Molecularly imprinted polymer functionalized flower-like BiOBr microspheres for photoelectrochemical sensing of chloramphenicol
Zhang, Z (Zhang, Zheng)[ 1 ] ; Zhou, HF (Zhou, Haifei)[ 1 ] ; Jiang, CY (Jiang, Caiyun)[ 2 ] ; Wang, YP (Wang, Yuping)[ 1,3 ]*（王玉萍）

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210046, Peoples R China
[ 2 ] Jiangsu Inst Commerce, Dept Engn & Technol, Nanjing 211168, Peoples R China
[ 3 ] Nanjing Univ Sci & Technol, Jiangsu Key Lab Chem Pollut Control & Resources R, Nanjing 210094, Peoples R China

ELECTROCHIMICA ACTA，202006,344,136161

In this study, an ultrasensitive photoelectrochemical (PEC) sensor showing a high selectivity to for chloramphenicol (CAP) was successfully constructed, based on the molecularly imprinted polymers (MIPs) functionalized photoelectrochemically active materials. The 3D flower-like BiOBr with large specific surface area was synthesized by a simple hydrothermal process and was employed as a matrix to graft the MIPs recognition element (denoted as MIPs-PEC). SEM, TEM, FTIR, XPS, XRD and UVevis spectroscopy were used to investigate the microstructure characteristics of the as-obtained MIPs-PEC sensor. During the PEC sensing process, MIPs were prepared via a simple thermal polymerization process provided numerous recognition sites, which improved the sensor's selectivity to CAP. The results showed that photocurrent response signal generated by photo-induced MIPs/BrOBr/ITO electrodes was proportional to the logarithm of CAP concentration over the range from 1.00. 102 to 1.00. 103 ng mL1 with a low detection limit is 3.02 pg mL1 (S/N 1/4 3). MIPs-PEC sensor exhibited high selectivity and stability, low cost, and applicability to the determination of CAP in real samples.

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https://www.sciencedirect.com/science/article/pii/S0013468620305533?via%3Dihub

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