Issue 14, 2014

Highly dispersed SrTiO3 nanocubes from a rapid sol-precipitation method

Abstract

SrTiO3 nanocubes and their hyperstable nanocrystalline sols were synthesized by a rapid sol-precipitation method under atmospheric pressure. Using triethylene glycol (TEG) to control the hydrolysis rate of tetrabutyl titanate, the SrTiO3 nanocrystalline sol was obtained in as little time as 2 h. The formation kinetics of the SrTiO3 nanocubes indicated that controlled hydrolysis is critical to the generation of a well defined cubic shape. The Fourier transform infrared (FT-IR) spectrum confirms the existence of TEG molecules on the surface of the particles and explains the high dispersion of the nanocubes in polar solvents. Owing to the large specific surface area (99.065 m2 g−1), cubic SrTiO3 nanocrystals showed enhanced photocatalytic activity. A high-quality SrTiO3 nanocrystal film was prepared by spin-coating of the hyperstable sol at 100–160 °C, providing a new low-temperature route for the fabrication of perovskite thin films.

Graphical abstract: Highly dispersed SrTiO3 nanocubes from a rapid sol-precipitation method

Article information

Article type
Paper
Submitted
10 Jan 2014
Accepted
30 Apr 2014
First published
06 May 2014

Nanoscale, 2014,6, 7940-7946

Highly dispersed SrTiO3 nanocubes from a rapid sol-precipitation method

Y. Hao, X. Wang and L. Li, Nanoscale, 2014, 6, 7940 DOI: 10.1039/C4NR00171K

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