Bi_(1-x)Y_(x)FeO_(3)纳米粉末制备及其光催化降解刚果红的研究

Study on the preparation of Bi_(1-x)Y_(x)FeO_(3)nano-powder and its photocatalytic degradation of Congo red

采用溶胶-凝胶法制备了掺杂Y的BiFeO_(3)纳米粉末,利用XRD、SEM、FTIR、UV-Vis、VSM等对其进行表征分析,并在室温下进行光催化降解刚果红实验,研究不同的Y掺杂量对BiFeO_(3)粉末的结构、光学及磁性等的影响。结果表明,Y的掺杂可以抑制BiFeO_(3)晶体生长,减小晶粒尺寸,对BiFeO_(3)磁性及带隙也有一定的影响。适当的Y掺杂量可以提高BiFeO_(3)对刚果红溶液的光催化降解效率。其中,掺杂Y的量为5%、在500℃下煅烧2 h时所得的BiFeO_(3)材料催化效果最好,比纯BiFeO_(3)的催化效果提高了56%。

Y-doped BiFeO_(3) nanopowders were prepared by a sol-gel method,its characterization and analysis were made by using XRD,SEM,FTIR,UV-Vis,VSM and photocatalytic degradation of Congo red was carried out at room temperature,the effects of different Y doping on the structure,optics and magnetism of BiFeO_(3) powders were studied.The results show that the doping of Y can inhibit BiFeO_(3) crystal growth and reduce the grain size of BiFeO_(3) powders,which also has a certain effect on BiFeO_(3) magnetism and band gap.The photocatalytic degradation efficiency of Congo red solution can be improved by a proper Y-doped BiFeO_(3) powders.And when the amount of doped Y is 5%and calcined at 500℃for 2 h,the BiFeO_(3) material has the best catalytic effect,56%more than pure BiFeO_(3) catalytic effect.