Visible Light Induced Oxidation of Trans-ferulic Acid by TiO2 Photocatalysis

Vincenzo Augugliaro, Francesco Parrino, Leonardo Palmisano, Vittorio Loddo, Giovanni Palmisano, Maria Angela Puma, Carlos Márquez-Álvarez, Giovanni Camera-Roda, Camera-Roda, Camera-Roda, María José López-Muñoz, Márquez-Álvarez

Risultato della ricerca: Articlepeer review

41 Citazioni (Scopus)

Abstract

The oxidation of trans-ferulic acid (C 10H 10O 4) in aqueous TiO 2 dispersion occurs via the formation of a charge-transfer complex on the TiO 2 surface that is able to absorb visible light (λ ≥ 400 nm). The main product is CO 2, whereas secondary oxidation products are organic species such as vanillin, caffeic acid, homovanillic acid, and vanillylmandelic acid. Oxidation through the formation of a charge-transfer complex occurs only in the presence of specific TiO 2 samples. Experiments in the absence of oxygen, in the presence of bromate ions and by using a phosphate-modified TiO 2, have been carried out for investigating the reaction mechanism. In order to study the interaction between trans-ferulic acid and TiO 2 surface and to characterize the charge-transfer complex, UV-Vis diffuse reflectance and FT-IR spectroscopies have been used. FT-IR characterization of TiO 2 samples in contact with the aqueous trans-ferulic acid solution indicates that the charge-transfer complex formation occurs via adsorption of bidentate ferulate species.
Lingua originaleEnglish
pagine (da-a)254-260
Numero di pagine7
RivistaJournal of Catalysis
Volume295
Stato di pubblicazionePublished - 2012

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Fingerprint Entra nei temi di ricerca di 'Visible Light Induced Oxidation of Trans-ferulic Acid by TiO2 Photocatalysis'. Insieme formano una fingerprint unica.

Cita questo