Publication: Microwave and induction heating-assisted biosynthesis of 12CaO.7Al2O3 electride from aloe vera leaf extract
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Issued Date
2021
Resource Type
File Type
application/pdf
ISSN
13921320
Other identifier(s)
2-s2.0-85099640838
Rights
Srinakharinwirot University
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Medziagotyra. Vol 27, No.1 (2021), p.84-89
Suggested Citation
Langlar W., Aeimbhu A., Limsuwan P., Ruttanapun C. Microwave and induction heating-assisted biosynthesis of 12CaO.7Al2O3 electride from aloe vera leaf extract. Medziagotyra. Vol 27, No.1 (2021), p.84-89. doi:10.5755/j02.ms.24264 Retrieved from: https://hdl.handle.net/20.500.14740/4951
Author(s)
Abstract
The white powders used as precursor powders for the synthesis of 12CaO.7Al2O3 electride (C12A7:e-) were prepared by biosynthesis method using Aloe vera extract and microwave assisted synthesis. The C12A7:e- crystals were synthesized by induction heating process under a reducing atmosphere at different times of 3, 4 and 5 min. The structure of C12A7:e- powders was characterized by X-ray diffraction. The XRD analysis revealed that pure C12A7:e- powders were obtained from white precursor powders with an induction heating process time of 5 min. To confirm that the white precursor powders were transformed into C12A7:e- after induction heating process for 3, 4 and 5 min, the optical absorption spectra of powders were investigated by an UV-Vis diffuse reflectance spectrometer in the wavelength range of 200 - 800 nm. The results show the optical absorption bands at 2.8 eV for the white precursor powders with induction heating time of 3, 4 and 5 min. This is due to the C12A7 was transformed into electride (C12A7:e-). Therefore, the results on the optical absorption spectra are in good agreement with the XRD results. © Langlar et al.