▎ 摘　　要

NOVELTY - Synthesizing graphene oxide grafted with p-cyanophenyl azo comprises (i) adding the para-cyanoaniline into dilute hydrochloric acid solution, heating, dissolving, cooling down, dropping sodium nitrite, maintaining temperature a, adding urea after reaction time b and stirring to obtain diazonium salt solution; (ii) adding the oxidized graphene into water, preparing the aqueous solution of graphene oxide, adjusting the pH of the solution, adding the diazonium salt solution into the aqueous solution of graphene oxide, stirring, heating, coupling at time c, cooling, filtering, drying and purifying. USE - The method is useful for synthesizing graphene oxide grafted with p-cyanophenyl azo is useful for providing a wave-absorbing material with beneficial wave-absorbing ability. ADVANTAGE - The method: is simple and convenient; and can solve the problems of high density, poor corrosion resistance, low reflection loss and the like existing in the current wave-absorbing material.