Journal
IONICS
Volume 26, Issue 6, Pages 3135-3146Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-03260-6
Keywords
Metal-organic framework; Reduced graphene oxide; Bisphenol A; Cetyltrimethylammonium bromide; Electrochemical sensor
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A sensitive electrochemical sensor was fabricated for the rapid determination of bisphenol A (BPA) based on cerium-centered metal-organic framework electrochemically reduced graphene oxide composite (Ce-MOF-ERGO) coupled with cetyltrimethylammonium bromide (CTAB) signal amplification. The Ce-MOF-ERGO was synthesized by electrochemical reduction of Ce-MOF-graphene oxide (GO) composite. Under the optimized conditions, the proposed electrochemical sensor exhibited a linear response for BPA in concentration range 3 nM to 10 mu M with a detection limit of 1.9 nM. The excellent performance of the proposed sensor was attributed to the high conductivity, large surface area, and catalytic activity of Ce-MOF-ERGO composite. Moreover, the oxidation signals of BPA on Ce-MOF-ERGO-modified electrode were further enhanced significantly after addition of CTAB in electrolyte solution. Based on the dual signal amplification strategy, the sensor exhibited high sensitivity for BPA detection and was successfully applied to detect BPA in real samples with good recoveries.
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