Issue 12, 2010

Self-assembly and synthesis mechanism of vanadium dioxide hollow microspheres

Abstract

Rutile vanadium dioxide (VO2 (R)) hollow spheres with nanorods aggregating on their surface were successfully synthesized through a novel surfactant-assisted hydrothermal process in which polyvinylpyrrolidone (PVP) served as a soft template. The crystal structure and morphology were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Hollow spheres show an obvious Mott phase transition at 63.0 (heating semicycle) and 53.1 °C (cooling semicycle). Reaction conditions influencing the synthesis of these VO2 hollow spherical structures (i.e., reaction temperature, time and PVP addition amount) were investigated. Furthermore, a mechanism for the growth of the VO2 hollow spheres is proposed.

Graphical abstract: Self-assembly and synthesis mechanism of vanadium dioxide hollow microspheres

Article information

Article type
Communication
Submitted
20 Jun 2010
Accepted
14 Aug 2010
First published
07 Sep 2010

CrystEngComm, 2010,12, 4048-4051

Self-assembly and synthesis mechanism of vanadium dioxide hollow microspheres

C. Cao, Y. Gao, L. kang and H. Luo, CrystEngComm, 2010, 12, 4048 DOI: 10.1039/C0CE00321B

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