▎ 摘　　要

NOVELTY - A copper-based composite is prepared by dissolving graphene oxide in deionized water, ultrasonically processing to completely disperse, taking copper source compound as copper source, dissolving in graphene solution, dissolving 8-12 mol/L sodium hydroxide, orderly dropping little ethylenediamine solution and micro hydrazine hydrate (80%) solution to obtain graphene sheet with different length-diameter ratio of copper nanorod, reacting in water bath or oil bath at holding temperature of 50-90degrees Celsius, reacting for 0.5-4 hours, putting in tubular furnace, and reacting to 100-200degrees Celsius for 1-4 hours at rate of 3-10degrees Celsius/minute to obtain copper-copper(II) oxide-graphene oxide, copper oxide-copper(I) oxide-graphene oxide and copper-copper(I) oxide-graphene oxidenano rod. USE - The method is used for preparing copper-based composite used for absorbing organic anionic dye and in water purification field (all claimed). ADVANTAGE - The product has excellent adsorption effect.