Open AccessINFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO2
Author(s) -
Maria T. C. Sansiviero,
Dalva Lúcia Araújo de Faria
Publication year - 2014
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.5935/0100-4042.20140267
Subject(s) - nanocomposite , photocatalysis , materials science , thermal , chemical engineering , nanotechnology , chemistry , physics , catalysis , organic chemistry , engineering , meteorology
ZnO/TiO2 nanocomposites were prepared by impregnating zinc acetate dihydrate on the surface of titanium dioxide P25, followed by thermal treatment at 350, 600, 750, and 900 °C, in order to investigate the TiO2 phase and titanate formation and the role of the latter in the photocatalytic activity of the nanocomposite. In the nanocomposites, the anatase-to-rutile transition is favored due to the presence of Zn2+, and the conversion is nearly complete at 750 °C. The presence of zinc metatitanate in the sample heated at 600 °C had no significant effect on the nanocomposite photocatalytic activity