Cetyltrimethylammonium Bromide (CTAB) Surfactant-Assisted Synthesis of BiFeO{sub 3} Nanoparticles by Sol-Gel Auto-Combustion Method

Journal Article · Mon Oct 15 04:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4596-9· OSTI ID:22773721

Ahmadi, P.; Mirkazemi, S. M. ^[1]

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1. Iran University of Science and Technology (IUST), School of Metallurgy and Materials Engineering (Iran, Islamic Republic of)

In this research, BiFeO{sub 3} nanoparticles were synthesized by sol-gel auto-combustion method with and without the addition of cetyltrimethylammonium bromide (CTAB) surfactant. The effect of different amounts of CTAB addition (0, 1.5, 3, and 6 wt.%) on phase constituents, microstructure, and magnetic properties of the synthesized samples were evaluated using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and vibration sample magnetometer (VSM). Also, BiFeO{sub 3} nanoparticles were used for the degradation of methylene blue (MB) as a typical dye pollutant under UV irradiation. XRD results showed the formation of BiFeO{sub 3} mainly with some minute impurity phases such as Bi{sub 2}O{sub 3} and γ-Fe{sub 2}O{sub 3}. Proper amounts of CTAB addition (1.5 wt.%) considerably eliminates Bi{sub 2}O{sub 3} and γ-Fe{sub 2}O{sub 3} residuals in the combustion product. FESEM micrographs show particle size reduction and also more uniform particle size distribution when using 0.75 wt.% of CTAB addition. In the presence of the BiFeO{sub 3}, the UV irradiation for 120 min resulted in 26% degradation of MB, in a sample with 0.75 wt.% CTAB. The synthesized nanoparticles of BiFeO{sub 3} in the sample with 0.75 wt.% CTAB after calcination at 650 {sup ∘}C showed a weak ferromagnetism behavior with saturation magnetization of 0.54 emu/g. {sub i}H{sub C} values of the samples are in the range of 200 to 238 Oe, depending on the crystallite size and phase constituents of the samples.

• OSTI ID: 22773721
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 10 Vol. 31; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
BROMIDES
CALCINATION
COMBUSTION PRODUCTS
FERRITES
FERROMAGNETISM
IMPURITIES
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
METHYLENE BLUE
MICROSTRUCTURE
NANOPARTICLES
PARTICLE SIZE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SYNTHESIS
ULTRAVIOLET RADIATION
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION