Abstract
Titanium dioxide represents an effective photocatalyst for water and air purification and for self-cleaning surfaces. Additionally, it can be used as antibacterial agent because of strong oxidation activity and superhydrophilicity. TiO2 shows relatively high reactivity and chemical stability under ultraviolet light (λ < 387nm), whose energy exceeds the band gap of 3.3 eV in the anatase crystalline phase. The development of photocatalysts exhibiting high reactivity under visible light (λ > 400 nm) should allow the main part of the solar spectrum, even under poor illumination of interior lighting, to be used. Visible light-activated TiO2 could be prepared by metal-ion implantation, reducing of TiO2, nonmetal doping or sensitizing of TiO2 with dyes. This paper reviews preparation methods of doped-TiO2 with metallic and nonmetallic species, including various types of dopants and doping methods currently available. The mechanism of heterogeneous photocatalysis in the presence of TiO2 is also discussed.
Keywords: Doped-TiO2, metal-doping, monmetal-doping, TiO2 preparation methods, heterogeneous photocatalysis
Recent Patents on Engineering
Title: Doped-TiO2: A Review
Volume: 2 Issue: 3
Author(s): Adriana Zaleska
Affiliation:
Keywords: Doped-TiO2, metal-doping, monmetal-doping, TiO2 preparation methods, heterogeneous photocatalysis
Abstract: Titanium dioxide represents an effective photocatalyst for water and air purification and for self-cleaning surfaces. Additionally, it can be used as antibacterial agent because of strong oxidation activity and superhydrophilicity. TiO2 shows relatively high reactivity and chemical stability under ultraviolet light (λ < 387nm), whose energy exceeds the band gap of 3.3 eV in the anatase crystalline phase. The development of photocatalysts exhibiting high reactivity under visible light (λ > 400 nm) should allow the main part of the solar spectrum, even under poor illumination of interior lighting, to be used. Visible light-activated TiO2 could be prepared by metal-ion implantation, reducing of TiO2, nonmetal doping or sensitizing of TiO2 with dyes. This paper reviews preparation methods of doped-TiO2 with metallic and nonmetallic species, including various types of dopants and doping methods currently available. The mechanism of heterogeneous photocatalysis in the presence of TiO2 is also discussed.
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Cite this article as:
Zaleska Adriana, Doped-TiO2: A Review, Recent Patents on Engineering 2008; 2 (3) . https://dx.doi.org/10.2174/187221208786306289
DOI https://dx.doi.org/10.2174/187221208786306289 |
Print ISSN 1872-2121 |
Publisher Name Bentham Science Publisher |
Online ISSN 2212-4047 |
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