Search

In this study, a novel one-step hydrothermal method was developed and composite material of CoFe 2 O 4 /graphene-like carbons (LGC) was successfully prepared from pomelo peels (PP), Fe(NO 3 ) 3 ·9H 2 O and Co(NO 3 ) 2 ·6H 2 O. The characterizing results demonstrate that during the hydrothermal process, (Fe 3+ + Co 2+ ) ions adsorbed on the active surface of PP and PP catalyze/prompt the conversions of PP to LGC and (Fe 3+ + Co 2+ ) to CoFe 2 O 4 , respectively, to produce the composite CoFe 2 O 4 /LGC. And CoFe 2 O 4 /LGC is nanosized and made of multilayer nanosheets. Its improved adsorptive property for methylene blue (MB) in water is ascribed to the conversion of PP to LGC and exfoliation of PP sheets to nanosheets. Additionally, the composite can be easily and rapidly separated under an external magnetic field and repeatedly used. MB adsorption on CoFe 2 O 4 /LGC follows pseudo-second-order kinetics model and Langmuir isotherm models. The synthesis is of simpleness, speediness, low cost, and green non-pollution. CoFe 2 O 4 /LGC is an ideal adsorbent candidate. [ABSTRACT FROM AUTHOR]

In this work, a novel template-assisted solvothermal method (TASTM) was used to prepare cobalt ferrite (CoFe 2 O 4 ) magnetic fiber nanomaterial. Cotton fibers (CF) were used as template and Fe(NO 3 ) 3 ·9H 2 O, Co(NO 3 ) 2 ·6H 2 O as Fe and Co sources and EtOH as the solvent. XRD result indicates that the sample is single phase of CoFe 2 O 4 with the spinel-type structure. SEM and TEM results reveal that the sample is hollow fibers and the wall is porous. The magnetic measurements result demonstrates that the sample shows enhanced magnetic property. These experimental results suggest that the template CF play an important role in the formation, crystalline structure, morphology and magnetic property of CoFe 2 O 4 . The synthesis is simple, low-cost and environment-friendly. [ABSTRACT FROM AUTHOR]