Syntheses of MO2 (M = Si, Ce, Sn) nanoparticles by solid-state reactions at ambient temperature

Nano oxides (SiO2, CeO2, SnO2) were successfully synthesized by solid-state reactions at ambient temperature. The nanoparticles were characterized by X-ray powder diffraction, TEM, BET, and TGA-DTA. The SiO2 particles were al so investigated using IR spectra. Effects of calcination on the nanoparticl es were studied in this paper. The solid-state reaction technique is a conv enient, inexpensive and an effective preparation method of monodisperse oxi de nanoparticles in high yield. The mechanisms of the formation of nano mat erials by solid-state reactions at ambient temperature were primarily inves tigated. (C) 2000 Editions scientifiques et medicales Elsevier SAS. All rig hts reserved.