A label-free photoelectrochemical sensor of S, N co-doped graphene quantum dot (S, N-GQD)-modified electrode for ultrasensitive detection of bisphenol A

Pushing Back the Detection Limit for Photoelectrochemical Sensing of Bisphenol A by Using a Readily Available and Ultrastable BiVO4/ITO Electrode

“…The PEC sensor has unique advantages for measuring BPA because the current caused by the photoelectron transfer is correlated with the oxidation and decomposition of BPA which a potentiostat can quickly record. Also, the photocatalytic process can completely degrade BPA and prevent the accumulation of byproducts that can lead to the phenomenon of concentration polarization on the surface of the electrode and thus allow the measurement of BPA in low concentrations. − Various photoactive materials have been used in PEC sensors for BPA detection. TiO 2 is one of the most common photocatalytic materials used to determine BPA by the PEC method.…”

Carbon-based photoelectrochemical sensors: recent developments and future prospects

“…When present, the target PSA binds to the antigen on the electrode surface, thereby inhibiting the generation of a photocurrent.Existing research on PEC sensing based on GQDs has found wide applications in the detection of contaminants in food and the environment. Chen et al72 improved the quantum yield and charge recombination rate by doping GQDs with nonmetallic S and N heteroatoms. This modification disrupted the electric neutrality of the GQD surface, enhancing its redox ability for the direct PEC determination of bisphenol A in the photoexcited state.…”