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1586344 
Journal Article 
ZnO/TiO2 SEMICONDUCTOR NANOCOMPOSITES. PHOTOCATALYTIC TESTS 
Silva, SS; Magalhaes, F; Sansiviero, MTC 
2010 
1 
Química Nova
ISSN: 0100-4042
EISSN: 1678-7064 
33 
1 
85-U100 
WOS:000274726800016 
ZnO/TiO2 SEMICONDUCTOR NANOCOMPOSITES. PHOTOCATALYTIC TESTS.
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. 
semiconductor nanocomposites; photocatalysis; Raman spectroscopy