کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
28733 44089 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photodeposition of CdSe using Se-TiO2 suspensions as photocatalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Photodeposition of CdSe using Se-TiO2 suspensions as photocatalysts
چکیده انگلیسی

The photodeposition of cadmium selenide (CdSe) using Se-TiO2 photocatalysts was studied at pH 3.5 and 7 in the presence of formic acid. The Se-TiO2 photocatalysts were obtained by Se ion photoreduction using selenite (Se(IV)) and selenate (Se(VI)) as precursors. The formation of cadmium selenide was attributed to the reaction between cadmium ions and selenide ions (Se2−) released from the Se deposited on TiO2 particles under illumination. The release of the Se2− ions from the Se–TiO2 is believed to be the determining step for the formation of the CdSe particles, hence controlling their morphology as either rod-shaped or spherical. Metallic cadmium was also detected on the surface of TiO2 particles as a product of the photocatalytic reduction at pH 7. Its formation was attributed to the photoreduction of cadmium by the photogenerated electrons in the TiO2 and/or the Se semiconductors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 179, Issues 1–2, 1 April 2006, Pages 57–65
نویسندگان
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