title: Urban biowaste-derived sensitizing materials for caffeine photodegradation.
abstract: Caffeine-photosensitized degradation has been studied in the presence of bio-based materials derived from urban biowaste after aerobic aging. A peculiar fraction (namely bio-based substances (BBSs)), soluble in all the pH range, has been used as photosensitizing agent. Several caffeine photodegradation tests have been performed, and positive results have been obtained in the presence of BBSs and H2O2, without and with additional Fe(II) (photo-Fenton-like process). Moreover, hybrid magnetite-BBS nanoparticles have been synthesized and characterized, in order to improve the sensitizer recovery and reuse after the caffeine degradation. In the presence of such nanoparticles and H2O2and Fe(II), the complete caffeine degradation has been attained in very short time. Both homogeneous and heterogeneous processes were run at pH = 5, milder condition compared to the classic photo-Fenton process.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy. alessandra.biancoprevot@unito.it.
authors.forename: A
authors.initials: A
authors.lastname: Bianco Prevot
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Baino
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Fabbri
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Franzoso
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.|NIS Centre, Via Giuria 7, Torino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Magnacca
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Nisticò
authors.affiliation: Dpto de Ingeniería Textil y Papelera, Universitat Politècnica de València, Plaza Ferrándiz y Carbonell s/n, Alcoy, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Arques
mesh_terms: D002110:Caffeine; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D010782:Photolysis; D014874:Water Pollutants, Chemical
chemical_list: D014874:Water Pollutants, Chemical; D002110:Caffeine; D006861:Hydrogen Peroxide; D007501:Iron
keywords: Bio-based substances; Caffeine photodegradation; Fenton; Photo-Fenton, magnetic nanoparticles; Urban waste