With TiC14 as the raw material, fly ash microsphere as the support, Fe3+ -TiO2/bead photocatalyst is prepared by reverse microemulsion. The influence of doping-amount and the recycle number on photocatalytic performance of Fe3 +-TiO2/bead photocatalyst are studied. The particles surface morphology is observed with scanning electron microscopy ( SEM ). The content of the finite element of the particles is analyzed by EDS. The degradation rate of methylene blue is determined by spoctrophotometer. The results show that catalysts have a higher degradation capacity for methylene blue when the Fe3 + doping amount at O. 25％. The surface roughness of the catalyst particle with grows up the increase of regeneration times due to the agglomeration of the Fe3 + -TiO2, which decreases the photocatalytic degradation performance . After three times regeneration, the catalyst has to be scrapped.%以TiCl4为原料,粉煤灰微珠为载体,采用微乳液法制备了负载型Fe3+掺杂纳米TiO2光催化剂.并研究了不同掺杂量Fe3+-TiO2/粉煤灰微珠光催化剂的催化性能及回收再生次数.用扫描电子显微镜(SEM)观察粒子的形貌,用能谱仪(EDS)分析了催化剂的元素含量,用分光光度计测定了催化剂对次甲基蓝的降解率.结果表明:Fe3+掺杂量为0.25%时催化剂的光催化降解性能最高;回收催化剂随着其再生次数增加,Fe3+-TiO2在粒子表面上聚集长大,活性表面积降低,催化降解性能下降;催化剂经3次再生后报废.
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