Preparation and characterization of Mg/TiO2 for visible light photooxidative-extractive deep desulfurization

• Main Authors: Yin, Y.C., Kait, C.F., Fatimah, H., Wilfred, C., Taha, M.F.B., Yunus, N.B.M.
• Format: Article
• Published: Penerbit Universiti Kebangsaan Malaysia 2017
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019210185&doi=10.17576%2fjsm-2017-4603-18&partnerID=40&md5=0a02b09683d9ec56864515e3850963f4; http://eprints.utp.edu.my/19591/
• Institution: Universiti Teknologi Petronas

A series of Mg/TiO2 photocatalysts were prepared using aqueous wet impregnation method at different Mg loading followed by calcination at different temperatures for 1 h duration. The photocatalysts were characterized using thermal gravimetry, Fourier-transform infrared spectroscopy, x-ray diffraction, field emission scanning electron microscopy and high-resolution transmission electron microscopy. The photocatalysts were investigated for photooxidative-extractive deep desulfurization of model oil containing dibenzothiophene at room temperature and under visible light irradiation. The model oil containing 100 ppm S was photooxidized followed by extraction using imidazolium-phosphate ionic liquids at room temperature. The best performing photocatalyst was 0.25 wt. Mg/TiO2 calcined at 400°C (0.25Mg400), in which 98.4 of dibenzothiophene (3.070 mmol DBT per g photocatalyst) was converted to dibenzothiophene sulfone. The highest extraction efficiency of 97.8 (0.01525 mmol S per mL ionic liquid) was displayed by 1,2-diethylimidazolium diethylphosphate. © 2017, Penerbit Universiti Kebangsaan Malaysia. All rights reserved.