کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1169220 | 960625 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical detection of celecoxib at a polyaniline grafted multiwall carbon nanotubes modified electrode Electrochemical detection of celecoxib at a polyaniline grafted multiwall carbon nanotubes modified electrode](/preview/png/1169220.png)
A modified electrode is fabricated by grafting polyaniline (PANI) chains onto multiwall carbon nanotubes (MWNTs) and utilized for the adsorptive reduction of celecoxib (CEL). PANI-g-MWNTs modified electrode appreciably enhances the sensitive detection of CEL in extremely lower concentrations (1 × 10−11 M). Square wave stripping voltammogram (SWSV) shows a reduction peak at −1.08 V with a high peak current for SW frequency of 100 Hz, amplitude of 25 mV and step height of 6 mV. The high surface area of PANI-g-MWNTs is effectively utilized for the adsorption of CEL to preconcentrate at the electrode. The PANI chains covalently linked to MWNTs mediate the electron transfer processes. The present finding open-up the scope for extending on the use of other conducting polymers grafted MWNTs modified electrodes for the detection of compounds that do not have surface-active properties at conventional electrodes.
Journal: Analytica Chimica Acta - Volume 626, Issue 1, 19 September 2008, Pages 1–9