纳米四氧化三铁降解亚甲基蓝的研究

Study on Degradation of Methylene Blue by Fe_3O_4 Nanoparticles

在浸没循环撞击流反应器中通过共沉淀法,以氨水为沉淀剂,以FeCl3.6H2O和FeSO4.7H2O为原料制备了磁性纳米Fe3O4粒子。采用XRD、TEM等多种方法对制得的纳米粒子的结构和性能进行了表征,并研究了磁性纳米Fe3O4粒子对亚甲基蓝的降解作用。结果表明,纳米Fe3O4粒子具有相对较小的粒径;当溶液pH值为4.2、H2O2加入量为2 mL.L-1时,用0.9 g.L-1的Fe3O4悬浊液对10 mg.L-1的亚甲基蓝溶液进行降解,5 min内亚甲基蓝的降解率可达96.5%。

In submerged circulative impinging stream reactor,the Fe3O4 magnetic nanoparticles was prepared by co-precipitation with FeCl3·6H2O and FeSO4·7H2O as reactants,ammonia as the precipitator.The Fe3O4 nanoparticles were characterized by X-ray diffraction（XRD） and transmission electron microscopy（TEM）,and the degradation of methylene blue（MB） with Fe3O4 magnetic nanoparticles was studied.The results showed that：Fe3O4 nanoparticles had relatively small particle size;when pH value was 4.2,H2O2 addition dosage was 2 mL·L-1,Fe3O4 concentration was 0.9 g·L-1,the concentration of MB was 10 mg·L-1,the degradation rate of MB could reach 96.5% in 5 min.