Adsorption behavior of three-dimensional magnetic hollow porous Ni-ferrites microsphere for dyes removal

摘要

In this study, the three-dimensional magnetic hollow porous Ni-ferrites (3D-MHP-NiFe2O4) microsphere has been synthesized. As-prepared 3D-MHP-NiFe2O4 exhibits superior adsorption capacities for brilliant green (BG) (147.93 mg g(-1)) and acid carmoisine (AC) (44.07 mg g(-1)). Compared with NiFe2O4 nanoparticles (NiFe2O4-NPs), the enhancement has been ascribed to relatively high specific surface area and unique hollow porous structure, which are favorable for transfer of adsorbates. The Langmuir isotherm model conforms well to the experimental data. The adsorption process obeys the pseudosecond- order kinetic model. The overall rate process has been mainly controlled by intraparticle diffusion. In addition, 3D-MHP-NiFe2O4 exhibits a high stability and good reusability.