کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1333903 979117 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visible light-sensitive yellow TiO2−xNx and Fe–N co-doped Ti1−yFeyO2−xNx anatase photocatalysts
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Visible light-sensitive yellow TiO2−xNx and Fe–N co-doped Ti1−yFeyO2−xNx anatase photocatalysts
چکیده انگلیسی

Nitrogen substituted yellow colored anatase TiO2−xNx and Fe–N co-doped Ti1−yFeyO2−xNx have been easily synthesized by novel hydrazine method. White anatase TiO2−δ and N/Fe–N-doped samples are semiconducting and the presence of ESR signals at g ∼1.994–2.0025 supports the oxygen vacancy and g∼4.3 indicates Fe3+ in the lattice. TiO2−xNx has higher conductivity than TiO2−x and Fe/Fe–N-doped anatase and the UV absorption edge of white TiO2−x extends in the visible region in N, Fe and Fe–N co-doped TiO2, which show, respectively, two band gaps at ∼3.25/2.63, ∼3.31/2.44 and 2.8/2.44 eV. An activation energy of ∼1.8 eV is observed in Arrhenius log resistivity vs. 1/T plots for all samples. All TiO2 and Fe-doped TiO2 show low 2-propanol photodegradation activity but have significant NO photodestruction capability, both in UV and visible regions, while standard Degussa P-25 is incapable in destroying NO in the visible region The mid-gap levels that these N and Fe–N-doped TiO2 consist may cause this discrepancy in their photocatalytic activities.

DRS of TiO2, N/Fe–N doped TiO2.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 10, October 2006, Pages 3033–3044
نویسندگان
, , , , , , ,