Stripping chronopotentiometric analysis of cysteine on nano-silver coat polyquercetin¨CMWCNT modified platinum electrode
详细信息 查看全文
- 作者：Guan-Ping Jin ; Li-Li Chen ; Guo-Pei Hang ; Shan-Zhong Yang and Xiao-Jing Wu
- 关键词：Stripping chronopotentiometric analysis ; CysHteine ; Silver nanoparticles ; Multi ; walled carbon nanotube
- 刊名：Journal of Solid State Electrochemistry
- 出版年：2010
- 出版时间：July, 2010
- 年：2010
- 卷：14
- 期：7
- 页码：1163-1169
- 全文大小：396.0 KB
文摘
Silver nanoparticles coat polyquercetin (Qu) and multi-walled carbon nanotube (MWCNT) complex films were prepared using an electrochemical coupling strategy on platinum electrode (Ag/Qu/MWCNT/Ch/Pt). The new composite material was characterized by means of field emission scanning electron microscopy, X-ray photoelectron spectroscopy spectra, X-ray diffraction, and electrochemical techniques, which confirmed that polyquercetin plays an important role to obtain a great deal of uniformly dispersed silver nanoparticles and MWCNT complex film with a diameter of 10 ¡À 6 nm. The resulting Ag/Qu/MWCNT/Ch/Pt electrode shows a significant electrocatalysis for the redox of cysteine (CysH). The stripping chronopotentiometric analysis of CysH has been successfully used with a satisfying effect. A linear range of 1 ¡Á 10−10 to 9 ¡Á 10−8 M was obtained with a detection limit of 3 ¡Á 10−11 M (3σ) and sensitivity of 35 ¦ÌA/nM. The films were also robust, surviving up to 100 consecutive cyclic voltammograms and sonication.