Seeharaj, Panpailin

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Seeharaj, Panpailin
Alternative Name
Seeharaj, P.
Main Affiliation
Email
panpailin.se@kmitl.ac.th

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    Item type:Publication,
    Ultrasonically assisted surface modified CeO2 nanospindle catalysts for conversion of CO2 and methanol to DMC
    (2022-11-01)
    Kulthananat, Tachatad
    ;
    Kim-Lohsoontorn, Pattaraporn
    ;
    Seeharaj, Panpailin
    This study developed a facile and effective approach to engineer the surface properties of cerium oxide (CeO<inf>2</inf>) nanospindle catalysts for the direct synthesis of dimethyl carbonate (DMC) from CO<inf>2</inf> and methanol. CeO<inf>2</inf> nanospindles were first prepared by a simple precipitation method followed by wet chemical redox etching with sodium borohydride (NaBH<inf>4</inf>) under high intensity ultrasonication (ultrasonic horn, 20 kHz, 150 W/cm<sup>2</sup>). The ultrasonically assisted surface modification of the CeO<inf>2</inf> nanospindles in NaBH<inf>4</inf> led to particle collisions and surface reduction that resulted in an increase in the number of surface-active sites of exposed Ce<sup>3+</sup> and oxygen vacancies. The surface modified CeO<inf>2</inf> nanospindles showed an improvement of catalytic activity for DMC formation, yielding 17.90 mmol·g<inf>cat</inf><sup>−1</sup> with 100 % DMC selectivity. This study offers a simple and effective method to modify a CeO<inf>2</inf> surface, and it can further be applied for other chemical activities.