摘要
采用光引发丙烯酸聚合的方法对Fe3O4纳米粒子进行表面改性,制备了羧基功能化的Fe3O4/聚丙烯酸复合纳米粒子(Fe3O4/PAA);以Fe3O4/PAA为磁核,以硫酸镉和硫代硫酸钠为原料,采用光化学方法制备Fe3O4/聚丙烯酸/CdS复合粒子(Fe3O4/PAA/CdS),并借助红外光谱、X射线粉末衍射、透射电子显微镜、荧光光谱和振动样品磁强计对其进行表征。结果表明,核-壳结构的Fe3O4/PAA/CdS为表面粗糙的球形粒子,平均粒径为155 nm,具有发光性能和准超顺磁性。Fe3O4/PAA/CdS在有机染料罗丹明B的降解实验中显示出良好的可见光催化活性,可以借助磁铁在2 min内从溶液中完全回收。
Poly (acrylic acid)-functionalized magnetic nanoparticles (Fe3O4/PAA) were synthesized by polymerization of acrylic acid initiated by UV light. CdS-modified Fe3O4/PAA composite particles (Fe3O4/PAA/CdS) were photoehemically prepared in aqueous solution containing cadmium sulfate and sodium thiosulfate with Fe3O4/PAA as the magnetic core. The composite particles were characterized by infrared spectroscopy (IR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), photoluminescence measurement (PL), and vibrating sample magnetometer (VSM). The results show that the mean size of Fe3O4/PAA/CdS spheres with core-shell structure and rough surface is about 155 nm and the size distribution is rather wide. The composite spheres also exhibit luminescent and quasi-superparamagnetic properties. Besides, the magnetic composite spheres possess excellent activity as a recyclable photocatalyst for the degradation of Rhodamin B when exposed to visible light irradiation and can be covered by a magnet from aqueous solution within 2 min.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2014年第1期50-57,共8页
Journal of Radiation Research and Radiation Processing
基金
浙江省磁性材料重点创新团队子项目(2011R09006-06)
浙江省自然科学基金(Y4100074)资助
关键词
光化学合成
磁性复合粒子
硫化镉
光催化
Photochemical synthesis, Magnetic composite particle, CdS, Photocatalysis
作者简介
冒卫星,男,1988年11月出生,2011年毕业于安庆师范学院,现为浙江师范大学化学与生命科学学院2011级硕士研究生,有机化学专业
通讯作者:宫培军,博士,副教授,E—mail:skygpj@zjnu.cn