▎ 摘　　要

NOVELTY - Catalytically synthesizing diphenyl ether compound comprises: (1) mixing halogenated benzene compound, phenolic compound, alkali and tetrahydrofuran at a molar ratio of 1:(1-2):(1-2):(5-20), and adding 0.1-20 mass% of cuprous oxide to the mixture and then performing ultrasonic dispersion of the mixture in the presence of graphene catalyst for 5-240 minutes to obtain a suspension; and (2) stirring the suspension under an oxygen-free atmosphere and then heating at a temperature of 50-300 degrees C and normal pressure, and reacting the mixture for 0.5-5 hours. USE - The method is useful for catalytically synthesizing diphenyl ether compounds (claimed). ADVANTAGE - The method is capable of eco-friendly and economically synthesizing the diphenyl ether compounds with high catalytic efficiency and yield.