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

Leonardo Palmisano, Agatino Di Paola, Marianna Bellardita, Zuzana Barbieriková, Vlasta Brezová, Agatino Di Paola, Leonardo Palmisano

Risultato della ricerca: Articlepeer review

64 Citazioni (Scopus)

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.
Lingua originaleEnglish
pagine (da-a)59-67
Numero di pagine9
RivistaJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY
Volume273
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.1500.1500???
  • ???subjectarea.asjc.3100.3100???

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