Synthesis of Fe₃O₄/TiO₂ Nanocomposite as Photocatalyst in Photoreduction Reaction of CO₂ Conversion to Methanol

Abstract:

TiO₂ modified Fe₃O₄ nanocomposite as photocatalyst in CO₂ indirect reduction was synthesized by an ultrasonic-assisted sol-gel method and its photocatalytic activity was studied as well. The modification of the TiO₂ composite was attempted to modify titanium dioxide to have better performance as a photocatalyst. Magnetite synthesis was carried out by the sono-coprecipitation method with the addition of the capping agent. The magnetite was coated with TiO₂ via the sol-gel method under ultrasonic irradiation. The products were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectrophotometry (FT-IR), transmission electron microscopy (TEM), and turbidimetry. The final product was also analyzed by diffuse reflectance UV-Visible (DR-UV) and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX). The product of indirect reduction was analyzed by gas chromatography-mass spectrometry (GC-MS). Photocatalytic reaction with Fe₃O₄/TiO₂ nanocomposite produced a higher concentration of methanol than using TiO₂. Methanol concentration produced from the photocatalytic reaction using TiO₂ and Fe₃O₄/TiO₂ was 6.63% and 16.82%.

• Periodical: Key Engineering Materials (Volume 840)
• Pages: 454-458
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.840.454
• Online since: April 2020
• Authors: Adya Rizky Pradipta, Kurniawan Mauludi, Indriana Kartini, Eko Sri Kunarti*
• Keywords: CO₂, Magnetic, Methanol, Photocatalyst, TiO₂

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