کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1241873 1495792 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A carbon needle microelectrode decorated with TiO2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A carbon needle microelectrode decorated with TiO2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element
چکیده انگلیسی


• A carbon needle microelectrode decorated with TiO2 nanosheets is proposed.
• TiO2 nanosheets with reactive (001) facets has enhanced the catalytic activity for acetaminophen detection.
• High sensitivity, selectivity, stability, reproducibility and easy fabrication.

We demonstrate a highly efficient electrocatalytic activity of TiO2 nanosheets with reactive (001) facets grown on a carbon needle microelectrode (TiO2-CNE). This microelectrode is prepared by a simple hydrothermal process. Scanning electron microscopy, high-resolution transmission electron microscopy, and electrochemical impedance spectroscopy were used to characterize as-prepared TiO2-CNE. These methods confirm that the surface area-to-volume ratio and electron transfer rate of TiO2-CNE are considerably greater than those of the bare electrode. In addition, the amperometric response for acetaminophen (AP) oxidation is remarkably facilitated by 13.9 times at the TiO2-CNE by the enlarged surface area-to-volume ratio, as well as the exposure of high-energy (001) facets. Furthermore, the constructed electrochemical sensor displays excellent analytical performance for AP detection over a range of 0.002–100.0 μM, with a detection limit of 0.83 nM (S/N=3). The electrode was applied for the in vitro determination of AP in fish blood 30 min after injection in the abdominal cavity. Consequently, the present approach shows feasibility and great potential in constructing highly sensitive and low-consumption miniaturized electrochemical sensors in the field of biological applications.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 143, 1 October 2015, Pages 184–190
نویسندگان
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