▎ 摘　　要

NOVELTY - Preparing three-dimensional foam-like reduced graphene/iodine bismuth oxide composite photocatalyst comprises e.g. (i) dispersing polyethylene glycol in deionized water or ethylene glycol, stirring and heating, and dissolving, (ii) dissolving bismuth nitrate pentahydrate in the graphene oxide dispersion solution, adding oxidized graphene dispersion, ultrasonically processing, stirring; (iii) dissolving sodium iodide in de-ionized water, adding into resulting solution, stirring, and (iv) transferring oxidized graphene/bismuth iodide precursor solution into hydrothermal reactor and reacting. USE - The method is useful for preparing three-dimensional foam-like reduced graphene/iodine bismuth oxide composite photocatalyst (claimed). ADVANTAGE - The composite photocatalyst is a one-pot synthesis, low cost, has fixed shape and a specific mechanical strength, is easy to be recycled and circulating, in the visible light region with high light catalytic activity and stability in the environment pollution repairing field has wide application prospect. DETAILED DESCRIPTION - Preparing three-dimensional foam-like reduced graphene/iodine bismuth oxide composite photocatalyst comprises (i) dispersing 2-8 g of polyethylene glycol having a molecular weight of 800-2000 in 40 ml of deionized water or ethylene glycol, stirring and heating to 40-60 degrees C, and dissolving, (ii) dissolving 0.2208-2.677 g bismuth nitrate pentahydrate in the resulting prepared 40 ml graphene oxide dispersion solution, adding 5 ml oxidized graphene dispersion, ultrasonically processing for 15 minutes, then stirring for 2 hours; adding graphene oxide dispersion of solution 2 mg/ml in deionized water; ultrasonic conditions includes the ultrasonic frequency of 40 kHz, and ultrasonic power is 150 W; (iii) dissolving 0.2048-0.2483 g sodium iodide in 40 ml de-ionized water, and adding into the resulting solution, continuously stirring to obtain the graphene oxide/iodine bismuth oxide precursor solution, (iv) transferring the oxidized graphene/bismuth iodide precursor solution into a 100 ml stainless steel hydrothermal reactor containing a polytetrafluoroethylene liner and reacting at 120-180 degrees C for 1-4 hours to obtain a three-dimensional foam sample; and (v) taking out resulting three-dimensional foam sample, and washing with de-ionized water for many times, and vacuum freeze-drying vacuum at condition of -40 degrees C for 4 hours, the vacuum degree is 5 Pa, and drying for 6 hours in vacuum to obtain the three-dimensional foam-like reduced graphene/iodine bismuth oxide composite photocatalyst.