کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9676038 | 1454112 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of catalytically efficient precious metallic colloids by γ-irradiation and characterization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
Polymer (polyvinylpyrrodione, PVP)-protected Ag, Au, Pd, and Pt colloids were prepared in water and organic solvents (acetone/2-propanol = 1/1, vol.%) by γ-irradiation. UV-visible spectrum of the colloidal solution shows the characteristic bands of surface resonance and gives evidence for the formation of nanoparticles. Nanopowders of precious metals (Ag, Au, Pd, and Pt) were obtained by self-assembling the thiol group of mercaptosuccinic acid (MSA) with the surface of the metal particles. Transmission electron microscopy and X-ray diffraction were used for characterizing the nanopowders. Results from high-performance liquid chromatography (HPLC) give evidence that Pd and Ag colloids in aqueous solution and organic solvents can be effectively used for the hydrogenation of cis,cis-1,3-cyclooctadiene (COD).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 256, Issues 2â3, 22 April 2005, Pages 165-170
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 256, Issues 2â3, 22 April 2005, Pages 165-170
نویسندگان
Seong-Ho Choi, Yu-Ping Zhang, A. Gopalan, Kwang-Pill Lee, Hee-Dong Kang,