کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
48443 46507 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanocolumnar titania thin films uniquely incorporated with carbon for visible light photocatalysis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Nanocolumnar titania thin films uniquely incorporated with carbon for visible light photocatalysis
چکیده انگلیسی

Carbon-doped or carbon-covered titania can enhance photocatalytic performance under visible light. Here we report the first instance of synergistic effect of the carbon incorporation in anatase titania (TiO2−xCx:C) films with both substitutional doping and surface covered characteristics, by reactively co-sputtering Ti metal and graphite targets. The nature of incorporated carbon is characterized by Raman spectroscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. The absorption edge of the carbon incorporated titania thin films shifted from ultraviolet to visible region and directly depended on the carbon content. The photocatalytic performance, e.g., photodegradation of methylene blue (MB), photo-reduction of silver-ions and super hydrophilicity, was greatly enhanced with increasing carbon content. The best photocatalytic activity is obtained in the TiO2−xCx:C film of the most carbon concentration about 9.3 at.% with a degradation rate-constant of 0.108 h−1 for MB under visible-light illumination.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 76, Issues 3–4, 15 November 2007, Pages 328–334
نویسندگان
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