▎ 摘　　要

NOVELTY - Preparing wafer/graphene/poly 4-vinylpyridine/polypyrrole-gold nanocomposite material involves using silica-coated silicon wafer as substrate, and then functionalizing amino group to obtain an amino-modified silicon wafer. The ethanolic solution of graphene oxide is dropped on the silica gel seal to obtain wafer/graphene oxide composite. The wafer/graphene oxide composite is soaked into a sealed tube containing 4-vinylpyridine monomer, and then irradiated with ultraviolet light for 30-180 minutes. The wafer is taken out and rinsed with a chloroform solution. USE - Method for preparing wafer/graphene/poly 4-vinylpyridine/polypyrrole-gold nanocomposite material (claimed) for detection of organic small molecules. DETAILED DESCRIPTION - Preparing wafer/graphene/poly 4-vinylpyridine/polypyrrole-gold nanocomposite material involves using silica-coated silicon wafer as substrate, and then functionalizing amino group to obtain an amino-modified silicon wafer. The ethanolic solution of graphene oxide is dropped on the silica gel seal to obtain wafer/graphene oxide composite. The wafer/graphene oxide composite is soaked into a sealed tube containing 4-vinylpyridine monomer, and then irradiated with ultraviolet light for 30-180 minutes. The wafer is taken out and rinsed with a chloroform solution to obtain a silicon wafer/graphene/poly 4-vinylpyridine composite. The silicon wafer/graphene/poly 4-vinylpyridine composite is immersed in an aqueous chloroauric acid solution for 5-6 hours, and then taken out and washed with deionized water to obtain a wafer/graphene/poly 4-vinylpyridine composite. The wafer/graphene/poly 4-vinylpyridine composite is soaked in pyrrole for 10-180 minutes to obtain the desired product.