Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 2, Issue 47, Pages 10201-10208Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc02039a
Keywords
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Funding
- National Natural Science Foundation of China [21075092, 21277105]
- Youth Foundation of Science Commission of Yunnan Province [2012FD061]
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A novel molecularly imprinted electrochemical sensor was constructed for the determination of lidocaine, which has a porous and three-dimensional nanostructure. Firstly, dendritic Pt-Pd bimetallic nanoparticles (NPs) and porous Pt nano-networks (NWs) were prepared using hexadecylpyridinium chloride as a structure-directing agent. Then, the dendritic Pt-Pd NPs were embedded onto porous Pt NWs and the resultant mixture was coated on a carboxyl graphene modified glassy carbon electrode. Afterwards, the suspension of aminated multi-walled carbon nanotubes loaded with dendritic Pt-Pd NPs was dropped onto the modified electrode surface to reinforce such porous NW and enlarge electrode surface area. Subsequently, a molecularly imprinted polymer film was fabricated by cyclic voltammetry at the modified electrode, using lidocaine as the template and o-phenylenediamine as the monomer. Under optimal conditions, the obtained electrochemical sensor offered an excellent response for lidocaine, the linear response range was from 5.0 x 10(-9) to 4.8 x 10(-6) mol L-1 and the detection limit was 1.0 x 10(-10) mol L-1. It was successfully applied to the detection of lidocaine in real samples with satisfactory results.
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