BiNbO4纳米棒的制备及光催化性能研究

采用共沉淀法制备BiNbO4纳米棒。利用X射线粉末衍射仪(XRD)、透射电镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)和热重分析(TG/DTA)对其结构、形貌和性质进行表征,并通过紫外-可见分光光度计分析BiNbO4纳米棒光降解罗丹明B来研究其光催化活性。结果表明以五氧化二铌和五水硝酸铋为原料制备得到正交相结构的BiNbO4纳米棒;BiN-bO4纳米棒具有较高的光催化活性,在紫外光下,pH值=3.05,催化剂用量为2g/L时能够有效地降解罗丹明B,降解率受到光源、催化剂浓度和溶液pH值的影响较大。

Preparation and photocatalytic activity of BiNbO4 nanorods

BiNbO4 nanorods were synthesized by means of a simple co-precipitation method.The as-prepared products were characterized by XRD,TEM,UV-Vis spectrum and TG/DTA.The photocatalytic activities of the BiNbO4 nanorods were tested by the photocatalytic degradation of Rhodamine B.Results indicate that the orthorhombic-structure BiNbO4 nanorods were prepared with Nb2O5 and Bi(NO3)3·5H2O being raw materials.In the photocatalytic reactor,pH=3.05,Rhodamine B could be degraded by 2g/L BiNbO4 thoroughly,which shows good photocatalytic activity.The light source,the dosage of the photocatalysts and the pH value in the solution greatly influenced the degradation rate.