The green synthesis of magnesium oxide nanoparticles in MFI type zeolite and its application as a photocatalyst
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JWENT-5-3_008
تاریخ نمایه سازی: 25 اردیبهشت 1400
Abstract:
Rice husk silica (RHS), an agriculture waste, was used as a silica source for MFI zeolite synthesis. Magnesium oxide (MgO) nanoparticles (NPs) were grown in zeolite substrates using a solid state reaction. The synthesized nanocomposite (NC) was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS) and transmission electron microscopy (TEM) techniques. The BET results demonstrated specific surface area of MgO/RHS-MFI NC was smaller than RHS-MFI zeolite. It was founded that magnesium oxide NPs can be encapsulated into pores of RHS-MFI zeolite. The most principal objective of this research was evaluation of the capability of photocatalytic process of MgO/RHS-MFI zeolite heterogeneous nanocomposite over methylene blue (MB) dye. The results showed the MB degradation reached ۸۰ % under UV light at pH=۹. RHS-MFI affected the photocatalytic activity of magnesium oxide due to decrease of recombination rate of the electro-hole in magnesium oxide semiconductor. A plausible oxidation mechanism was also proposed.
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Authors
Azita Albouyeh
Department of Chemistry, Faculty of Science, Rasht Branch, Islamic Azad University, Rasht, Iran
Afshin Pourahmad
Department of Chemistry, Faculty of Science, Rasht Branch, Islamic Azad University, Rasht, Iran
Hassan kefayati
Department of Chemistry, Faculty of Science, Rasht Branch, Islamic Azad University, Rasht, Iran
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