Hydrothermal Synthesis and Characterization of Flower-like SnO2-Zn2SnO4 Nanocomposites

摘要

Flower-like SnO2-Zn2SnO4 nanocomposites were prepared via a simple hydrothermal process. X-ray diffraction patterns show that as-prepared sample is the composite of SnO2 and Zn2SnO4. Transmission electronmicroscopy characterizations confirm that the morphologies of SnO2 and Zn2SnO4 nanocomposites are "flower". Photoluminescence measurement of the SnO2-Zn2SnO4 nanocomposites reveals a stable purple emission band centered at ca. 440 run. The influences of the hydrothermal temperature and time, the molar ratio of Zn~(2+) and Sn~(4+) and the concentrations of NaOH have been studied. The possible growth mechanisms of flower-like nanocomposites and the possible reaction process were discussed.