What question did this study set out to answer?

To develop a titanium dioxide photocatalyst capable of operating efficiently under visible light from solar irradiation or interior lighting.

July 13, 2001Science

Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides

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Authors

RARyoji AsahiNagoya University TMTakeshi MorikawaToyota Central Research and Development Laboratories (Japan)TOTakeshi OhwakiToyota Central Research and Development Laboratories (Japan)

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Implication

Experimental study reveals enhanced visible-light photocatalysis in nitrogen-doped titanium dioxide, indicating substitutional nitrogen narrows band gaps for improved solar harvesting.

Key Points

To develop a titanium dioxide photocatalyst capable of operating efficiently under visible light from solar irradiation or interior lighting.
Synthesized nitrogen-doped titanium dioxide (TiO2-xNx) in both film and powder forms.
Tested optical absorption, surface hydrophilicity, and photodegradation of methylene blue and gaseous acetaldehyde under visible light (< 500 nm).
Characterized atomic doping sites and electronic band structure using first-principles calculations and X-ray photoemission spectroscopy.
Nitrogen-doped titanium dioxide exhibited higher optical absorption and superior photocatalytic degradation of organic compounds under visible light compared to pristine TiO2.
Substitutional doping of nitrogen into titanium dioxide crystal sites narrowed the band gap, providing the electronic state necessary for visible-light activation.

Cite This Study

Asahi et al. (2001) studied this question.

synapsesocial.com/papers/6994e7220c7aefadfa536d01 https://doi.org/10.1126/science.1061051

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July 13, 2001Science

Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides

View Full Paper

Ask AI

Bookmark

Authors

RARyoji AsahiNagoya University TMTakeshi MorikawaToyota Central Research and Development Laboratories (Japan)TOTakeshi OhwakiToyota Central Research and Development Laboratories (Japan)

Discussion

Member takes

Implication

Experimental study reveals enhanced visible-light photocatalysis in nitrogen-doped titanium dioxide, indicating substitutional nitrogen narrows band gaps for improved solar harvesting.

Key Points

To develop a titanium dioxide photocatalyst capable of operating efficiently under visible light from solar irradiation or interior lighting.
Synthesized nitrogen-doped titanium dioxide (TiO2-xNx) in both film and powder forms.
Tested optical absorption, surface hydrophilicity, and photodegradation of methylene blue and gaseous acetaldehyde under visible light (< 500 nm).
Characterized atomic doping sites and electronic band structure using first-principles calculations and X-ray photoemission spectroscopy.
Nitrogen-doped titanium dioxide exhibited higher optical absorption and superior photocatalytic degradation of organic compounds under visible light compared to pristine TiO2.
Substitutional doping of nitrogen into titanium dioxide crystal sites narrowed the band gap, providing the electronic state necessary for visible-light activation.

Cite This Study

Asahi et al. (2001) studied this question.

synapsesocial.com/papers/6994e7220c7aefadfa536d01 https://doi.org/10.1126/science.1061051

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