کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1625392 1516428 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bi2O3/CuCr2O4–CuO core/shell structured nanocomposites: Facile synthesis and catalysis characterization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Bi2O3/CuCr2O4–CuO core/shell structured nanocomposites: Facile synthesis and catalysis characterization
چکیده انگلیسی

In this paper, spherical monodisperse Bi2O3 nanoparticles were first prepared. Then, Bi2O3/CuCr2O4–CuO nanocomposites with a homogeneous core/shell nanostructure have been further synthesized by encapsulating CuCr2O4–CuO on the surfaces of the as-prepared Bi2O3 nanoparticles via an in situ precipitation method. Techniques of XRD, TEM, EDS, and FTIR have been employed to characterize the as-synthesized materials. The formation mechanism of the core/shell structured Bi2O3/CuCr2O4–CuO nanoparticles was also briefly discussed. The results indicate that the pre-coating of NH4+ on the surfaces of Bi2O3 nanoparticles plays an essential role in the formation of homogeneous Bi2O3/CuCr2O4–CuO core/shell nanoparticles. Meantime, the catalytic properties of the as-synthesized Bi2O3/CuCr2O4–CuO core/shell nanoparticles have been readily evaluated. The results show that the resultant Bi2O3/CuCr2O4 core/shell nanomaterials demonstrate high catalytic activities towards the oxidation of CO.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 448, Issues 1–2, 10 January 2008, Pages 287–292
نویسندگان
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