▎ 摘　　要

NOVELTY - A graphene/polypyrrole nanocomposite modified molecularly imprinted sensor preparing method involves putting graphene oxide in deionized water, sonicating, putting pyrrole monomer in an ice-water bath and stirring. The resulting mixture is put into a PTFE reaction kettle for hydrothermal reaction, centrifuged the obtained material and washed with deionized water and ethanol, and dried to obtain a graphene/polypyrrole nanocomposite material. The graphene/polypyrrole composite material is put in distilled water, followed by preparing graphene/polypyrrole modified carbon electrode by performing cyclic voltammetry cyclic scanning, utilizing the above graphene/polypyrrole/carbon electrode as the working electrode, putting in ethanol, adding nonylphenol and dopamine and mixing, utilizing 8 cycles of cyclic voltammetry to obtain graphene/polypyrrole modified nonylphenol imprinted sensors, placing the obtained blot sensor in an eluent of methanol and acetic acid to elute the template molecule. USE - Method for preparing graphene/polypyrrole nanocomposite modified molecularly imprinted sensor that is utilized for detecting nonylphenol (claimed). ADVANTAGE - The method enables preparing the graphene/polypyrrole nanocomposite modified molecularly imprinted sensor with effectively realizing the effective detection of the nonyl phenol in water, and recovery rate of 92-103%. DETAILED DESCRIPTION - A graphene/polypyrrole nanocomposite modified molecularly imprinted sensor preparing method involves putting 10 mg graphene oxide in 15 mL deionized water, and sonicating for 1 hour to make the evenly mixed graphene oxide dispersion, putting 1 mL pyrrole monomer in an ice-water bath and stirring vigorously for 2 hours. The resulting mixture is put into a PTFE reaction kettle at 120 degrees C for hydrothermal reaction for 12 hours, centrifuged the obtained material and washed with deionized water and ethanol for three times, and dried in a freeze dryer to obtain a graphene/polypyrrole nanocomposite material. The 10 mg graphene/polypyrrole composite material is put in 10 mL distilled water to form a uniform dispersion, followed by preparing graphene/polypyrrole modified carbon electrode by performing cyclic voltammetry cyclic scanning for ten times, and utilizing the above graphene/polypyrrole/carbon electrode as the working electrode, putting in 25 mL ethanol, adding 0.05 g nonylphenol and 5.0 mmol dopamine and mixing well, utilizing 8 cycles of cyclic voltammetry to obtain graphene/polypyrrole modified nonylphenol imprinted sensors, placing the obtained blot sensor in an eluent of methanol and acetic acid to elute the template molecule with the ratio of methanol to acetic acid in the eluent of 7:3, and the elution time of 8 minutes.