Rosolina Samuel M, Bragg Stefanie A, Ouyang Ruizhuo, Chambers James Q, Xue Zi-Ling
Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA.
J Electroanal Chem (Lausanne). 2016 Nov 15;781:120-125. doi: 10.1016/j.jelechem.2016.08.001. Epub 2016 Aug 4.
A pyridine-functionalized thin film has been fabricated to selectively preconcentrate Cr(VI) anions for electrochemical detection in the 5-300 μg L range. Glassy carbon electrodes were modified through physical deposition of single-walled carbon nanotubes (SWNTs) on the electrode surface, followed by electrochemical deposition of a sol-gel containing a 2-pyridine functional group. The use of SWNTs has increased sensitivity for Cr(VI) detection in aqueous solutions, providing a detection limit of 0.8 μg L.
已制备出一种吡啶功能化薄膜,用于在5 - 300 μg/L范围内选择性预富集Cr(VI)阴离子以进行电化学检测。通过在电极表面物理沉积单壁碳纳米管(SWNTs),然后电化学沉积含有2 - 吡啶官能团的溶胶 - 凝胶,对玻碳电极进行了修饰。SWNTs的使用提高了水溶液中Cr(VI)检测的灵敏度,检测限为0.8 μg/L。