A visible-light driven photoelectrochemical (PEC) sensor based on aptamer immobilized TiO2-Fe2O3 nanotubes was proposed for the first time and highly sensitive and selective bisphenol A determination was realized. Taking advantage of the alloy oxide nanotube structure, high surface area, good biocompatibility, superior photoelectrocatalytic performance, a limit of detection toward BPA as low as 1.8×10¯11M with linearity in the range from 1.8×10-11 to 3.2×10-9M could be achieved. Specificity was greatly exhibited for this aptasensor under 100-fold excess concentration of estriol, resorcinol, nonylphenol, 2,4-D, acetamiprid, chlorpyrifos and omethoate. Simultaneously, satisfactory results were obtained in rea... More
A visible-light driven photoelectrochemical (PEC) sensor based on aptamer immobilized TiO2-Fe2O3 nanotubes was proposed for the first time and highly sensitive and selective bisphenol A determination was realized. Taking advantage of the alloy oxide nanotube structure, high surface area, good biocompatibility, superior photoelectrocatalytic performance, a limit of detection toward BPA as low as 1.8×10¯11M with linearity in the range from 1.8×10-11 to 3.2×10-9M could be achieved. Specificity was greatly exhibited for this aptasensor under 100-fold excess concentration of estriol, resorcinol, nonylphenol, 2,4-D, acetamiprid, chlorpyrifos and omethoate. Simultaneously, satisfactory results were obtained in real water sample investigation from industrial plastics and drinking water. A novel visible-light driven PEC method for highly sensitive and selective detection of BPA was thus established.
