کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1428921 | 987161 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A new silver(I)-selective electrode based on derivatized MWCNTs@SiO2 nanocomposites as a neutral carrier A new silver(I)-selective electrode based on derivatized MWCNTs@SiO2 nanocomposites as a neutral carrier](/preview/png/1428921.png)
For the first time a novel carbon paste electrode (CPE) for the detection of trace silver(I) was designed by using derivatized silica-coated multi-walled carbon nanotubes (MWCNTs@SiO2) nanocomposites as a neutral carrier. This proposed electrode, with optimum composition, exhibits a wide dynamic range of 8.6 × 10− 8 to 1.0 × 10− 1 M toward silver(I) with a detection limit of 8.0 × 10− 8 M and a Nernstian slope of 60.8 ± 0.2 mV dec− 1. Meanwhile, it also shows a good selectivity and a relatively fast response time (~ 20 s), a long lifetime (1 month) and a wide pH range (4.0–9.0). Finally, the developed CPEs were successfully applied in the potentiometric titration of potassium bromide and determination of Cl− ions in different water samples.
► Derivatized MWCNTs@SiO2 nanocomposites were applied in ion-selective electrode.
► The nanocomposites exhibited a good Nernstian response to silver(I) ion.
► We studied the possible mechanism of this sensor.
► The developed CPEs were successfully applied in the determination of Cl− ions.
Journal: Materials Science and Engineering: C - Volume 32, Issue 6, 1 August 2012, Pages 1352–1357