Highly dispersed and active iron oxide nanoparticles in SBA-15 with different pore sizes for the synthesis of diphenylmethane

Anand, Chokkalingam, Lawrence, Geoffrey, Elzatahry, Ahmed A., Al-Deyab, Salem S., Balasubramanian, Veerappan V., Cha, Wang Soo, Zaidi, Javid S. M. and Vinu, Ajayan (2014) Highly dispersed and active iron oxide nanoparticles in SBA-15 with different pore sizes for the synthesis of diphenylmethane. Science of Advanced Materials, 6 7: 1618-1626. doi:10.1166/sam.2014.1844

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Author Anand, Chokkalingam
Lawrence, Geoffrey
Elzatahry, Ahmed A.
Al-Deyab, Salem S.
Balasubramanian, Veerappan V.
Cha, Wang Soo
Zaidi, Javid S. M.
Vinu, Ajayan
Title Highly dispersed and active iron oxide nanoparticles in SBA-15 with different pore sizes for the synthesis of diphenylmethane
Journal name Science of Advanced Materials   Check publisher's open access policy
ISSN 1947-2935
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1166/sam.2014.1844
Open Access Status
Volume 6
Issue 7
Start page 1618
End page 1626
Total pages 9
Place of publication Valencia, CA United States
Publisher American Scientific Publishers
Collection year 2015
Language eng
Subject 2500 Materials Science
Abstract Highly ordered mesoporous SBA-15 catalysts with different pore diameters decorated with various amounts of highly dispersed iron oxide nanoparticles were prepared by using a simple wet-impregnation technique. The structural order of the samples before and after the encapsulation of iron oxide nanoparticles were analysed by X-ray diffraction (XRD), BET nitrogen adsorption, high resolution scanning electron microscopy (HRSEM) and high resolution transmission electron microscope (HRTEM) whereas the nature and coordination of the iron oxide nanoparticles were obtained by ultraviolet-visible diffused reflection spectroscopy (UV-Vis DRS). Characterization results revealed that the iron oxide functionalized samples possess a well-ordered structure and excellent textural properties and the nanoparticles are highly dispersed inside the mesochannels of the SBA-15 supports. The size of the nanoparticles inside the mesochannels was also controlled by tuning the pore diameter of the supports whereas the amount of the nanoparticles was tuned by adjusting the amount of iron source in the synthesis mixture. Finally, these catalysts were tested for Friedel-Crafts benzylation of benzene and other aromatics with benzyl chloride (BC) as alkylating agent under liquid phase condition. All the samples exhibited excellent catalytic performance with a clean BC conversion and the selectivity to diphenylmethane (DPM). The influence of various reaction parameters such as substrate mole ratio, reaction time, reaction temperature and electron donating substituent moieties on the catalytic performance of iron oxide nanoparticles functionalized SBA-15 samples was also investigated. The catalysts showed 100% conversion of BC even at the reaction temperature as low as 50 °C which confirms a higher activity of these catalysts than that of other metal substituted mesoporous catalysts for the benzylation of benzene.
Keyword Benzylation
Iron oxide
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
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