▎ 摘　　要

NOVELTY - Method of photo-thermal synthesis of zinc oxide powder involves (1) preparing a precursor solution by preparing an aqueous solution with a zinc acetate concentration of 0.1 mol/l, dripping aqueous ammonia while stirring, changing the solution from colorless to milky white to become colorless clear transparent aqueous solution, adjusting pH to 10-10.2 and forming a colorless and transparent aqueous solution, (2) preparing a graphene oxide powder by using coffee grounds and a light-absorbent graphene oxide, (3) preparing graphene oxide composite zinc oxide powder by using the graphene oxide powder as a light absorber to absorb laser to generate heat and heating the precursor aqueous solution prepared in the step (1) to synthesize graphene oxide composite zinc oxide powder and (4) high temperature sintering and purifying. USE - The method is useful for photo-thermal synthesis of zinc oxide powder. ADVANTAGE - The method utilizes the characteristic of light absorber to absorb light to generate heat, adjusts the temperature of the photothermal conversion process by adjusting the content of the light absorber, can directionally control oxidative synthesis under low temperature conditions through a self-heating mode in the liquid-phase system and adopts simple and convenient process. DETAILED DESCRIPTION - Method of photo-thermal synthesis of zinc oxide powder involves (1) preparing a precursor solution by preparing an aqueous solution with a zinc acetate concentration of 0.1 mol/l, dripping aqueous ammonia while stirring, changing the solution from colorless to milky white to become colorless clear transparent aqueous solution, adjusting pH to 10-10.2 and forming a colorless and transparent aqueous solution, (2) preparing a graphene oxide powder by using coffee grounds and a light-absorbent graphene oxide, (3) preparing graphene oxide composite zinc oxide powder by using the graphene oxide powder as a light absorber to absorb laser to generate heat and heating the precursor aqueous solution prepared in the step (1) to synthesize graphene oxide composite zinc oxide powder and (4) high temperature sintering and purifying by transferring the graphene oxide composite oxidized zinc powder prepared in step (3) into a high temperature resistant glass dish and placing in a tubular furnace for sintering to remove carbon in the oxidized graphene composite zinc oxide powder to obtain purified zinc oxide powder.