| 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 60 min 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 6 h of reaction |
| Authors | 1-2) Petronella F., 2-3) Diomede S., 1-2) Fanizza E., 3) Mascolo G., 4) Sibilliano T., 1-2) Agostiano A., 1) Curri L., 3) Comparelli R. |
| Text | 273198 2013 10.1016/j.chemosphere.2013.01.107 ISI Web of Science WOS 000318139500010 PubMed 23466278 Photocatalysis TiO2/Ag nanoparticles Antibiotics Fluoroquinolone Nalidixic acid Recalcitrant pollutants Photodegradation of Nalidixic Acid assisted by TiO2 nanorods/Ag nanoparticles based catalyst 1 2 Petronella F., 2 3 Diomede S., 1 2 Fanizza E., 3 Mascolo G., 4 Sibilliano T., 1 2 Agostiano A., 1 Curri L., 3 Comparelli R. 1 CNR IPCF, Istituto per i Processi Chimici e Fisici, Sez. Bari, c/o Dip. Chimica Via Orabona 4, 70126 Bari, Italy 2 Universita degli Studi di Bari, Dip. Chimica, Via Orabona 4, 70126 Bari, Italy 3 CNR IRSA, Istituto di Ricerca sulle Acque, Via F. De Blasio 5, 70123 Bari, Italy 4 CNR IC, Istituto di Cristallografia, via Amendola 122/O, 70126 Bari, Italy 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 60 min 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 6 h of reaction 91 Articolo in rivista Elsevier 0045 6535 Chemosphere Chemosphere Chemosphere Chemosphere. Chemosphere. Environmental chemistry, Chemosphere. Persistent organic pollutants and dioxins, Chemosphere. Environmental toxicology and risk assessment, Chemosphere. Science for Environmental toxicology, FANIZZA ELISABETTA angela.agostiano AGOSTIANO ANGELA DIOMEDE SARA francesca.petronella PETRONELLA FRANCESCA teresa.sibillano SIBILLANO TERESA marialucia.curri CURRI MARIA LUCIA roberto.comparelli COMPARELLI ROBERTO giuseppe.mascolo MASCOLO GIUSEPPE LIMPID Nanocomposite materials for photocatalytic degradation of pollutants PM.P04.011.002 Imaging a raggi X e algoritmi di ricostruzione della fase MD.P01.022.001 Materiali nanostrutturati e molecole biologiche per strutture organizzate TA.P07.002.006 Trattamenti avanzati di ossidazione |
