کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5031704 1369954 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly selective colorimetric and electrochemical sensing of iron (III) using Nile red functionalized graphene film
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Highly selective colorimetric and electrochemical sensing of iron (III) using Nile red functionalized graphene film
چکیده انگلیسی
We report a highly selective method for identification and detection of iron (III) (ferric iron, Fe3+) using Nile red (NR) as a complexing agent. Fe3+ preferentially binds with NR in dimethylformamide (DMF)/water (1:1) solution over other cations such as Fe2+, Cu2+, Pb2+, Hg2+, Mn2+, Ni2+, Zn2+, Co2+ and Cd2+ at room temperature. In the presence of Fe3+, the color of NR solution changes from purple to dark brown, which is detectable with bare eyes. Using UV-vis spectroscopy, we could measure the amount of Fe3+ in the sample solution by monitoring changes in absorption from 540 to 580 nm; the linear range and the limit of detection are 30-1000 µM and 24.9 µM, respectively. Taking advantage of the NR selectivity, we treated partially oxidized graphene sheets (po-Gr) with NR to obtain po-Gr-NR dispersion by ultrasonication. The NR-treated po-Gr flakes (po-Gr-NR) were characterized by UV-vis, FT-IR, and Raman spectroscopies and FE-SEM, which indicated attachment of NR on po-Gr sheets. The po-Gr-NR hybrid film deposited glassy carbon electrode (po-Gr-NR/GCE) served as the Fe3+ sensor. Differential pulse voltammetry was used to investigate the detection of Fe3+ in 0.05 M HCl+0.05 M KCl solution. The linear range and the limit of detection of Fe3+ were from 37.5 nM to 21.53 µM and 18.7 nM, respectively. Furthermore, this sensor was successfully used to measure Fe3+ content in red wine samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 89, Part 1, 15 March 2017, Pages 430-436
نویسندگان
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