Affiliation:
1. Universitas Gadjah Mada
2. Nagoya University
Abstract
Nickle zinc ferrite (NiZnFe2O4) magnetic nanoparticle (MNPs) has been successfully synthesized using co-precipitation method. NiZnFe2O4 was coated SiO2 (NiZnFe2O4/SiO2) using Stöber method with various concentrations of (5%, 10%, 15%, 20%, 30%, and 50%). MNPs sample has a spinel ferrite phase confirmed by X-ray diffraction (XRD) measurements. The results of the functional group analysis performed using Fourier transform infrared (FTIR) showed an M-O tetrahedral vibrational bond found a wavelength of 347 cm-1. After coated silica, Si-O-Si vibrational bonds appear at wavelengths of 1033.85 cm1. Magnetic properties were measured using vibrating Sample Magnetometer (VSM), the result shows that has maximum saturation magnetization of NiZnFe2O4 22.5 emu.gram-1 and decreased to 16.9 emu.gram-1 after coating. In figure 1 show that the photodegradation activity of MNPs was carried out with a variation of irradiation time. Result of the photodegradation activity of methylene blue shows that NiZnFe2O4/SiO2 are higher than NiZnFe2O4. Sample of NiZnFe2O4/SiO2 has the highest photodegradation rate up to 96%. The existence of SiO2 layer on the surface of bare MNPs increases the surface reactivity of samples.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
9 articles.
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