ABSTRACT
A novel molecularly imprinted electrochemical sensor based on nitrogen-doped molybdenum carbide(N-Mo2 C) nanosphere was fabricated for trace analysis of resveratrol in this work. N-Mo2 C with large specific surface area and good electrical conductivity was introduced to construct a sensitive imprinting platform. Molecularly imprinted polymer film was prepared through a simple electropolymerization method using resveratrol as the template molecule and o-phenylenediamine as the functional monomer. The sensor shows great analytical performance in the concentration range of 10-9 â mol L-1 to 10-4 â mol L-1 and the detection limit is as low as 4.37×10-10 â mol L-1 . The sensor also has the advantages of good selectivity, reproducibility and stability, which opens a new way for the application of molecularly imprinted electrochemical sensors in the field ofbiomedicine detection.
Subject(s)
Molecular Imprinting , Nanospheres , Molecular Imprinting/methods , Electrochemical Techniques/methods , Resveratrol , Nitrogen/chemistry , Polymers/chemistry , Reproducibility of ResultsABSTRACT
SnO2 -CNF was prepared by coaxial blending technology, and MoS2 was grown uniformly on SnO2 -CNF composite by adding a hydrothermal post-treatment step. The uniform distribution of MoS2 on one-dimensional SnO2 -CNF can effectively establish a layered three-dimensional structure. Accordingly, the prepared MoS2 -coated SnO2 -CNF composite material has higher surface area and more active sites to obtain better electrochemical performance. We constructed an electrochemical sensor within the composite material with enhanced performance to realize the simultaneous and highly sensitive detection of phenacetin and indomethacin. The sensor has linear ranges of 0.050-7200â µM and 0.05-500â µM, respectively, and the detection limits were 0.016â µM and 0.013â µM. Furthermore, the sensor has good anti-interference ability and stability, which also achieves good recovery rate in the actual sample detection.
