HYDROTHERMAL SYNTHESIS OF SnO2 NANOPOWDERS AND THEIR PHOTOCATALYTIC PROPERTIES
YONG- QING ZHAI *
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
QIAN ZHAO
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
MENG WANG
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
JIA- JIA ZHAO
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
XIAO LIU
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
YAN- MEI LI
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
*Author to whom correspondence should be addressed.
Abstract
Nano-sized SnO2 powders were synthesized by a facile hydrothermal method without using any surfactant. The obtained samples were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-Vis spectrophotometer. To investigate the photocatalytic properties of the samples, Acid Red B was used as simulated dye wastewater. The results indicated that SnO2 possesses tetragonal phase with cell parameters a=b=4.738 Å，c=3.187 Å. The particles of sample are spherical in shape, and the diameter is about 25 nm. The as-synthesized SnO2 powders show excellent photocatalytic activity. When the dosage is 0.4 g/L, UV light is used as irradiation source and reaction time is 120 min, the decolorization rate can reach to 100%.
Keywords: SnO2, nano-sized, hydrothermal method, photocatalytic activity, decolorization rate