کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
49251 46730 2016 5 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Spectrophotometric analysis of nickel colloid performances as catalysts for hydrogenation of nitro-phenol: Influence of the stabilizing agents
ترجمه فارسی عنوان
تجزیه و تحلیل اسپکتروفتومتری از عملکرد کلوئید نیکل به عنوان کاتالیزور برای هیدروژنه شدن نیترو فنل: تأثیر عوامل ثبات دهنده
کلمات کلیدی
کلوئید نیکل؛ عامل تثبیت کننده هیدروژناسیون کاتالیزوری؛ 4-نیتروفنول؛ طیف سنج UV-Vis؛ تجزیه و تحلیل سینتیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Ni nanoparticles are prepared through thermolysis and polyol procedures.
• Ni colloids have similar dimensions and structure but different capping agents.
• The reduction of 4-NPh catalysed by Ni NPs is spectrophotometrically monitored.
• Alkyl amine-stabilized NPs show the higher reaction rate and TON value.
• Azocompounds are also formed when the catalyst is stabilized by alkyl amines.

Nickel nanoparticles are prepared through thermolysis or polyol procedures and they are fully characterized through TEM and XRD. The catalytic efficiencies are tested toward the hydrogenation reaction of 4-nitrophenol, which was spectrophotometrically detected. A significant improvement of the reaction rate and turnover number (TON) and frequency (TOF) is observed using alkyl amine-stabilized nanoparticles, likely due to their reduced surface steric hindrance. However, the polymer stabilized-nanocatalysts show a better selectivity for product formation, since only hydrogenation products are observed, while azo-benzene derivatives are detected when alkyl amine-stabilized nanoparticles are used. The findings indicate an important impact of surface properties of colloids on the catalysed reaction.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 74, 10 January 2016, Pages 28–32
نویسندگان
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