| Effects of annealing on the microstructures and photoactivity of fluorinated N-doped TiO2. | |
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MedLine Citation:
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PMID: 20717595 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We investigated the effects of annealing in air on fluorinated N-doped TiO(2) (F/N-TiO(2)) photocatalysts prepared by hydrothermal process. The textural properties (specific surface areas) and surface properties (surface defect density, surface [triple bond]Ti-F density) were significantly modified upon annealing. In contrast, due to the shielding effect of surface fluorination, the phase transformation from anatase to rutile as well as removal of N-dopants during annealing was greatly inhibited. The evolution of the chemical nature of doped nitrogen species upon annealing in air was investigated and correlated with the generation and annihilation of oxygen deficiency. The defect density dominated the visible-light absorption and production of active ˙OH. The textural properties and the surface characteristics were crucial for UV-light photocatalytic performance, while the visible-light photocatalytic activity was mainly associated with the defect density. The 300 °C-annealed F/N-TiO(2) sample showed considerable photocatalytic activity under both UV and visible-light irradiation. |
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Authors:
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Shengwei Liu; Jiaguo Yu; Wenguang Wang |
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Publication Detail:
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Type: Journal Article Date: 2010-08-18 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: 12 ISSN: 1463-9084 ISO Abbreviation: Phys Chem Chem Phys Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-24 Completed Date: 2011-01-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: England |
Other Details:
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Languages: eng Pagination: 12308-15 Citation Subset: - |
Affiliation:
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State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122#, Wuhan 430070, PR China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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