کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
594513 1453981 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Colorimetric detection of Cu2+ using 4-mercaptobenzoic acid modified silver nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Colorimetric detection of Cu2+ using 4-mercaptobenzoic acid modified silver nanoparticles
چکیده انگلیسی

A highly sensitive and selective method is proposed for colorimetric detection of copper ions using 4-mercaptobenzoic acid (4-MBA) modified silver nanoparticles (AgNPs). The presence of Cu2+ induces the aggregation of 4-MBA modified AgNPs, this resulting in a color change from bright yellow to purple. The concentration of Cu2+ could be quantified by naked eyes or a UV–vis spectrometer. The absorbance ratio (A560 nm/A393 nm) is linear with the concentration of Cu2+ ranging from 1 × 10−7 M to 1 × 10−4 M with a coefficient of 0.998. The detection limit is as low as 2.5 × 10−8 M. The proposed method could be successfully applied to determine Cu2+ in drinking water.

The presence of Cu2+ induces the aggregation of 4-MBA modified AgNPs, this resulting in a color change from bright yellow to purple. The concentration of Cu2+ could be quantified by naked eyes or a UV–vis spectrometer.Figure optionsDownload as PowerPoint slideHighlights
► A sensitive method for Cu2+ detection has been developed.
► A detection limit of 2.5 × 10−8 M was obtained.
► The proposed method could be used to determine Cu2+ in drinking water.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 391, Issues 1–3, 5 November 2011, Pages 179–183
نویسندگان
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