کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1331698 979012 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visible-light photocatalytic activity of the metastable Bi20TiO32 synthesized by a high-temperature quenching method
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Visible-light photocatalytic activity of the metastable Bi20TiO32 synthesized by a high-temperature quenching method
چکیده انگلیسی

Metastable Bi20TiO32 samples were synthesized by a high-temperature quenching method using α-Bi2O3 and anatase TiO2 as raw materials. The photocatalytic activity of the as-prepared samples was measured with the photodegradation of methyl orange at room temperature under visible light irradiation. The Bi20TiO32 samples exhibited good absorption in the visible light region with a band gap of about 2.38 eV and the band structure of Bi20TiO32 was studied. Photodegradation against methyl orange was much better than α-Bi2O3 prepared by the same way. The photocatalytic activity of Bi20TiO32 samples is supposed to be associated with the hybridized Bi 6s and O 2p orbitals. In addition, the dispersive characteristic of Bi 6s orbital in the hybridized valence band facilitates the mobility of the photogenerated carriers and hampers their recombination.

Metastable Bi20TiO32 samples were successfully synthesized by a quenching process. Photodegradation against methyl orange showed high visible-light activity and it was supposed to be associated with its corresponding band structure.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 182, Issue 8, August 2009, Pages 2274–2278
نویسندگان
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