G／TiO2／CoFe2O4磁性复合光催化材料的制备及光催化降解亚甲基蓝

摘要

Graphene oxide ( GO ) was synthesized from natural flake graphite via a modified Hummers method.G/TiO2/CoFe2 O4 ternary nanocomposite was synthesized from CoFe2 O4 via hydrothermal method,while CoFe2 O4 was synthesized from FeCl2 and FeCl3 via coprecipitation method.The synthetic production ( GO and G/TiO2/CoFe2O4composite materials) was characterized by using FT-IR,XRD,AFM,TEM.Then compared the effect on the degradation of methylene blue under the condition of UV irradiation among G/TiO2 , TiO2/CoFe2 O4 ,G/CoFe2 O4/TiO2 composite materials.After catalyzing 40 min,the decolorization rate could reach up to 90%.The result suggests that the catalytic efficiency of photocatalytic degradation of methylene blue by G/CoFe2 O4/TiO2 composite material is significantly greater than by pure G/TiO2 and TiO2/CoFe2 O4 .Therefore, G/CoFe2 O4/TiO2 composite material shows more opportunities for application in photocatalytic degradation of dye wastewater.%以天然鳞片石墨为原料，用改进的Hummers法氧化制备氧化石墨烯；以FeCl2，FeCl3为原料，用共沉淀法合成CoFe2 O4；再用一步水热合成法制备G／TiO2／CoFe2 O4三元纳米复合材料．用FT-IR、XRD、AFM、TEM对氧化石墨烯和G／TiO2／CoFe2 O4复合材料进行表征，并在紫外光照下对比G／TiO2，TiO2／CoFe2 O4，G／TiO2／CoFe2 O4复合材料对亚甲基蓝的降解效果．结果表明，在紫外光照射下， G／TiO2／CoFe2 O4复合材料光催化降解亚甲基蓝的催化效率明显大于单纯G／TiO2，TiO2／CoFe2 O4，光催化40 min后，脱色率达90％．G／TiO2／CoFe2 O4复合材料不失为一种有潜力的光催化降解染料废水催化材料．