摘要
通过水热法制备MgFe_2O_4磁性纳米微球,并以其为核包覆TiO2制备新型磁性纳米光催化剂TiO2/MgFe_2O_4;利用扫描电镜（SEM）、透射电镜（TEM）、X-射线衍射仪（XRD）、振动样品磁强计（VSM）表征TiO2/MgFe_2O_4磁性纳米材料的形貌、结构、包覆情况和磁性,并考察了该催化剂在紫外灯照射下对甲基橙模拟废液的脱色效果。结果表明,TiO2/MgFe_2O_4是一种大粒径、中空结构且易于通过磁场回收的光催化剂,TiO2均匀地包覆在MgFe_2O_4微球表面,其粒径为300~400nm,比饱和磁化强度高达45.0emu·g-1;以甲基橙水溶液为模拟废液,紫外光照射120 min后TiO2/MgFe_2O_4对甲基橙的脱色率达到96%。
In this paper, magnetic MgFe2O4 nanoparticles were successfully prepared through a hydrothermal method, then MgFe2O4 nanoparticles were coated by TiO2 to prepare a novel magnetic nano-photocatalyst TiO2/ MgFe2O4. The morphology, structure,coating condition and magnetism of the photocatalyst were characterized by SEM,TEM,XRD,and VSM analysis. The decolorization effect of the photocatalyst against methyl orange simulated wastewater under UV irradiation was investigated. Results indicated that, TiO2/MgFe204 was one kind of photocatalyst with larger size, hollow structure and recyclable by magnetic fields. TiO2 dispersed uni- formly and enwrapped the core MgFe2O4 ,the particle size of composite TiO2/MgFe2O4 was 300-400 nm,and the saturation magnetization was 45. 0 emu . g 1. Using methyl orange aqueous solution as a simulated wastewater,the photocatalytic decolorization rate was up to 96% under UV irradiation for 120 min.
出处
《化学与生物工程》
CAS
2016年第12期51-54,共4页
Chemistry & Bioengineering
基金
陕西省基础教育科研"十二五"规划2014年度课题资助项目(SGH140716)
陕西学前师范学院2016年度校级科研基金资助项目(2016YBKJ069)
