Controllable preparation of SnO2 nanoplates and nanoparticles via hydrothermal oxidation of SnS2 nanoplates

A facile hydrothermal oxidation route has been proposed for the controllable preparation of SnO2 nanoplates and nanoparticles, using the home-made SnS2 nanoplates as a precursor. It was found that the temperature played an important role in the microstructures of the obtained products. While nanoplates of tetragonal phase SnO2 were synthesized via hydrothermal treatment of the SnS2 nanoplates in 15 vol.% H2O2 aqueous solution at 180 degrees C for 24 h, only nanoparticles of tetragonal phase SnO2 could be obtained via hydrothermal treatment of the SnS2 nanoplates in 15 vol.% H2O2 aqueous solution at 200 degrees C for 24 h. The as-prepared products were characterized by means of X-ray diffraction, field emission scanning electron microscope, and Raman spectra, and their possible formation mechanisms were also discussed. (C) 2009 Elsevier B.V. All rights reserved.