A self-powered sensor based on molecularly imprinted polymer-coupled graphitic carbon nitride photoanode for selective detection of bisphenol A
Abstract A visible light-induced self-powered sensor for selective detection of bisphenol A (BPA) based on photofuel cell (PFC) was proposed. The PFC was constructed with a Pt cathode and a photoanode which was prepared by modifying fluoride doped tin oxide (FTO) electrode with graphitic carbon nitride (g-C 3 N 4 ) and molecularly imprinted polymer (MIP). The MIP/g-C 3 N 4 /FTO photoanode possessed high photoelectrocatalytic activity of g-C 3 N 4 and binding ability of MIP towards BPA. Under visible light illumination, the PFC generated different output power densities towards varied concentrations of BPA, and thus it was proposed as a self-powered sensor for BPA. The maximum output power density of the sensor was linearly proportional to the logarithm of BPA concentration ranging from 5 to 100 μmol L −1 . Moreover, the proposed self-powered sensor exhibited good selectivity, reproducibility and stability for BPA detection. Highlights A photofuel cell-based self-powered sensor for BPA detection is proposed. MIP is incorporated with g-C 3 N 4 to construct photofuel cell. G-C 3 N 4 serves as photoanode while MIP is used as recognition element. The self-powered sensor exhibits high selectivity towards BTA detection.
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