The aim of the work was to study the influence of crystallinity and OH surface density on the pho-tocatalytic activity of two commercial and two home-prepared TiO2powders. The samples werecharacterized by X-ray diffraction (XRD), thermogravimetric analysis (TG) and electron paramagneticresonance (EPR) measurements. The photoactivity of the powders was tested employing the photodegra-dation of 4-nitrophenol (4-NP) and the selective oxidation of 4-methoxybenzyl alcohol (4-MBA) to4-methoxybenzaldehyde (p-anisaldehyde) under UV irradiation. An anti-correlation between oxidantpower and selectivity of the various samples was found. A higher rate of 4-NP degradation was exhibitedby the most crystalline commercial samples, whereas the highest selectivity toward the synthesis of p-anisaldehyde was obtained in the presence of the least crystalline and most hydroxylated home-preparedpowders.

Di Paola, A., Bellardita, M., Palmisano, L., Barbierikovà, Z., Brezovà, V. (2014). Influence of crystallinity and OH surface density on the photocatalytic activity of TiO2 powders. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY, 273, 59-67 [10.1016/j.jphotochem.2013.09.008].

Influence of crystallinity and OH surface density on the photocatalytic activity of TiO2 powders

DI PAOLA, Agatino;BELLARDITA, Marianna;PALMISANO, Leonardo;
2014-01-01

Abstract

The aim of the work was to study the influence of crystallinity and OH surface density on the pho-tocatalytic activity of two commercial and two home-prepared TiO2powders. The samples werecharacterized by X-ray diffraction (XRD), thermogravimetric analysis (TG) and electron paramagneticresonance (EPR) measurements. The photoactivity of the powders was tested employing the photodegra-dation of 4-nitrophenol (4-NP) and the selective oxidation of 4-methoxybenzyl alcohol (4-MBA) to4-methoxybenzaldehyde (p-anisaldehyde) under UV irradiation. An anti-correlation between oxidantpower and selectivity of the various samples was found. A higher rate of 4-NP degradation was exhibitedby the most crystalline commercial samples, whereas the highest selectivity toward the synthesis of p-anisaldehyde was obtained in the presence of the least crystalline and most hydroxylated home-preparedpowders.
2014
Settore CHIM/07 - Fondamenti Chimici Delle Tecnologie
Di Paola, A., Bellardita, M., Palmisano, L., Barbierikovà, Z., Brezovà, V. (2014). Influence of crystallinity and OH surface density on the photocatalytic activity of TiO2 powders. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY, 273, 59-67 [10.1016/j.jphotochem.2013.09.008].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/98302
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