Nanocomposites of SnO2 and g-C3N4: Preparation, characterization and photocatalysis under visible LED irradiation

摘要

Tin dioxide nanoparticles were prepared in the presence of graphitized carbon nitride (g-C3N4) forming nano composites with different contents of SnO2 up to 40 %. G-C3N4 was synthetized by heating of melamine at 550 degrees C in the open air and Sn2+ ions were precipitated by sodium hydroxide in g-C3N4 aqueous dispersions. Resulting mixtures were dried by freezing at -20 degrees C and calcined at 450 degrees C to obtain SnO2/g-C3N4 nanocomposites.