کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596297 879512 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bimetallic Cu–Ni nanoparticles of varying composition (CuNi3, CuNi, Cu3Ni)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Bimetallic Cu–Ni nanoparticles of varying composition (CuNi3, CuNi, Cu3Ni)
چکیده انگلیسی

Cu–Ni (1:3, 1:1, 3:1) bimetallic nanoparticles have been synthesized by a microemulsion route using CTAB (cetyltrimethyl ammoniumbromide) as the surfactant and hydrazine/NaOH as the precipitating agent followed by reduction in hydrogen atmosphere. This is the first report of the synthesis of CuNi3 and Cu3Ni nanoparticles. Transmission electron microscopy (TEM) studies show nearly monodisperse and uniform nanoparticles of average grain size of 7 nm for the 1:1 alloy nanoparticles while the 1:3 and 3:1 compositions show uniform nanoparticles with the grain size in the range of 20–30 nm. X-ray photoelectron spectroscopy (XPS) studies confirm the expected Cu/Ni ratios in these alloys. These bimetallic nanoparticles show ferromagnetic behavior and the magnetization decreases with increase in concentration of copper. The specific surface area of these alloy nanoparticles was found to be in the range of 6–9.42 m2/g.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 331, Issue 3, 31 December 2008, Pages 206–212
نویسندگان
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