1.4 °C, respectively, compared to the use of conventional materials. Compared with the control case, the maximum decrease of net radiation inflow occurred at the peak hour, reducing by 192.7 Wm−2 for the PDRC materials, 5.4 Wm−2 for ρ-modulated PDRC materials, and 173.7 Wm−2 for ε-PDRC materials; nevertheless, the ρ+ε-modulated PDRC materials increased the maximum net radiation inflow by 51.5 Wm−2, leading to heating of the cities during the winter.

show abstract

Sol-gel processing of VO2 (M) in supercritical CO2 and supercritical CO2/ ionic liquid biphasic system

Cited by 7 publications

References 43 publications

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows

Optically Modulated Passive Broadband Daytime Radiative Cooling Materials Can Cool Cities in Summer and Heat Cities in Winter

Contact Info

Product

Resources

About

Sol-gel processing of VO2 (M) in supercritical CO2 and supercritical CO2/ ionic liquid biphasic system

Cited by 7 publications

References 43 publications

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Application of New Energy Thermochromic Composite Thermosensitive Materials of Smart Windows in Recent Years

Strategies for Enhanced Optical Performance and Durability of VO2‐Based Thermochromic Windows

Optically Modulated Passive Broadband Daytime Radiative Cooling Materials Can Cool Cities in Summer and Heat Cities in Winter

Contact Info

Product

Resources

About

Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows