کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1278469 1497646 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Iron doped nanostructured TiO2 for photoelectrochemical generation of hydrogen
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Iron doped nanostructured TiO2 for photoelectrochemical generation of hydrogen
چکیده انگلیسی

This paper describes the photoelectrochemical studies on nanostructured iron doped titanium dioxide (TiO2) thin films prepared by sol-gel spin coating method. Thin films were characterized by X-ray diffraction, Raman spectroscopy, spectral absorbance, atomic force microscopy and photoelectrochemical (PEC) measurements. XRD study shows that the films were polycrystalline with the photoactive anatase phase of TiO2. Doping of Fe in TiO2 resulted in a shift of absorption edge towards the visible region of solar spectrum. The observed bandgap energy decreased from 3.3 to 2.89 eV on increasing the doping concentration upto 0.2 at.% Fe. 0.2 at.% Fe doped TiO2 exhibited the highest photocurrent density, ∼0.92 mA/cm2 at zero external bias. Flatband potential and donor density determined from the Mott–Schottky plots were found to vary with doping concentration from −0.54 to −0.92 V/SCE and 1.7 × 1019 to 4.3 × 1019 cm−3, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 33, Issue 20, October 2008, Pages 5363–5368
نویسندگان
, , , , ,