Acessibilidade / Reportar erro
Artigo • Quím. nova 38 (1) • Jan 2015 • https://doi.org/10.5935/0100-4042.20140267   copiar

INFLUÊNCIA DO TRATAMENTO TÉRMICO NO NANOCOMPÓSITO FOTOCATALISADOR ZnO/TiO2

INFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO2

Autoria SCIMAGO INSTITUTIONS RANKINGS

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.

TiO2; nanocomposites; zinc metatitanate

Sociedade Brasileira de Química Secretaria Executiva, Av. Prof. Lineu Prestes, 748 - bloco 3 - Superior, 05508-000 São Paulo SP - Brazil, C.P. 26.037 - 05599-970, Tel.: +55 11 3032.2299, Fax: +55 11 3814.3602 - São Paulo - SP - Brazil
E-mail: quimicanova@sbq.org.br
Acompanhe os números deste periódico no seu leitor de RSS