COMPARATIVE INVESTIGATION OF COBALT FERRITE (CoFe2O4) AND CADMIUM FERRITE (CdFe2O4) NANOPARTICLES FOR THE STRUCTURAL, OPTICAL PROPERTIES AND ANTIBACTERIAL ACTIVITY

Digest Journal of Nanomaterials and Biostructures

R. Anusa¹ 

关键词: Cobalt ferrite;    Nanoparticles;    Sol-gel autocombustion;    TGA;    S.Aureus;   

DOI  :  

学科分类：生物技术

来源: Institute of Materials Physics

【 摘 要 】

Sol-gel synthesis of cobalt ferrite (CoFe2O4) and cadmium ferrite (CdFe2O4) nanoparticles in aqueous medium has been carried out using urea. The main advantage of using urea as a by preventing particles agglomeration and act as stabilizing agent to provides long-term stability for cobalt ferrite and cadmium ferrite nanoparticles. The particles have been characterized using X-ray diffraction (XRD), high resolution scanning electron microscopy (HR-SEM), energy dispersive X-ray (EDX), UV-Visible spectra and thermogravimetric analysis (TGA). The XRD and FT-IR results confirmed the crystal structure of CoFe2O4 and CdFe2O4. The formation of CoFe2O4 and CdFe2O4 nano- and microstructures were confirmed by HR-SEM. The optical band gaps of the prepared CoFe2O4 and CdFe2O4with different preparation methods were calculated and were found to be in the range of 2.26 - 2.40 eV. The optical property test indicates that the absorption peak of the nanoparticles shifts towards short wavelength, and the blue shift phenomenon might be ascribed to the quantum effect. The traditional sol-gel approach provides an effective way to synthesize high quality semi-conductive CoFe2O4 and CdFe2O4 nanoparticles. The disk diffusion antibacterial assay of CoFe2O4 and CdFe2O4 nanoparticles was done against E.coli, P.vulgarias MTCC – 49132 (Gram negative) and S.aureus MRSA – 3391, S.Aureus – 25923 (Gram positive) bacteria.

【 授权许可】

Unknown