کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
728673 1461420 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Room-temperature synthesis of nanocrystalline titanium dioxide via electrochemical anodization
ترجمه فارسی عنوان
سنتز دمای اتاق از دی اکسید تیتانیوم نانوکریستال از طریق آنودایزر الکتروشیمیایی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی

This paper presents a study of the growth of nanoporous anatase and rutile phases of titanium dioxide (TiO2) subjected to electrochemical anodization at room temperature without post-thermal treatment, using sulfuric acid as the electrolyte. Effects of the applied voltage on the morphological, structural, and photoelectrochemical (PEC) properties were examined. Images from field emission scanning electron microscopy reveal that pore size could be manipulated by changing the anodization voltage. In addition, X-ray diffraction (XRD) results indicate that anatase and rutile phases of TiO2 appeared in samples subjected to minimum anodization voltages of 100 V and 150 V. The Scherrer method was used to calculate the mean crystallite size, and the interplanar d-spacing formula was used to obtain the in-plane and out-of-plane strains. XRD measurements reveal that the amount of anatase and rutile crystallinity and their mean crystallite sizes were affected significantly by the anodization voltage. Results of the PEC studies reveal that the photocurrent density and photoconversion efficiency increased with increasing anodization voltage. In addition, the synthesized nanoporous TiO2 showed stable photoresponse where only a small decay of photocurrent density is observed in numerous on-to-off illumination cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science in Semiconductor Processing - Volume 26, October 2014, Pages 130–136
نویسندگان
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