Photocatalytic Behaviour of Metal Loaded TiO2 Aqueous Dispersions and Films

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Abstract

Titanium dioxide nanoparticles loaded with Ce, Co, Eu, Sm, W and Yb species were prepared by coprecipitation in mild conditionsusing TiCl4 as precursor with the aim to enhance the photocatalytic activity, especially under visible light irradiation. The photocatalystswere characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), specific surface area (SSA) determination and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the powders of pure and loaded TiO2 was investigated by employingthe photodegradation of 4-nitrophenol as probe reaction in a liquid–solid system. Loading with suitable amounts of W, Co and Smresulted in a significant improvement of the photoreactivity of TiO2. This beneficial effect was attributed to an increased separationof the photogenerated electron–hole pairs. Some samples were more photoactive than commercial powders employed in the same experimentalconditions.Films of TiO2 loaded with the metals that yielded the best photocatalytic responses were prepared by the dip-coating technique. Thephotoactivity of the films was tested by evaluating the rate of degradation of 2-propanol in a gas–solid system. An enhancement of thephotocatalytic efficiency was obtained in the presence of W and Sm.
Lingua originaleEnglish
pagine (da-a)94-103
Numero di pagine10
RivistaChemical Physics
Volume339
Stato di pubblicazionePublished - 2007

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Dispersions
Powders
Metals
Photoreactivity
Coating techniques
2-Propanol
Photodegradation
Coprecipitation
titanium oxides
Specific surface area
metals
coating
Irradiation
Spectroscopy
degradation
Nanoparticles
reflectance
X ray diffraction
Degradation
nanoparticles

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cita questo

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title = "Photocatalytic Behaviour of Metal Loaded TiO2 Aqueous Dispersions and Films",
abstract = "Titanium dioxide nanoparticles loaded with Ce, Co, Eu, Sm, W and Yb species were prepared by coprecipitation in mild conditionsusing TiCl4 as precursor with the aim to enhance the photocatalytic activity, especially under visible light irradiation. The photocatalystswere characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), specific surface area (SSA) determination and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the powders of pure and loaded TiO2 was investigated by employingthe photodegradation of 4-nitrophenol as probe reaction in a liquid–solid system. Loading with suitable amounts of W, Co and Smresulted in a significant improvement of the photoreactivity of TiO2. This beneficial effect was attributed to an increased separationof the photogenerated electron–hole pairs. Some samples were more photoactive than commercial powders employed in the same experimentalconditions.Films of TiO2 loaded with the metals that yielded the best photocatalytic responses were prepared by the dip-coating technique. Thephotoactivity of the films was tested by evaluating the rate of degradation of 2-propanol in a gas–solid system. An enhancement of thephotocatalytic efficiency was obtained in the presence of W and Sm.",
author = "{Di Paola}, Agatino and Marianna Bellardita and Leonardo Palmisano and Maurizio Addamo",
year = "2007",
language = "English",
volume = "339",
pages = "94--103",
journal = "Chemical Physics",
issn = "0301-0104",
publisher = "Elsevier",

}

TY - JOUR

T1 - Photocatalytic Behaviour of Metal Loaded TiO2 Aqueous Dispersions and Films

AU - Di Paola, Agatino

AU - Bellardita, Marianna

AU - Palmisano, Leonardo

AU - Addamo, Maurizio

PY - 2007

Y1 - 2007

N2 - Titanium dioxide nanoparticles loaded with Ce, Co, Eu, Sm, W and Yb species were prepared by coprecipitation in mild conditionsusing TiCl4 as precursor with the aim to enhance the photocatalytic activity, especially under visible light irradiation. The photocatalystswere characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), specific surface area (SSA) determination and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the powders of pure and loaded TiO2 was investigated by employingthe photodegradation of 4-nitrophenol as probe reaction in a liquid–solid system. Loading with suitable amounts of W, Co and Smresulted in a significant improvement of the photoreactivity of TiO2. This beneficial effect was attributed to an increased separationof the photogenerated electron–hole pairs. Some samples were more photoactive than commercial powders employed in the same experimentalconditions.Films of TiO2 loaded with the metals that yielded the best photocatalytic responses were prepared by the dip-coating technique. Thephotoactivity of the films was tested by evaluating the rate of degradation of 2-propanol in a gas–solid system. An enhancement of thephotocatalytic efficiency was obtained in the presence of W and Sm.

AB - Titanium dioxide nanoparticles loaded with Ce, Co, Eu, Sm, W and Yb species were prepared by coprecipitation in mild conditionsusing TiCl4 as precursor with the aim to enhance the photocatalytic activity, especially under visible light irradiation. The photocatalystswere characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), specific surface area (SSA) determination and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the powders of pure and loaded TiO2 was investigated by employingthe photodegradation of 4-nitrophenol as probe reaction in a liquid–solid system. Loading with suitable amounts of W, Co and Smresulted in a significant improvement of the photoreactivity of TiO2. This beneficial effect was attributed to an increased separationof the photogenerated electron–hole pairs. Some samples were more photoactive than commercial powders employed in the same experimentalconditions.Films of TiO2 loaded with the metals that yielded the best photocatalytic responses were prepared by the dip-coating technique. Thephotoactivity of the films was tested by evaluating the rate of degradation of 2-propanol in a gas–solid system. An enhancement of thephotocatalytic efficiency was obtained in the presence of W and Sm.

UR - http://hdl.handle.net/10447/28521

M3 - Article

VL - 339

SP - 94

EP - 103

JO - Chemical Physics

JF - Chemical Physics

SN - 0301-0104

ER -