Structural, magnetic and electrical properties of zinc doped nickel ferrite and their application in photo catalytic degradation of methylene blue

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• 作者：Rimi Sharma ; Sonal Singhal ; ^{sonal1174@gmail.com}
• 关键词：Photo catalytic degradation ; Ferrites ; Magnetic measurements and methylene blue
• 刊名：Physica B
• 出版年：2013
• 出版时间：1 April, 2013
• 年：2013
• 卷：414
• 期：Complete
• 页码：83-90
• 全文大小：1053 K

文摘

The sol-gel process was used to synthesize zinc doped nickel ferrite Zn_xNi_1?xFe₂O₄ (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) to investigate the effect of Zn doping on structural, electrical and magnetic properties of Ni ferrite. The application of synthesized ferrite was also studied in the photo degradation of methylene blue. X-Ray diffraction studies confirmed the formation of cubic spinel structure for all the annealed samples. In Fourier Transform Infrared spectra, two fundamental absorption bands at ¡«580 cm^?1 and ¡«430 cm^?1; characteristic of M-O vibrations were observed. Particle size evaluated using transmission electron microscopy was found to be in the range 15-20 nm for the samples annealed at 1000 ¡ãC. The saturation magnetization increased up to x=0.4 and then it decreased, while coercivity was found to decrease with increasing Zn concentration. A continuous increase in DC electrical resistivity was observed with increasing Zn content which may be due to decrease in Fe²⁺-Fe³⁺ hopping. An increase in photo catalytic degradation of methylene blue was observed with increasing Zn doping.