壬基酚分子印迹二维光子晶体水凝胶传感器

A molecularly imprinted two-dimensional photonic hydrogel sensor that can specifically recognizes nonylphenol（NP）was obtained by UV photoinitiated polymerization using polystyrene two-dimensional photonic crystal as template，NP as imprinted molecule，methanol as solvent，methacrylic acid as functional monomer，ethylene glycol dimethacrylate（EGDMA）as crosslinker，and 2，2-diethoxyacetophenone（DEAP）as initiator. The response performance of the sensor was determined by measuring the change in the diameter of the Debye diffraction ring（ΔD）. In the NP solution，the volume expansion of the hydrogel leads to the increase of the particle spacing of the photonic crystal in the gel，which leads to the decrease of the diameter of Debye diffraction ring. As the concentration of NP in the solution increases from 0 to 1×10^‒5 mo/L，the diameter of Debye diffraction ring decreases by 8.0 mm，and the particle spacing of the corresponding photonic crystal increases by 25.1 nm. In the NP concentration range of 1×10^‒13—1×10^‒8 mol/L，the change of Debye diffraction ring is linearly related to the logarithm value of NP concentration（lgc）. In addition，the detection limit of NP molecularly imprinted two-dimensional photonic crystal hydrogel sensor is as low as 1×10^‒13 mol/L，which has high sensitivity，good specificity recognition ability and stable reusability，and can realize the visual detection of nonylphenol.