▎ 摘　　要

NOVELTY - Preparing graphene/activated carbon/titanium dioxide composite porous microspheres comprises (i) adding acidified titanium dioxide nanoparticles, water-soluble carbohydrate into water and stirring to obtain solution, (ii) mixing resultant solution with aqueous solution containing oxidized graphene to obtain composite aqueous solution, (iii) adding potassium hydroxide into composite aqueous solution, adjusting pH of solution and stirring, (iv) subjecting dispersion liquid to atomization drying and (v) subjecting composite powder into carbonization, activated and washing to obtain final product. USE - The graphene/activated carbon/titanium dioxide composite porous microspheres is useful in air purification and water treatment. ADVANTAGE - The composite porous microspheres: have high specific surface area and pore volume, low density, and adsorption and decomposition of formaldehyde and other harmful gases. DETAILED DESCRIPTION - Preparing graphene/activated carbon/titanium dioxide composite porous microspheres comprises (i) adding 0.1-0.5 pts. wt. acidified titanium dioxide nanoparticles, 1-20 pts. wt. water-soluble carbohydrate into water and stirring to obtain solution, (ii) mixing the solution obtained in step (i) with aqueous solution containing 1 pts. wt. oxidized graphene to obtain composite aqueous solution, (iii) adding 5-40 pts. wt. potassium hydroxide into composite aqueous solution obtained in step (ii), then adjusting the pH of the solution to more than 10 and continuously stirring to obtain complex dispersion liquid, (iv) subjecting dispersion liquid obtained in step (iii) to atomization drying to obtain composite powder, and (v) subjecting composite powder obtained in step (iv) into carbonization, activated and washing to obtain final product.