Photocatalytic activity of TiO2/SiO2 systems

Risultato della ricerca: Article

93 Citazioni (Scopus)

Abstract

Silica-supported TiO2 powders were synthesized by a wet method under mild conditions. The aim of thework was the preparation of TiO2/SiO2 additives for photocatalytic cements. Three types of commercialSiO2 were used as supports: Cabot, Axim and Fly Ash. Cabot silica was ultra-pure whereas the othertwo silica contained different percentages of various oxides. The TiO2/SiO2 samples, denoted TiO2/Cabot,TiO2/Axim and TiO2/Fly Ash, were prepared by boiling suspensions obtained by addition of silica to asolution of TiCl4 in water (volume ratio 1:10). The photocatalytic activity was evaluated in a gas–solidsystem both in batch and in continuous reactors using 2-propanol as probe molecule. SEM-EDX analysisrevealed that titanium dioxide was quantitatively deposited on silica. TiO2/Axim and TiO2/Fly Ash werescarcely active whereas a good photoactivity was exhibited by the TiO2/Cabot sample both in the batchand in the continuous system. Consequently only the last sample was tested for both NOx abatement andfor 4-nitrophenol photodegradation in a liquid–solid system.
Lingua originaleEnglish
pagine (da-a)707-713
Numero di pagine7
RivistaJournal of Hazardous Materials
Volume174
Stato di pubblicazionePublished - 2010

Fingerprint

Silicon Dioxide
Coal Ash
silica
Silica
Fly ash
fly ash
2-Propanol
Photolysis
Photodegradation
Propanol
photodegradation
Powders
Titanium dioxide
Oxides
Boiling liquids
Energy dispersive spectroscopy
Suspensions
Cements
cement
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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Photocatalytic activity of TiO2/SiO2 systems. / Di Paola, Agatino; Marci', Giuseppe; Bellardita, Marianna; Palmisano, Leonardo; Borsa; Cassar; Addamo, Maurizio.

In: Journal of Hazardous Materials, Vol. 174, 2010, pag. 707-713.

Risultato della ricerca: Article

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title = "Photocatalytic activity of TiO2/SiO2 systems",
abstract = "Silica-supported TiO2 powders were synthesized by a wet method under mild conditions. The aim of thework was the preparation of TiO2/SiO2 additives for photocatalytic cements. Three types of commercialSiO2 were used as supports: Cabot, Axim and Fly Ash. Cabot silica was ultra-pure whereas the othertwo silica contained different percentages of various oxides. The TiO2/SiO2 samples, denoted TiO2/Cabot,TiO2/Axim and TiO2/Fly Ash, were prepared by boiling suspensions obtained by addition of silica to asolution of TiCl4 in water (volume ratio 1:10). The photocatalytic activity was evaluated in a gas–solidsystem both in batch and in continuous reactors using 2-propanol as probe molecule. SEM-EDX analysisrevealed that titanium dioxide was quantitatively deposited on silica. TiO2/Axim and TiO2/Fly Ash werescarcely active whereas a good photoactivity was exhibited by the TiO2/Cabot sample both in the batchand in the continuous system. Consequently only the last sample was tested for both NOx abatement andfor 4-nitrophenol photodegradation in a liquid–solid system.",
author = "{Di Paola}, Agatino and Giuseppe Marci' and Marianna Bellardita and Leonardo Palmisano and Borsa and Cassar and Maurizio Addamo",
year = "2010",
language = "English",
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T1 - Photocatalytic activity of TiO2/SiO2 systems

AU - Di Paola, Agatino

AU - Marci', Giuseppe

AU - Bellardita, Marianna

AU - Palmisano, Leonardo

AU - Borsa, null

AU - Cassar, null

AU - Addamo, Maurizio

PY - 2010

Y1 - 2010

N2 - Silica-supported TiO2 powders were synthesized by a wet method under mild conditions. The aim of thework was the preparation of TiO2/SiO2 additives for photocatalytic cements. Three types of commercialSiO2 were used as supports: Cabot, Axim and Fly Ash. Cabot silica was ultra-pure whereas the othertwo silica contained different percentages of various oxides. The TiO2/SiO2 samples, denoted TiO2/Cabot,TiO2/Axim and TiO2/Fly Ash, were prepared by boiling suspensions obtained by addition of silica to asolution of TiCl4 in water (volume ratio 1:10). The photocatalytic activity was evaluated in a gas–solidsystem both in batch and in continuous reactors using 2-propanol as probe molecule. SEM-EDX analysisrevealed that titanium dioxide was quantitatively deposited on silica. TiO2/Axim and TiO2/Fly Ash werescarcely active whereas a good photoactivity was exhibited by the TiO2/Cabot sample both in the batchand in the continuous system. Consequently only the last sample was tested for both NOx abatement andfor 4-nitrophenol photodegradation in a liquid–solid system.

AB - Silica-supported TiO2 powders were synthesized by a wet method under mild conditions. The aim of thework was the preparation of TiO2/SiO2 additives for photocatalytic cements. Three types of commercialSiO2 were used as supports: Cabot, Axim and Fly Ash. Cabot silica was ultra-pure whereas the othertwo silica contained different percentages of various oxides. The TiO2/SiO2 samples, denoted TiO2/Cabot,TiO2/Axim and TiO2/Fly Ash, were prepared by boiling suspensions obtained by addition of silica to asolution of TiCl4 in water (volume ratio 1:10). The photocatalytic activity was evaluated in a gas–solidsystem both in batch and in continuous reactors using 2-propanol as probe molecule. SEM-EDX analysisrevealed that titanium dioxide was quantitatively deposited on silica. TiO2/Axim and TiO2/Fly Ash werescarcely active whereas a good photoactivity was exhibited by the TiO2/Cabot sample both in the batchand in the continuous system. Consequently only the last sample was tested for both NOx abatement andfor 4-nitrophenol photodegradation in a liquid–solid system.

UR - http://hdl.handle.net/10447/52908

M3 - Article

VL - 174

SP - 707

EP - 713

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

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