Abstract
A novel electrochemical sensor was designed based on the metal-organic framework (MOF) modified glassy carbon electrode, which can detect trace cadmium (Cd2+) and lead (Pb2+) ions with high sensitivity. A hexagonal lanthanide MOF, ZJU-27 was synthesized by the solvothermal method from Yb(NO3)3·5H2O with 1,3,5-benzenetrisbenzoic acid (H3BTB) in the presence of 2-FBA and then used to modify the glassy carbon electrode. Excellent repeatability, high stability and practical application in real samples for the detection of Cd2+ and Pb2+ were demonstrated by the electrochemical sensor. The sensitivity of the sensor toward Pb2+ was calculated with a detection limit of 0.228 ppb.
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