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Reference type: Journal
Authors: Shi HJ, Zhao GH, Liu MC, Zhu ZL
Article Title: A novel photoelectrochemical sensor based on molecularly imprinted polymer modified TiO2 nanotubes and its highly selective detection of 2,4-dichlorophenoxyacetic acid.
Publication date: 2011
Journal: Electrochemistry Communications
Volume: 13
Issue: (12)
Page numbers: 1404-1407.
DOI: 10.1016/j.elecom.2011.08.022
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1388248111003389

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 TiO2 nanotubes (TiO2 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
Template and target information: 2,4-dichlorophenoxyacetic acid, 2,4-D
Author keywords: Photoelectrochemical sensor, molecular imprinting, Highly selective, 2,4-D, polypyrrole


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