Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO_2 photocatalyst.
In: Journal of Environmental Sciences (IOS Press), Jg. 17 (2005), Heft 1, S. 76-80
academicJournal
Zugriff:
The nitrogen and fluorine co-doped TiO_2 polycrystalline powder was synthesized by calcinations of the hydrolysis product of tetrabutyl titanate with ammonium fluoride. Nitrogen and fluorine co-doping causes the absorption edge of TiO_2 to shift to a lower energy region. The photocatalytic activity of co-doped TiO_2 with anatase phases was found to be 2.4 times higher than that of the commercial TiO_2 photocatalyst Degussa P25 for phenol decomposition under visible light irradiation. The co-doped TiO_2 powders only contain anatase phases even at 1000°C. Apparently, ammonium fluoride added retarded phase transformation of the TiO_2 powders from anatase to rutile. The substitutional fluorine and interstitial nitrogen atoms in co-doped TiO_2 polycrystalline powder were responsible for the vis light response and caused the absorption edge of TiO_2 to shift to a lower energy region. [ABSTRACT FROM AUTHOR]
Titel: |
Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO_2 photocatalyst.
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Autor/in / Beteiligte Person: | Zheng-peng, Wang ; Jun, Xu ; Wei-min, Cai ; Bao-xue, Zhou ; Zheng-guang, He ; Chun-guang, Cai ; Xiao-ting, Hong |
Zeitschrift: | Journal of Environmental Sciences (IOS Press), Jg. 17 (2005), Heft 1, S. 76-80 |
Veröffentlichung: | 2005 |
Medientyp: | academicJournal |
ISSN: | 1001-0742 (print) |
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