Photo catalyst CoFe2O4–CdS nanocomposites for degradation of toxic dyes: investigation of coercivity and magnetization

Abstract

In this work, firstly CoFe 2 O 4 nanostructures were synthesized via a simple precipitation method. Then cadmium sulphide and CoFe 2 O 4 -CdS nanocomposites were prepared by a fast chemical procedure. The effect of concentration, temperature and precipitating agent on the morphology and particle size of the magnetic products was investigated. The prepared products were characterized by X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. Alternating gradient force magnetometer shows the super-paramagnetic and ferromagnetic property of the ferrite nanostructures. The photocatalytic behaviour of CoFe 2 O 4 -CdS nanocomposites was evaluated using the degradation of three azo dyes (acid black, acid brown and methyl orange) under ultraviolet light irradiation. The results show that nanocomposites have applicable magnetic and photocatalytic performance.

CdS-CoFe2O4@Reduced Graphene Oxide Nanohybrid: An Excellent Electrode Material for Supercapacitor Applications

“…The diffraction pattern of pure CdS was well indexed with the hexagonal structure of CdS . In case of CdS-CoFe, all the peaks corresponding to CdS and as well as CoFe 2 O 4 were observed, which suggested the occurrence of both cubic phase of CoFe 2 O 4 and the hexagonal phase of CdS . Again, the XRD planes in the nanocomposite CdS-CoFe and CdS-CoFe-G are shifted to lower 2θ value, which suggests some interaction of CdS with CoFe and RGO.…”

“…33 In case of CdS-CoFe, all the peaks corresponding to CdS and as well as CoFe 2 O 4 were observed, which suggested the occurrence of both cubic phase of CoFe 2 O 4 and the hexagonal phase of CdS. 34 Again, the XRD planes in the nanocomposite CdS-CoFe and CdS-CoFe-G are shifted to lower 2θ value, which suggests some interaction of CdS with CoFe and RGO. However, the diffraction peaks in case of CdS-CoFe were broadened because of the small size effect.…”

Effect of Annealing Temperature on the Characterizations of Cobalt Ferrite Nanoparticles Synthesized via Co-precipitation

“…Numerous methods have been proposed for synthesizing cobalt ferrite nanoparticles, including hydrothermal routes [3], solvothermal processes [4], thermal decomposition of organometallic complexes [5], and co-precipitation [2,5,6]. However, the properties of cobalt ferrite nanoparticles vary depending on the synthesis technique and reaction conditions.…”