| A two-dimensional phase of TiO(2) with a reduced bandgap. | |
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MedLine Citation:
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PMID: 21430688 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Titanium dioxide is the prototypical transition metal oxide photocatalyst. However, the larger than 3 eV bandgap of common bulk phases of TiO(2) limits its light absorption to UV light, making it inefficient for solar energy conversion. Attempts at increasing visible light activity by narrowing the bandgap of TiO(2) through doping have proven difficult, because of defect-induced charge trapping and recombination sites of photo-excited charge carriers. Here, we report the existence of a dopant-free, pure TiO(2) phase with a narrow bandgap. This new pure TiO(2) phase forms on the surface of rutile TiO(2)(011) by oxidation of bulk titanium interstitials. We measure a bandgap of only ~2.1 eV for this new phase, matching it closely with the energy of visible light. |
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Authors:
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Junguang Tao; Tim Luttrell; Matthias Batzill |
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Publication Detail:
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Type: Journal Article Date: 2011-03-13 |
Journal Detail:
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Title: Nature chemistry Volume: 3 ISSN: 1755-4349 ISO Abbreviation: Nat Chem Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101499734 Medline TA: Nat Chem Country: England |
Other Details:
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Languages: eng Pagination: 296-300 Citation Subset: IM |
Affiliation:
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Department of Physics, University of South Florida, Tampa, Florida 33620, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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