摘要:
以高炉渣纤维(BFSF)为载体,采用浸渍涂覆法,在BFSF表面负载TiO2,制备BFSF负载TiO2(TiO2/BFSF)复合材料。利用X射线衍射仪(XRD)、Zeta电位和纳米粒度分析仪、N2吸附脱附仪、场发射扫描电镜(SEM)及能谱元素分析(EDS)等近代测试方法对TiO2的晶型、晶粒尺寸、比表面积和TiO2/BFSF的显微结构进行了表征。并用亚甲基蓝(MB)来模拟印染废水,通过亚甲基蓝降解率的高低,评价样品的光催化活性。试验结果表明:TiO2浓度为20 g/L,TiO2悬浮液负载3次时,TiO2均匀覆盖在BFSF四周,紫外光照射180 min时,亚甲基蓝的降解率为94.8%。TiO2/BFSF复合材料重复利用4次,亚甲基蓝的降解率依然能够达到65%。
Abstract:
Composite material(TiO2/BFSF) of TiO2 loaded on blast furnace slag fibre(BFSF) was prepared by impregnation-depositing process using BFSF as the carrier. The crystal form,grain size,specific surface area of TiO2 and microstructure of the composite TiO2/BFSF were characterized by XRD,particle size analyzer and Zeta potential meter,N2 adsorption and desorption instrument,SEM and EDS,respectively.The photocatalysis performances of TiO2/BFSF were evaluated by degradation of methylene blue(MB) simulating dyeing waste water. The results show that with 3 times of impregnation-depositing in 20 g/L TiO2 suspension system,TiO2 can be uniformly coated on the BFSF and 94.8% MB can be degraded by composite TiO2/BFSF under the ultraviolet light irradiation for 180 min.After 4 times of recycle the degradation rate of MB is still maintained at 65%.
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