Abstract
VO2 nanoparticles with a dimension of approximately 20nm were obtained by simple mechanical bead-milling method, which were well dispersed in transparent silica-alumina (Si-Al) gel matrix to form nanocomposites. The VO2/Si-Al gel thermochromic nanocomposite foils were fabricated with various VO2 solid contents and foil thickness. With 10% VO2 loading and 3μm foil thickness, high luminous transmittance (Tlum(20°C)=63.7% and Tlum(90°C)=54.4%), and large solar modulation ability (δTsol=12%) can be obtained which surpasses the best reported results (nanoporous films:Tlum(20°C)=43.3%, Tlum(90°C)=39.9% and δTsol=14.1%). This current approach provided a simple and scalable preparation method with the best combined thermochromic performance.
Original language | English |
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Pages (from-to) | 49-53 |
Number of pages | 5 |
Journal | Journal of Colloid and Interface Science |
Volume | 427 |
DOIs | |
State | Published - 1 Aug 2014 |
Bibliographical note
Funding Information:This research was supported by the Singapore National Research Foundation under CREATE program: Nanomaterials for Energy and Water Management. The electron microscopy and XRD work were performed at the Facility for Analysis, Characterization, Testing and Simulation (FACTS) in Nanyang Technological University, Singapore.
Keywords
- Mechanical bead milling
- Nanocomposite
- Nanoparticle
- Nanothermochromic
- Smart window
- Sol-gel
- Vanadium dioxide