Abstract: A novel and highly sensitive visible-light photoelectrochemical (PEC) sensor for the detection of 2,4-D has been developed using a nanocomposite of molecularly imprinted gold nanoparticles-polypyrrole polymer (MIP) modified BiOI nanoflake arrays (BiOINFs) as a photoactive electrode (labeled as MIP@BiOINFs). Our results demonstrate that the smart combination of BiOINFs with MIP offers a high-performance photoactive sensing platform. It features the intrinsically excellent visible-light responsive properties of BiOI and prominent recognition ability from MIP. The designed MIP@BiOINF composite dramatically facilitates the PEC determination of 2,4-D. The detection limit for 2,4-D is found to be as low as about 0.04 ng mL-1 (S/N = 3). Moreover, the resulting sensor could be used to detect 2,4-D in spiked soil samples
Template and target information: 2,4-dichlorophenoxyacetic acid, 2,4-D
Author keywords: 2,4-dichlorophenoxyacetic acid, Photoelectrochemical sensor, BiOI nanoflake array, molecularly imprinted polymer