磁性Bi2WO6-Fe3O4复合微球的制备及吸附性能研究  

Research on Synthesis and Adsorption Property of Bi_2WO_6-Fe_3O_4 Magnetic Composite Microspheres

作　　者：朱圣 江向平 李菊梅 陈超 涂娜 陈云婧 

机构地区：[1]景德镇陶瓷大学 材料科学与工程学院 江西省先进陶瓷材料重点实验室,景德镇333001

出　　处：《中国陶瓷》2017年第2期20-27,共8页China Ceramics

基　　金：国家自然科学基金(51562014,51262009);江西省自然科学基金(20133ACB20002,20142BAB216009);江西省高等学校“先进陶瓷材料”科技创新团队;景德镇陶瓷大学研究生创新资金(JYC201515)资助

摘　　要：用水热法合成了类花状结构的Bi_2WO_6-Fe_3O_4磁性微球。SEM和TEM照片显示复合微球由直径约为260 nm的Fe_3O_4颗粒镶嵌于直径为2~3μm的Bi_2WO_6微球体上。BET表征显示其比表面积为20.12 m^2/g,具有明显的介孔结构。VSM表征显示其磁饱和强度为6.1 emu/g,具有快速的磁响应性能。探讨了Bi_2WO_6-Fe_3O_4磁性微球对甲基橙的吸附性能,表明在25℃条件下对甲基橙(20 mg/L)的去除率为91.64%,吸附动力学遵循准二级动力学方程,吸附等温线符合Langmuir方程,最大饱和吸附量为20.67 mg/g。The flower-like Bi2WO6-Fe3O4 microspheres were synthesized by hydrothermal method. SEM and TEM images indicated that Fe3O4 nanoparticles with a average diameter of 260 nm were successfully immobilized on the surface of Bi2WO6 microspheres with an average diameter of 2- 3 μ m. BET result revealed that the sample had a specific surface area value of 20.12 m^3/g and an obvious mesoporous structure. The magnetic saturation intensity was 6. lemu/ g according to VSM characterization, demonstrating a rapid magnetic response. The adsorption property for methyl orange（MO） of Bi2WO6-Fe3O4 microspheres was further discussed. Results declared that the removal rate of （20 mg/L） MO reached 91.64% under 25℃, the adsorption kinetics followed pseudo-second order kinetics equation, the adsorption isotherm conformed to the Langmuir equation and the maximum saturated adsorption capacity was 20.67 mg/g.

关 键 词：水热法 Bi2W06-Fe304 甲基橙 磁性复合微球 

分 类 号：TQ174.758.2[化学工程—陶瓷工业]