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可见光型纳米Bi3NbO7的制备及光催化性能

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Abstract:

以Nb2O5、Bi(NO3)3?5H2O为原料,采用共沉淀法制备了纳米Bi3NbO7光催化剂,通过X射线衍射、扫描电子显微镜、比表面积及孔径分析和紫外可见漫反射光谱对样品的结构和表面形貌进行了相关表征,并在可见光(λ>400nm)照射下考察样品降解孔雀绿的光催化活性。结果表明焙烧温度低于400℃,或焙烧时间少于8h,均不能形成Bi3NbO7物相。在400℃焙烧8h,所制备的Bi3NbO7具有窄的禁带宽度(2.29eV),较大的比表面积(15.87m2/g)以及适宜的孔径(21.9nm),可见光催化活性最好,150min照射后孔雀绿几乎全部降解,优于商品P25和铌酸催化剂。

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