Physiochemical Evaluation of a Ternary Magnetic MIL-101(Fe)–GO–Fe3O4 Utilized for Photocatalytic Conversion of CO2 into Methanol under Ultraviolet Light Irradiation

• Published in: Russian Journal of Physical Chemistry A Vol. 97; no. 7; pp. 1601 - 1614
• Main Authors: Shahi, Mohammad Shahriari Mazrae, Vafajoo, Leila, Kazemeini, Mohammad
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.07.2023; Springer Nature B.V
• Subjects: Carbon dioxide; Catalysts; Chemistry; Chemistry and Materials Science; Conversion; Diffuse reflectance spectroscopy; Electron microscopes; Electron microscopy; Fourier transforms; Graphene; Infrared spectroscopy; Iron oxides; Light irradiation; Magnetochemistry; Mechanochemistry; Metal-organic frameworks; Methanol; Photocatalysis; Photocatalysts; Photochemistry; Physical Chemistry; Physiochemistry; Raman spectroscopy; Spectrum analysis; Ultraviolet radiation; X ray powder diffraction; methanol; MIL-101(Fe)–GO–Fe; magnetic photocatalytic; CO; conversion; O
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024423070178

In this research, photocatalytic conversion of CO 2 to methanol was investigated under ultraviolet (UV-A) light. For this purpose, a number of the metal–organic framework photocatalysts, including MIL-101(Fe), graphene oxide (GO), GO–iron oxide (Fe 3 O 4 ), MIL-101(Fe)–GO–Fe 3 O 4 5, 10, and 20% were synthesized and characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy (RAMAN), scanning electron microscope (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy/map (EDS/map), Brunauer–Emmett–Teller (BET) surface area analysis and Barrett–Joyner–Halenda (BJH), UV–Vis diffuse reflectance spectroscopy (DRS), and value stream mapping (VSM) techniques. The effects of Fe 3 O 4 weight percent on the catalyst properties, and the effect of photocatalyst dosage on the process was investigated. The results show that the catalyst with 10% weight Fe 3 O 4 has the most suitable characteristic for this reason. In optimal conditions, 2212 mg/L of methanol was produced by 0.5 g of MIL‑101–GO–Fe 3 O 4 10% magnetic photocatalyst at 120 min. The reusability of the catalyst was investigated for five cycles. The results showed that it could be used with 4% reduction in performance. Based on the results of the magnetic photocatalyst used, it is environmentally friendly, cost-effective, and highly efficient in mild conditions.