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以高炉渣纤维(BFSF)为载体,采用浸渍涂覆法,在BFSF表面负载TiO_2,制备BFSF负载TiO_2(TiO_2/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TiO_2的晶型、晶粒尺寸、比表面积和TiO_2/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:TiO_2浓度为20 g/L,TiO_2悬浮液负载3次时,TiO_2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%。TiO_2/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%。
Using BFSF as carrier, the BFSF was loaded with TiO 2 on the surface of BFSF by impregnation method to prepare TiO 2 / BFSF composites. In this paper, the crystal structure of TiO_2, the crystal grain size, the crystal grain size and the crystal structure of the crystal were characterized by X-ray diffraction (XRD), Zeta potential and nanoparticle size analyzer, N2 adsorption desorption spectrometer, field emission scanning electron microscope (SEM) and energy spectrum elemental analysis (EDS) Size, specific surface area and the microstructure of TiO 2 / BFSF were characterized. The methylene blue (MB) was used to simulate the printing and dyeing wastewater. The photocatalytic activity of the samples was evaluated by the degradation rate of methylene blue. The results showed that the degradation rate of methylene blue was 94.8% when the concentration of TiO 2 was 20 g / L and the TiO 2 suspension was loaded for 3 times. TiO 2 / BFSF composites were reused 4 times, the degradation rate of methylene blue was still 65%.