کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10559451 | 969627 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis of N-acetyl-l-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg2+
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Facile synthesis of N-acetyl-l-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg2+ Facile synthesis of N-acetyl-l-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg2+](/preview/png/10559451.png)
چکیده انگلیسی
This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg2+ ions based on N-acetyl-l-cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg2+ ions was developed based on fluorescence quenching of ZnS QDs with high sensitivity and selectivity. Under optimal conditions, its response was linearly proportional to the concentration of Hg2+ ions in a range from 0 to 2.4 Ã 10â6 mol Lâ1 with a detection limit of 5.0 Ã 10â9 mol Lâ1. Most of common physiologically relevant cations and anions did not interfere with the detection of Hg2+. The proposed method was applied to the trace determination of Hg2+ ions in water samples. The possible quenching mechanism was also examined by fluorescence and UV-vis absorption spectra.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 85, Issue 4, 30 September 2011, Pages 1738-1743
Journal: Talanta - Volume 85, Issue 4, 30 September 2011, Pages 1738-1743
نویسندگان
Junling Duan, Xiaochen Jiang, Shouqing Ni, Min Yang, Jinhua Zhan,