کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1167601 | 1491134 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel biosensing mechanism based on a poly(N-butyl benzimidazole)-modified gold electrode for the detection of hydrogen peroxide
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel mechanism to detect hydrogen peroxide (H2O2) using a poly(N-butyl benzimidazole) (PBBI)-modified gold (PBBI/Au) electrode is proposed. Synthetic PBBI was oxidized using a mixture of acetic acid (AcOH) and H2O2 to form PBBI N-oxide (PBBINO). The structure of PBBINO was verified by Fourier transform infrared spectroscopy (FT-IR) and the degree of oxidation was measured by X-ray photoelectron spectroscopy (XPS). Moreover, the oxide could be reduced electrochemically back to PBBI. Based on this reaction, a novel enzyme-free PBBI/Au electrode was developed to detect H2O2 in the presence of AcOH electrochemically. The biosensor detected H2O2 linearly over concentrations ranging from 25 μM to 10 mM with a detection limit of 6.25 μM in phosphate buffer solution (PBS) mixed with AcOH at pH 6.4. In addition, at an applied potential of â0.5 V, the sensor characteristics could be tuned using AcOH over a pH range of 3.7-6.4. The sensitivity of the probe could be enhanced from 35.1 to 419.4 μA mMâ1 cmâ2 by modifying the surface morphology of the PBBI/Au electrode from a smooth plane to a granular, three-dimensional configuration. Furthermore, it was not influenced by interfering compounds and showed high thermal stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 693, Issues 1â2, 5 May 2011, Pages 114-120
Journal: Analytica Chimica Acta - Volume 693, Issues 1â2, 5 May 2011, Pages 114-120
نویسندگان
Mu-Yi Hua, Hsiao-Chien Chen, Rung-Ywan Tsai, Yu-Chen Lin, Leeyih Wang,