▎ 摘　　要

NOVELTY - A graphene/polyaniline nanotube composite material comprises graphene coated on the surface of the polyaniline nanotubes with nano-tubular structure, inner diameter of 50-1000 nm, outer diameter of 200-1500 nm and length of 0.1-20 mu m. USE - Graphene/polyaniline nanotube composite material is useful in electrochemical sensor device for simultaneous detection of phenolic compounds such as phenol, p-nitrophenol, bisphenol A, 2-cresol, 4-chlorophenol and p-cresol in water bodies (all claimed). ADVANTAGE - The graphene/polyaniline nanotube composite material detects phenolic compounds with high selectivity and sensitivity, is environmentally-friendly, and can be prepared in simple manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene/polyaniline nanotube composite material, which involves mixing polyaniline nanotube dispersion liquid and graphene oxide dispersion liquid, stirring for 12 hours, centrifuging, washing and drying under vacuum.