The prepn. of polycryst. TiO2 impregnated with a modified Cu(II)-phthalocyanine (TiO2-CuPc) is reported along with a study on the photocatalytic behavior of this system compared with bare TiO2 (both in the anatase and rutile form) and with TiO2 samples impregnated with non-functionalized com. phthalocyanine (TiO2-CuPc) or with metal free phthalocyanine (TiO2-Pc). The photocatalytic degrdn. of 4-nitrophenol was studied as a model. The presence of modified CuPc was beneficial only for TiO2 (anatase) while the com. non-functionalized CuPc was slightly beneficial for both TiO2 (anatase) and TiO2 (rutile). The metal free Pc did not show any beneficial influence on the photoactivity. A tentative explanation of the beneficial effect due to the presence of the Cu(II)-phthalocyanines both on the initial reaction rate and on the mineralization process is provided by taking into account intrinsic electronic and physico-chem. properties.

Photocatalytic Degradation of 4-nitrophenol in aqueous suspension by using polycristalline TiO2 samples impregnated with a Cu(II)-phthalocyanine

MELE, Giuseppe Agostino;CICCARELLA, Giuseppe;VASAPOLLO, Giuseppe;
2002

Abstract

The prepn. of polycryst. TiO2 impregnated with a modified Cu(II)-phthalocyanine (TiO2-CuPc) is reported along with a study on the photocatalytic behavior of this system compared with bare TiO2 (both in the anatase and rutile form) and with TiO2 samples impregnated with non-functionalized com. phthalocyanine (TiO2-CuPc) or with metal free phthalocyanine (TiO2-Pc). The photocatalytic degrdn. of 4-nitrophenol was studied as a model. The presence of modified CuPc was beneficial only for TiO2 (anatase) while the com. non-functionalized CuPc was slightly beneficial for both TiO2 (anatase) and TiO2 (rutile). The metal free Pc did not show any beneficial influence on the photoactivity. A tentative explanation of the beneficial effect due to the presence of the Cu(II)-phthalocyanines both on the initial reaction rate and on the mineralization process is provided by taking into account intrinsic electronic and physico-chem. properties.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11587/111793
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