Microwave and Induction Heating-Assisted Biosynthesis of 12CaO 7Al2O3 Electride from Aloe Vera Leaf Extract

Authors

  • Waramon LANGLAR Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
  • Areeya AEIMBHU Department of Physics, Srinakharinwirot University, Bangkok , Thailand
  • Pichet LIMSUWAN Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
  • Chesta RUTTANAPUN Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand

DOI:

https://doi.org/10.5755/j02.ms.24264

Keywords:

12CaO7Al2O3 electride, Aloe Vera Leaf Extract, biosynthesis, microwave assisted, induction heating process

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.

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Published

2021-01-27