Home-prepared anatase, rutile, and brookite TiO2 for selective photocatalytic oxidation of 4-methoxybenzyl alcohol in water: reactivity and ATR-FTIR study

Vincenzo Augugliaro; Vittorio Loddo; María José López-Muñoz; Carlos Márquez-Álvarez; Giovanni Palmisano; Leonardo Palmisano; Sedat Yurdakal

doi:10.1039/B818353H

Home-prepared anatase, rutile, and brookite TiO₂ for selective photocatalytic oxidation of 4-methoxybenzyl alcohol in water: reactivity and ATR-FTIR study†‡

Vincenzo Augugliaro,*^a Vittorio Loddo,^a María José López-Muñoz,^b Carlos Márquez-Álvarez,^c Giovanni Palmisano,^a Leonardo Palmisano*^a and Sedat Yurdakal^ad

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* Corresponding authors

^a “Schiavello-Grillone” Photocatalysis Group, Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Università degli Studi di Palermo, Viale delle Scienze, Palermo, Italy
E-mail: augugliaro@dicpm.unipa.it, palmisano@dicpm.unipa.it
Fax: +3909123863750
Tel: +3909123863722

^b Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, C/Tulipán s/n, Móstoles, Madrid, Spain

^c Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, Cantoblanco, Madrid, Spain

^d Kimya Bölümü, Fen Fakültesi, Anadolu Üniversitesi, Yunus Emre Kampüsü, Eskişehir, Turkey

Abstract

TiO₂ catalysts of anatase, rutile and brookite phase were prepared at low temperature and tested for carrying out the photocatalytic partial oxidation of 4-methoxybenzyl alcohol to 4-methoxybenzaldehyde (p-anisaldehyde) in organic-free water suspensions. Traces of 4-methoxybenzoic acid and open-ring products were the only by-products present, CO₂ being the other main oxidation product. Rutile exhibited the highest yield to p-anisaldehyde (62% mol) at a rate of the same order of magnitude of that showed by the other samples. Commercial rutile and anatase photocatalysts were also used for the sake of comparison. The samples have been characterised by an in situ ATR-FTIR investigation carried out in conditions simulating the photoreaction ones.

This article is part of the themed collection: Solar chemistry and photocatalysis - environmental applications

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Article information

DOI: https://doi.org/10.1039/B818353H
Article type: Paper
Submitted: 16 Oct 2008
Accepted: 18 Feb 2009
First published: 09 Mar 2009

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Photochem. Photobiol. Sci., 2009,8, 663-669

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Home-prepared anatase, rutile, and brookite TiO₂ for selective photocatalytic oxidation of 4-methoxybenzyl alcohol in water: reactivity and ATR-FTIR study

V. Augugliaro, V. Loddo, M. J. López-Muñoz, C. Márquez-Álvarez, G. Palmisano, L. Palmisano and S. Yurdakal, Photochem. Photobiol. Sci., 2009, 8, 663 DOI: 10.1039/B818353H

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Photochemical & Photobiological Sciences