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采用静电纺丝法制备了Fe2O3掺杂纳米TiO2的有机无机PVP/Fe2O3-TiO2纤维,经高温焙烧得到Fe2O3-TiO2纳米纤维。利用差动-热重(DSC-TGA)、傅里叶红外光谱(FT-IR)、扫描电镜(SEM)、XRD和比表面积分析仪等对样品进行了表征。以10mg/L亚甲基蓝溶液为底物,研究了Fe2O3掺杂量和焙烧温度等对亚甲基蓝太阳光催化降解效果的影响。结果表明,掺杂量为0.08%、焙烧温度为500℃得到的Fe2O3-TiO2纳米纤维光降解效果最好,达到96.3%,重复使用7次降解率仍在90%以上。
The organic-inorganic PVP / Fe2O3-TiO2 fibers doped with Fe2O3 doped with TiO2 were prepared by electrospinning method and calcined at high temperature to obtain Fe2O3-TiO2 nanofibers. The samples were characterized by DSC-TGA, FT-IR, SEM, XRD and BET. The effect of Fe2O3 doping amount and calcination temperature on the photocatalytic degradation of methylene blue solar cells was investigated using 10 mg / L methylene blue solution as substrate. The results show that the photocatalytic activity of Fe2O3-TiO2 nanofibers with the doping amount of 0.08% and calcination temperature of 500 ℃ is the best, reaching 96.3%, and the degradation rate is still over 90% after 7 times of repeated use.