title: Preparation and characterization of self-supporting thermochromic films composed of VO2(M)@SiO2 Nanofibers.
abstract: Nanofibers of VO2(A) with the diameter and length averagely at 100 nm and 10-20 μm were prepared via a facile one-step hydrothermal method by reducing NH4VO3 with 1,3-propylene glycol in an acidic solution. The obtained VO2(A) was coated by SiO2 to form VO2(A)@SiO2 core-shell nanocomposites, which were then transformed into VO2(M)@SiO2 by annealing under nitrogen atmosphere. The resulted composites maintained the original fibrous morphology, particularly with a large amount of pores emerging inside the fiber due to the volume shrinkage during the phase transition, which may improve its thermal insulation ability in real applications. The VO2(M)@SiO2 nanofibers were arranged into a self-supporting film by filtration, which shows excellent thermochromic properties.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Shaotang
authors.initials: S
authors.lastname: Li
authors.forename: Yamei
authors.initials: Y
authors.lastname: Li
authors.forename: Meng
authors.initials: M
authors.lastname: Jiang
authors.forename: Shidong
authors.initials: S
authors.lastname: Ji
authors.forename: Hongjie
authors.initials: H
authors.lastname: Luo
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Gao
authors.forename: Ping
authors.initials: P
authors.lastname: Jin