Huijie Shi, Guohua Zhao, Meichuan Liu
Dec 1, 2011
Citations
1
Influential Citations
89
Citations
Quality indicators
Journal
Electrochemistry Communications
Abstract
Abstract As a putative endocrine disruptor that lacks electrochemical activity, 2,4-dichlorophenoxyacetic acid (2,4-D) was hard to be detected by direct electrochemistry technique. This study described a highly selective and sensitive 2,4-D photoelectrochemical sensor based on modified TiO 2 nanotubes (TiO 2 NTs) with a low detection limit of 10 nM (S/N = 3). For the first time, a polypyrrole-based molecularly imprinted polymer was used as recognition element in a photoelectrochemical sensor, which gave it the capability of high selectivity for 2,4-D determination in multicomponent water samples. Results indicated that 20-fold excess of other coexistent pesticides hardly caused any interference on the photocurrent of 2,4-D. The practical application of the sensor was also realized for the selective determination of 2,4-D in spiked samples. The study made a successful attempt in the development of highly selective and sensitive photoelectrochemical sensor for endocrine disruptors monitoring.