کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1526168 995367 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of Co-doped ZnO nanomaterials
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Preparation and characterization of Co-doped ZnO nanomaterials
چکیده انگلیسی

Freeze-drying is a convenient cryochemical powder processing method. In this paper, Co-doped ZnO nanomaterials (CZN) with Co content from 2 mol% to 10 mol% have been successfully synthesized via a novel freeze-drying route. X-ray diffraction (XRD), transmission electronic microscopy (TEM) and high-resolution TEM (HRTEM) were used to characterize the structure and morphology of the as-synthesized samples. All samples have a similar hexagonal wurtzite phase without metal cobalt, cobalt oxides or composites in the samples with Co concentration below 6 mol%. TEM image shows that CZN (4 mol% Co) is nanometer scale with average crystal size of 40 nm. Samples have a spherical morphology with moderate aggregation. The band gap energy of CZN from ultraviolet–visible (UV–vis) spectroscopy decreases with increasing the Co doping concentration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 114, Issue 1, 15 March 2009, Pages 279–282
نویسندگان
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