کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7141071 1462032 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nickel oxyhydroxide-functionalized n-silicon photoelectrode for the photocurrent determination of Hg(II) ions at zero working voltage
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Nickel oxyhydroxide-functionalized n-silicon photoelectrode for the photocurrent determination of Hg(II) ions at zero working voltage
چکیده انگلیسی
Fast and accurate detection of aqueous mercury(II) ions is of significant importance as it raises serious risks for human health and the environment. Here, we report a photoelectrochemical determination of mercury(II) ions with nickel oxyhydroxide-functionalized n-silicon photoanodes at zero working voltage. Based on the catalysis effect of Hg(II) ions on the photocurrent of the catechol probe, a simple and sensitive photoelectrochemical sensor was constructed for Hg(II) ions detection in purified drinking waters (PW1, PW2 and PW3). The photocurrents show good response after the solution containing Hg(II) ions was added to the photoelectrochemically active catechol solution. Under the optimized conditions, the increase of photocurrent is proportional to the Hg(II) ions concentration, the linear dynamic range is observed from 10 nM to 450 nM with the detection limits of 5.4, 7.2 and 5.2 nM in PW1, PW2 and PW3, respectively. Our work suggests that the two electrodes structures are promising for low-cost, portable, real-time, heavy metal ion detectors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 257, March 2018, Pages 9-15
نویسندگان
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