Abstract
The SiO2/ZnO nanocomposite with a core-shell structure for photocatalysis from water-soluble zinc salts and sodium silicate was synthesized using the hydrothermal-microwave method. The physicochemical properties of the synthesized SiO2/ZnO were studied and its photocatalytic activity was tested. The band gaps of the heat-treated composite \(E_{{\text{g}}}^{{{\text{dir}}}}\) and \(E_{{\text{g}}}^{{{\text{indir}}}}\) are 3.35 and 3.32 eV, respectively. The photocatalytic activity of the resulting SiO2/ZnO was determined by the decomposition reaction of methylene blue under UV irradiation. The conversion of methylene blue was determined by optical method. The resulting SiO2/ZnO has high photocatalytic activity. The conducted studies showed the effectiveness of microwave synthesis of SiO2/ZnO with a core-shell structure in comparison with traditional methods.
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Funding
The research was carried out with the financial support of the Science Committee of the Ministry of Education, Science, Culture and Sports of the Republic of Armenia within the framework of Scientific Project No. 21T-1D146 “Microwave synthesis of composites with photocatalytic properties”.
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Translated by V. Musakhanyan
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Sargsyan, A.A., Mnatsakanyan, R.A., Grigoryan, T.V. et al. Microwave–Assisted Synthesis of SiO2/ZnO Photocatalyst with Core-Shell Structure. J. Contemp. Phys. 58, 397–404 (2023). https://doi.org/10.1134/S1068337223040163
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DOI: https://doi.org/10.1134/S1068337223040163