中文摘要：

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4g/L时,光催化降解效率最大,光照时间为180min时,甲基橙的η（降解率）为72.7%。

英文摘要：

The solid state reaction was employed to prepare iron niobate photocatalysts with Fe3O4 and Nb2O5 as the raw materials and their activities were evaluated by photocatalytic degradation experiments of methyl orange.The impacts of n（ Fe） ∶n（ Nb） ,calcination temperature,photocatalyst concentration and irradiation time on photocatalytic degradation efficiencies were investigated.FeNb2O6 was produced by a calcination treatment below 700℃ and FeNbO4 was produced above 800℃.Iron niobate with optimum activity could be prepared by a calcination treatment at 700℃ for 8 h and n（ Fe） ∶n（ Nb） was 0.8.Doping of NiO could not promote photocatalytic performance of iron niobate.When ρ（ methy 1 000 mge） = 10mg/L,the optimum concentration of photocatalyst was 4 g/L,with which methyl orange degradation rate was 72.7% after 180 min of irradiation.