▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene-thionine-gold nanocomposite material involves subjecting nitrogen-doped graphene, thionine, gold source and reducing agent to ultrasonic reaction under the condition of avoiding light. USE - Preparation of nitrogen-doped graphene-thionine-gold nanocomposite material used in preparation of electrochemical sensor used in detection of diethylstilbestrol and hydrogen peroxide (all claimed). ADVANTAGE - The method enables simple and economical preparation of nitrogen-doped graphene-thionine-gold nanocomposite material. The sensor using the nitrogen-doped graphene-thionine-gold nanocomposite material has excellent accuracy, stability and sensitivity for detection of diethylstilbestrol and hydrogen peroxide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) electrochemical sensor, which contains electrode carrier and a decorative layer containing the nanocomposite material; and (2) preparation of electrochemical sensor.