PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES (Articolo in rivista) (literal)

Anno

• 2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.apcatb.2004.07.011 (literal)

Alternative label

• COMPARELLI R., FANIZZA E., CURRI M.L., COZZOLI P.D., MASCOLO G., PASSINO R., AGOSTIANO A. (2005)
  PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES
  in Applied catalysis. B, Environmental (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• COMPARELLI R., FANIZZA E., CURRI M.L., COZZOLI P.D., MASCOLO G., PASSINO R., AGOSTIANO A. (literal)

Pagina inizio

• 81 (literal)

Pagina fine

• 91 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 55 (literal)

Rivista

• Applied catalysis. B, Environmental (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 2 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• CNR IPCF CNR IRSA UNI BA (literal)

Titolo

• PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES (literal)

Abstract

• The UV-induced photocatalytic degradation of two azo dyes, Methyl Red and Methyl Orange, has been carried out in aqueous media in the presence of oleic acid (OLEA)- and tri-n-octylphosphine oxide (TOPO)-capped anatase TiO2 nanocrystal powders (mean particle size: 6 nm) deposited onto a quartz substrate. The progress of photodegradation was followed by combining UV-vis absorption measurements with HPLC-MS analysis. The abatement efficiency for the two organic compounds was compared with that obtained with commercial TiO2 P25 Degussa by evaluating a few significant variables, such as the dye chemical structure, pH of the solution, and catalyst surface status. Identification of several by-products by HPLC-MS analysis has allowed to propose a reasonable degradation pathway for both target molecules. Significantly, although all titania catalysts were effective in removing both parent dyes and their related derivatives, the degradation rate by the OLEA-capped TiO2 nanocrystals was double as that obtained with both its TOPO-capped analogous and TiO2 P25 Degussa. It is suggested that efficient catalysis strictly depends on microscopic mechanisms that occur at the catalyst surface, basically involving specific dye adsorption and local density of terminal -OH moieties. (literal)

Prodotto di

• Materiali nanostrutturati e molecole biologiche per strutture organizzate (MD.P01.022.001) (Modulo)
• Water research institute (IRSA) (Istituto)
• Sviluppo di nuovi processi di controllo dell'inquinamento idrico. (TA.P07.002.002) (Modulo)
• Istituto per i processi chimico-fisici (IPCF) (Istituto)

Autore CNR

• GIUSEPPE MASCOLO (Unità di personale interno)
• ROBERTO PASSINO (Persona)
• MARIA LUCIA CURRI (Unità di personale interno)
• ROBERTO COMPARELLI (Persona)

Insieme di parole chiave

• Keywords of "PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Water research institute (IRSA) (Istituto)
• Materiali nanostrutturati e molecole biologiche per strutture organizzate (MD.P01.022.001) (Modulo)
• Sviluppo di nuovi processi di controllo dell'inquinamento idrico. (TA.P07.002.002) (Modulo)

Autore CNR di

• MARIA LUCIA CURRI (Unità di personale interno)
• ROBERTO COMPARELLI (Persona)
• GIUSEPPE MASCOLO (Unità di personale interno)
• ROBERTO PASSINO (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Applied catalysis. B, Environmental (Rivista)

Insieme di parole chiave di

• Keywords of "PHOTOCATALYTIC DEGRADATION OF AZO DYES BY ORGANIC-CAPPED ANATASE TIO2 NANOCRYSTALS IMMOBILIZED ONTO SUBSTRATES" (Insieme di parole chiave)