title: Photodegradation of nalidixic acid assisted by TiO(2) nanorods/Ag nanoparticles based catalyst.
abstract: Two different nanosized TiO2-based catalysts supported onto glass with tailored photocatalytic properties upon irradiation by UV light were successfully employed for the degradation of nalidixid acid, a widely diffused antibacterial agent of environmental relevance known to be non-biodegradable. Anatase rod-like TiO2 nanocrystals (TiO2NRs) and a semiconductor oxide-noble metal nanocomposite TiO2 NRs/Ag nanoparticles (NPs), synthesized by colloidal chemistry routes, were cast onto glass slide and employed as photocatalysts. A commercially available catalyst (TiO2 P25), also immobilized onto a glass slide, was used as a reference material. It was found that both TiO2 NRs/Ag NPs composite and TiO2 NRs demonstrated a photocatalytic efficiency significantly higher than the reference TiO2 P25. Specifically, TiO2 NRs/Ag NPs showed a photoactivity in nalidixic acid degradation 14 times higher than TiO2 P25 and 4 times higher than bare TiO2 NRs in the first 60min of reaction. Several by-products were identified by HPLC-MS along the nalidixic acid degradation, thus getting useful insight on the degradation pathway. All the identified by-products resulted completely removed after 6h of reaction.
authors: CNR-IPCF, Istituto per i Processi Chimici e Fisici, Sez. Bari, c/o Dip. Chimica Via Orabona 4, 70126 Bari, Italy.
authors: F
authors: F
authors: Petronella
authors: S
authors: S
authors: Diomede
authors: E
authors: E
authors: Fanizza
authors: G
authors: G
authors: Mascolo
authors: T
authors: T
authors: Sibillano
authors: A
authors: A
authors: Agostiano
authors: M L
authors: ML
authors: Curri
authors: R
authors: R
authors: Comparelli
mesh_terms: D004785:Environmental Pollutants / Q000737:chemistry*; D008956:Models, Chemical; D009268:Nalidixic Acid / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D010782:Photolysis; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; C009495:titanium dioxide; D009268:Nalidixic Acid; D012834:Silver; D014025:Titanium