▎ 摘　　要

NOVELTY - Preparing modified graphene bicrystalline-form titanium dioxide photocatalytic materials comprises (i) dissolving urea in water, adding dihydroxybis(ammonium lactato)titanium(IV); (ii) adding graphene oxide in a beaker, pouring the step (i) solution, sealing the beaker and sonicating; (iii) transferring the step (ii) product to a polyfluortetraethylene coated stainless steel autoclave, sealing and placing in an electric furnace; and (iv) cooling the autoclave to room temperature, centrifuging, washing the precipitate, drying, grinding and sintering. USE - The product is useful for photolysis of water, sterilizing and preparing sensitized solar energy battery. ADVANTAGE - The product is stable, resistant to chemical and light corrosion, environmental friendly; and has high photocatalytic activity. DETAILED DESCRIPTION - Preparing modified graphene bicrystalline-form titanium dioxide photocatalytic materials comprises (i) dissolving urea in water, adding 10 ml dihydroxybis(ammonium lactato)titanium(IV), transferring the solution to a flask containing 100 ml water; (ii) adding 20 mg graphene oxide in a beaker, pouring the step (i) solution, sealing the beaker with a preservative film, sonicating for 8-10 hours under 200 watt power, for the dispersion of graphene oxide in dihydroxybis(ammonium lactato)titanium(IV); (iii) transferring the step (ii) product to a 250ml polyfluortetraethylene coated stainless steel autoclave, sealing and placing in an electric furnace at 160 degrees C for 24 hours; and (iv) cooling the autoclave to room temperature, centrifuging at high speed to obtain precipitate, washing the precipitate with deionized water for three times, then drying at 60 degrees C for 24 hours, grinding, sintering at 400 degrees C for 1 hour under hydrogen-nitrogen gas mixture, to obtain the final product.