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Recent Patents on Engineering
ISSN (Print): 1872-2121
ISSN (Online): 2212-4047
VOLUME: 2
ISSUE: 3
DOI: 10.2174/187221208786306289      Price:  $100









Doped-TiO2: A Review

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Author(s): Adriana Zaleska
Pages 157-164 (8)
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
Affiliation:
Department of Chemical Technology, Gdansk University of Technology, 80-952-Gdansk, Poland.