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- Title
Effect of aluminium doping on structural, optical, photocatalytic and antibacterial activity on nickel ferrite nanoparticles by sol-gel auto-combustion method.
- Authors
Naik, M. Madhukara; Naik, H. S. Bhojya; Nagaraju, G.; Vinuth, M.; Vinu, K.; Rashmi, S. K.
- Abstract
The present work designates the preparation of nanocrystalline nickel ferrite and aluminium-doped nickel ferrite nanoparticles with general formula NiAlxFe2−xO4 (x = 0-0.7) prepared by the sol-gel auto-combustion method. The structural (XRD and FTIR), morphological (SEM with EDAX, HRTEM with SAED) and optical (UV-Visible DRS and Luminescence spectroscopy) properties of the products were characterized. XRD studies revealed the formation of the single phase with a cubic spinel structure with an average crystallite size varies between 19 and 38 nm. The increase in aluminium content caused the variation in the lattice parameter (8.2782-8.3366 Å). SEM images shows the morphology have nanocrystalline behavior with a spherical structure. FTIR represents the characteristic peaks of M-O vibrations in tetrahedral (~ 591 cm−1) and octahedral (~ 398 cm−1) sites. From the UV-Vis DRS spectra, the band gap is decreasing with increasing doping, estimated to be 2.03-1.90 eV. The luminescence spectrum displays violet, blue, green, and orange emission. The aluminium-doped nickel ferrite nanoparticles act as an exceptional photocatalyst for the degradation of rose bengal dye (99.8% in 150 min) with respect to bulk material (63% in 150 min) under visible light (300 W tungsten lamp) irradiation. Furthermore, these nanoparticles were acted against gram-negative bacteria stain (Salmonella typhi, Pseudomonas aeruginosa, and Escherichia coli).
- Subjects
NANOCRYSTALS; NICKEL ferrite; ALUMINUM; NANOPARTICLES; IRON compounds
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 23, p20395
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-0174-y