13.1. Hendrik - ARTIKEL: Synthesis of Mesoporous

Nurliana Roslan and Hendrik O. Lintang and Salasiah Endud and Mohd Bakri Bakar and Zainab Ramli (2016) 13.1. Hendrik - ARTIKEL: Synthesis of Mesoporous. Malaysian Journal of Catalysis, 1 (1). pp. 27-31. ISSN e-ISSN: 0128-2581

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We report the grafting of ILs onto mesoporous silica SBA-15 nanomaterial with a larger surface area of 737.96 m2/g and an interpore distance of 10.68 nm for selective oxidation of 2,3,6-trimethylphenol (TMP). IL, 1-(3-triethoxysilylpropyl)-3-methylimidazolium chloride was grafted with concentration of 1.0, 2.0, 4.0, 6.0, 8.0 and 10.0 mmol onto SBA-15 via a sol-gel method to obtain IL-SBA-15 nanocomposites. The appearance of vibration bands of C−H (~2900 cm-1), C=C (~1630 cm-1) and C=N bonds (~1570 cm-1) in the FTIR spectra indicates that the ILs were successfully grafted on the surface of SBA-15. The total surface area, total pore volume and BJH pore size distribution of all IL-SBA-15 nanocomposites decreasing with the increasing amount of IL from 393.27 to 354.39 m2/g which indicated that the pore channel and/or surface of SBA-15 were occupied by IL without significant reduction of the quality. It was found that the grafted amount of IL on SBA-15 nanocomposites increased from 0.60 to 0.97 mmol/g when amount of ILs content in the mixture was increased from 1.0 to 10.0 mmol. The IL-SBA-15 nanocomposites were tested as a heterogeneous catalyst for oxidation reaction of 2,3,6-TMP to 2,3,5-trimethylbenzoquinone (TMBQ), employing tert-butyl hydroperoxide (TBHP) as an oxidant at 80 °C for 24 hours. All IL-SBA-15 nanocomposites gave 100% selectivity towards 2,3,5-TMBQ in which IL-SBA-15 with 1.0 mmol of IL gave the highest conversion of TMP (37%).

Item Type: Article
Subjects: Q Science > QD Chemistry
Depositing User: Administrator Ma Chung
Date Deposited: 14 Nov 2017 16:57
Last Modified: 14 Nov 2017 16:57
URI: http://eprints.machung.ac.id//id/eprint/62

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