The effects of heat treatment temperatures on photocatalytic activity of cobalt ferrite nanoparticles synthesised by microwave-assisted combustion method
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
John Wiley and Sons Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the effects on the photocatalytic activities of particles after heat treatment has been applied to cobalt ferrite nanoparticles produced by microwave-assisted combustion method were observed. The heat treatment applied to the samples was produced with only the microwave effect, at temperatures ranging from 300 to 1000°C. Thermogravimetric analysis was performed on the precursor sample in air atmosphere. During this analysis, the gases released up to 1200°C were identified with a Fourier-transform infrared (FTIR) spectrometer integrated into a thermogravimetric analysis system. Then, the cobalt ferrite nanoparticles produced with heat treatments applied at various temperatures were used as a photocatalyst to remove the dyestuff content in synthetic wastewaters prepared by using Astrazon Red GTL textile dye by photocatalytic oxidation, and their photocatalytic activities were compared. In these experiments, the operational parameters for photocatalysis processes were applied as 400 rpm for stirring speed, 50 mg/L for initial contaminant concentration, 0.5 g/L for catalyst dosage, 25°C for temperature, and 4400 ?W/cm2 for light intensity. As a result of the experiments, it was observed that the crystal structure of the cobalt ferrite nanoparticles produced with the increase of the applied heat treatment temperature improved significantly. The obtained data show a strong relationship between the structural properties of materials and their photocatalytic activities. In addition, it was determined that the dyestuff in the solution was completely degraded in the experiments, and it was determined that all processes were compatible with the pseudo-first-order kinetic model. © 2022 Society of Dyers and Colourists.
Açıklama
Anahtar Kelimeler
Cobalt, Combustion, Crystal structure, Ferrite, Fourier transform infrared spectroscopy, Heat treatment, Nanoparticles, Thermogravimetric analysis, After-heat treatment, Air atmosphere, Cobalt ferrite nanoparticles, Combustion method, Effect of heat treatments, Heat treatment temperature, Microwave-assisted combustions, Microwaves effects, Photocatalytic activities, Synthesised, Photocatalytic activity, Crystal Structure, Experimentation, Gravimetry, Heat Treatment, Processes, Temperature, Thermal Analysis
Kaynak
Coloration Technology
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
139
Sayı
3
