Abstract
In this study, nanorod-like cryptomelane was prepared via reduction of potassium permanganate in the presence of Tergitol (S1) and cetyltrimethylammonium bromide (CTAB, S2) as surfactant-templates. X-ray powder diffraction, scanning electron microscopy and N2 adsorption–desorption isotherms indicated the microporous nanorod-like cryptomelane structure. Element analysis revealed 7.5 wt% (S1) and 4.5 wt% (S1) of potassium while thermal gravimetricanalysis and temperature program desorption of oxygen revealed more active oxygen species over S2 catalyst, consisting to a lower H2 consumption over S2 (3.04 mmolH2/g) than that over S1 (3.55 mmolH2/g). Both Tergitol and CTAB surfactant-templates contributed to significant enhancement of their catalytic reactivity in vapor-phase oxidation of benzyl alcohol to benzaldehyde (rPhCHO = 68.6 and 74.6 mmolPhCHO/g.h at 280 °C over S1 and S2 catalysts, respectively). S1 catalyst possesses unique properties such as uniform nano-rod morphology, high thermal stability and considerable rPhCHO at 240–280 °C, adapting the industrial processes to produce chlorine-free benzaldehyde.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
