Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides

Ryoji Asahi; Takeshi Morikawa; Takeshi Ohwaki; Koichi Aoki; Yasunori Taga

doi:10.1126/science.1061051

Abstract

To use solar irradiation or interior lighting efficiently, we sought a photocatalyst with high reactivity under visible light. Films and powders of TiO 2- x N x have revealed an improvement over titanium dioxide (TiO 2 ) under visible light (wavelength < 500 nanometers) in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface. Nitrogen doped into substitutional sites of TiO 2 has proven to be indispensable for band-gap narrowing and photocatalytic activity, as assessed by first-principles calculations and x-ray photoemission spectroscopy.

Keywords

PhotocatalysisVisible spectrumTitanium dioxideMaterials scienceMethylene bluePhotochemistryDopingIrradiationAcetaldehydeAbsorption (acoustics)X-ray photoelectron spectroscopyNitrogenTitaniumBand gapTitanium oxideNanometreOptoelectronicsChemical engineeringChemistryCatalysisOrganic chemistry

Affiliated Institutions

Toyota Central Research and Development Laboratories (Japan) JP

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Publication Info

Year: 2001
Type: article
Volume: 293
Issue: 5528
Pages: 269-271
Citations: 12051
Access: Closed

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APA Style

                            
                                
                                    Ryoji Asahi, 
                                
                                    Takeshi Morikawa, 
                                
                                    Takeshi Ohwaki
                                
                                et al.
                            
                            (2001). 
                            Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides. 
                            Science
                            , 293
                            (5528)
                            , 269-271.
                            https://doi.org/10.1126/science.1061051
                        

Identifiers

DOI: 10.1126/science.1061051