Sr2FeMoO6的微波合成及对酸性黑10B的降解性能研究

以MnO2为微波吸收剂,SrCO3、Fe2O3、MoO3为原料,采用微波烧结法合成了双钙钛矿型复合氧化物Sr2FeMoO6。通过X射线衍射仪对样品的物相结构进行了分析表征,采用标准四引线法测量了样品在零场下的电输运性质,采用紫外可见分光光度计测试了样品降解酸性黑10B的活性。结果表明:Sr2FeMoO6为四方晶系结构,空间群为I4/mmm,晶胞参数为:a=0.558 7nm,c=0.789 4nm,晶胞体积V=0.246 4nm3;在80～300K温度范围内,呈现典型的半导体性质。样品Sr2FeMoO6对酸性黑10B有很高的降解活性,在适宜条件下,脱色率可达98%左右。同时对脱色机理进行了探讨。

Study on synthesis of Sr2FeMoO6 by microwave sintering method and its degradation activity for dye acid black 10B

With MnO2 as microwave absorbent,double perovskite Sr2FeMoO6 was synthesized by microwave sintering method using SrCO3,Fe2O3 and MoO3 as raw materials.The crystal structure and phase purity of the samples were examined by XRD.Electrical transport properties were determined by a standard four-probe DC method.Degradation activity of Sr2FeMoO6 for dye acid black 10B were measured by a UV-Vis spectrophotometer.The resuts showed that the as-synthesized sample is Sr2FeMoO6 with tetragonal crystal structure and I4/mmm space group,and unit cell parameter was a=0.558 7nm,c=0.789 4nm and volume=0.246 4nm3.The sample exhibited typical semiconductor behavior in the temperature range of 80-300K.The sample Sr2FeMoO6 showed excellent degradation activity for dye acid black 10B,the decolorizing rate can reach to 98%.Meanwhile,the decolorization mechanism was discussed.