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固相反应法制备CuNb2O6的光催化降解甲基橙活性

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Abstract:

采用固相反应法制备铌酸铜光催化剂,评价其光催化降解甲基橙的活性。研究摩尔比n(Cu)/n(Nb)、煅烧温度、煅烧时间、光催化剂浓度和光催化反应时间对光催化降解率的影响。结果表明将n(Cu)/n(Nb)=11的CuCO3·Cu(OH)2·H2O和Nb2O5在800℃煅烧5h,可以制备出光催化活性最佳的铌酸铜。扫描电镜和X射线衍射结果显示制备的铌酸铜为近似圆球形颗粒,物相为CuNb2O6,晶粒尺寸为103nm。煅烧时间延长并不能促使CuNb2O6晶体长大。当CuNb2O6浓度为6g/L时,催化剂的光催化降解效率最大。

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