Abstract
AbstractIn this study, the synthesis of Calcium–Magnesium oxide through the ball milling method using eggshell as a CaO source, developing an ecological process synthesis, is presented. After ball milling, an annealing process was carried out in order to increase the crystallinity of the material to enhance its optoelectronic properties by varying the temperature from 450 to 900 °C. The samples were analyzed by X-ray diffraction, Raman and UV–Vis spectroscopy, FE-SEM, photoluminescence, and BET analysis. The ball milling process itself promoted a reduction in particle size, which increased slightly during the annealing process, achieving a more homogeneous size distribution and improving its crystallinity, according to XRD and Raman spectroscopy. The samples were tested for the photodegradation of methylene blue (100 mL of a 10 ppm solution), using LED lamps (200 W). The best photodegradation performance was recorded with the sample annealed at 750 °C, which is explained by the more homogeneous size distribution and the greater surface area, a smaller band gap, and fewer surface defects, which causes greater absorption of light, a better transport of the charge carriers and consequently a better performance in the photodegradation of MB. The complete removal of MB was achieved in 20 min under sunlight stimulation, which can be reducedto 12 min using 400 mg of the catalyst. On the other hand, the trapping experiment showed that superoxide radicals (·O2−) and holes (h+) are the key reactive species in the photodegradation process of MB. The kinetic study showed to follow a pseudo-first-order for all cases. These photodegradation results reported for the first time are better than those reported in other Calcium–Magnesium oxide synthesized by combustion or ultrasound-assisted methods.
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Photodegradation of ceftriaxone using g-C3N4-ZnO nanocomposite as an efficient photocatalyst;Journal of Photochemistry and Photobiology A: Chemistry;2023-11
2. Cuprous Oxide Thin Films Deposited by Chemical Bath Deposition: Effect of Temperature and TEA;2023 20th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE);2023-10-25
3. Cuprous Oxide Thin Films Deposited by Microwave-Assisted Chemical Bath Deposition;2023 20th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE);2023-10-25