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metadata.artigo.dc.title: Nanocompósitos semicondutores ZnO/TiO2. Testes fotocatalíticos
metadata.artigo.dc.title.alternative: ZnO/TiO2 semiconductor nanocomposites. Photocatalytic tests
metadata.artigo.dc.creator: Silva, Shirley Santana
Magalhães, Fabiano
Sansiviero, Maria Terezinha C.
metadata.artigo.dc.subject: semiconductor nanocomposites
Raman spectroscopy
Nanocompósitos de semicondutores
Espectroscopia Raman
metadata.artigo.dc.publisher: Sociedade Brasileira de Química 2010
metadata.artigo.dc.identifier.citation: SILVA, S. S.; MAGALHÃES, F.; SANSIVIERO, M. T. C. Nanocompósitos semicondutores ZnO/TiO2. Testes fotocatalíticos. Química Nova, São Paulo, v. 33, n. 1, p. 85-89, 2010.
metadata.artigo.dc.description.abstract: Titanium dioxide is an efficient photocatalist, being possible to improve its efficiency with better charge separation which occurs when it is coupled with other semiconductors. Nanometric particles of ZnO were used to impregnate TiO2 P25 in order to optimize its photocatalytic properties. ZnO/TiO2 composites were obtained at different proportions and were characterized by X-ray diffraction (XRD), micro-Raman and diffuse reflectance spectroscopies, measurement of surface area (BET) and scanning electron microscopy (SEM). Raman spectroscopy data revealed a change on the TiO2 surface due the presence of ZnO which was observed by an enlargement of TiO2 peaks and a change on the relation rate between anatase and rutile phases of the composites. The photodegradation of azo-dye Drimaren red revealed better efficiency for ZnO/TiO2 3% nanocomposite and for ZnO pure.
metadata.artigo.dc.language: pt_BR
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