以Fe3O4和Nb2O5为原料,采用固相反应法制备铌酸铁光催化剂,评价了其光催化降解甲基橙的活性.研究了n(Fe):n(Nb)、煅烧温度、光催化剂质量浓度和光催化反应时间对光催化降解率的影响.700℃以下的煅烧产物中生成了FeNb2O6,800℃以上的煅烧产物中生成了FeNbO4.将n(Fe):n(Nb)为0.8的Fe3O4和Nb2O5在700℃煅烧8h可以制备出活性最佳的铌酸铁光催化剂.NiO的掺杂不能提高铌酸铁的光催化能力.当ρ(甲基橙)为10mg/L,ρ(光催化剂)为4 g/L时,光催化降解效率最大,光照时间为180 min时,甲基橙的η(降解率)为72.7%.
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