摘要
采用共沉淀及微波溶剂热法制备出具有核壳结构的磁性γ-Bi2MoO6/Fe3O4复合可见光催化剂。利用X射线衍射(XRD)、透射电子显微镜(TEM)、紫外可见漫反射光谱(UV-Vis)和振动样品磁强计(VSM)等测试手段表征了试样的结构和性能。结果表明:制备的γ-Bi2MoO6/Fe3O4复合材料具有良好的顺磁性,在外加磁场的作用下,可与液相迅速分离。γ-Bi2MoO6包覆在Fe3O4表面形成的核壳结构使催化剂吸收带边红移,在可见光区的吸收增强;以罗丹明B为目标降解物考察了催化剂的可见光催化降解性能。结果显示:磁性γ-Bi2MoO6/Fe3O4的可见光催化活性优于纯γ-Bi2MoO6。当Fe3O4的质量分数为10%时,光催化活性最好,重复使用3次,对罗丹明B的降解率仍能达到85%。
Magneticγ-Bi2MoO6/Fe3O4 composite materials with core-shell structure were successfully prepared by co-preci- pitation process and microwave solvothermal technique.The structure and properties of as-prepared samples were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, UV-Vis diffuse reflectance spectra （UV-Vis）, and vibrating sample magnetometer （VSM）.Results showed that γ-Bi2MoO6/Fe3O4is of good paramagnetism, which makes it can be dispersed in aqueous solution easily.The core-shell structure with Fe3O4 as the core and γ-Bi2MoO6 as the shell can increase the visible-light absorption of γ-Bi2MoO6.The photocatalytic activities of samples were examined by monitoring the degradation of rhodamine B in an aqueous solution under solar light radiation.Results showed that the photocatalytic activity of magnetic y-BizMoOJFe304 composite photocatalysts was much better than that of pure γ-Bi2MoO6The catalyst showed the highest photocatalytic activity when the mass fraction of Fe3O4 was 10%, and the degradation of rhodamine B could still reach 85% after 3 cycles.
出处
《无机盐工业》
CAS
北大核心
2015年第11期79-82,共4页
Inorganic Chemicals Industry
基金
河南省科技厅重点科技攻关项目(142102210026)
