کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1690851 1011279 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization and photocatalytic activity of TiO2 thin films prepared by RF magnetron sputtering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Characterization and photocatalytic activity of TiO2 thin films prepared by RF magnetron sputtering
چکیده انگلیسی

TiO2 nano-structured thin films were prepared by RF magnetron sputtering and annealed in ambient air for 1 h at 400, 600, 800, 1000, and 1200 °C, respectively. Their phase structure, surface topography, and energy gap were characterized by X-ray diffractometer, atomic force microscope, and fluorescence spectrometer. Photocatalytic activity of the films was evaluated by light induced degradation of methyl orange (C14H14N3NaO3S) solution using a high pressure mercury lamp as lamp-house. The relation of photocatalytic activity and annealed temperature was studied in detail. It is found that the crystal phase transforms from amorphous to anatase, and rutile structure with annealing temperature increasing from room temperature to 1200 °C. Energy gap varies with annealing temperature. Photocatalytic activity is dependent on energy gap and grain size. Suitable energy gap from 2.97 to 3.07 eV is favorable for creation of electronic-hole pairs that make the films show excellent photocatalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 85, Issue 1, 23 July 2010, Pages 84–88
نویسندگان
, ,