Solvothermal Synthesis of Hierarchical Colloidal Nanocrystal Assemblies of ZnFe₂O₄ and Their Application in Water Treatment.

ABSTRACT: Hierarchical colloidal nanocrystal assemblies (CNAs) of ZnFe₂O₄ have been synthesized controllably by a solvothermal method. Hollow ZnFe₂O₄ spheres can be formed with the volume ratios of ethylene glycol to ethanol of 1:4 in the starting systems, while solid ZnFe₂O₄ CNAs are obtained by adjusting the volume proportion of ethylene glycol to ethanol from 1:2 to 2:1. Magnetometric measurement data showed that the ZnFe₂O₄ CNAs obtained with the volume ratios of 1:2 and 1:1 exhibited weak ferromagnetic behavior with high saturation magnetization values of 60.4 and 60.3 emu·g-1, respectively. However, hollow spheres showed a saturation magnetization value of 52.0 emu·g-1, but the highest coercivity among all the samples. It was found that hollow spheres displayed the best ability to adsorb Congo

SUBMITTER: Guo P 

PROVIDER: S-EPMC5456613 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature