【摘要】 利用静电溶液喷射法,结合浸渍焙烧工艺成功制备了Fe₂O₃/Al₂O₃超细纤维负载型光催化剂。采用SEM、EDS、XRD等技术对其进行表征,以酸性大红（RR 195）的光催化降解为目标反应,评价其光催化活性。结果表明,通过静电溶液喷射方法制备的氧化铝超细纤维毡柔性较好,纤维平均直径为3.78μm。光催化实验表明,当煅烧温度为500℃、铁负载量为195.5mg/g时,催化剂的性能最佳。在紫外光照及H₂O₂存在的条件下,反应120min后,该催化剂对RR 195的脱色率达到95%,3次循环反应后,120min内染料的脱色率可达70%。反应后该催化剂仍然保持良好的纤维形态,易于分离,避免了二次污染。更多还原

【Abstract】 Ultra-fine fibrous Al₂O₃ supported Fe₂O₃ photocatalyst was prepared by an electro-blown spinning（EBS）method combined with impregnation-calcination process,and characterized by techniques such as SEM,EDS and XRD.Photocatalytic degradation of Reactive Red 195（RR 195）in aqueous solution was used as a probe reaction to evaluate the product’s photocatalytic activity.The results showed that flexible and ultra-fine fibrous alumina mat,which is appropriate for photocatalyst supporter and has an average diameter of 3.78μm,can be obtained via electro-blown spinning method.The catalytic experimental results suggested that the optimum photocatalytic performance of the photocatalyst was achieved when the sintering temperature was 500 ℃ and the iron loaded content was 195.5 mg/g.The dye decoloration rate reached 95% within 120 min for the first run with H₂O₂ and UV light,and it can be maintained 70% after three rounds.Moreover,this photocatalyst still maintained good fabric morphology after reaction and was easier to be separated from dye solution,which could avoid the secondary pollution effectively.更多还原