Please use this identifier to cite or link to this item:
|Title:||Mesoporous tin silicate: An efficient liquid phase oxidative dehydrogenation catalyst||Authors:||Samanta, S.
Liquid phase catalysis
|Issue Date:||8-Oct-2004||Citation:||Samanta, S., Mal, N.K., Manna, A., Bhaumik, A. (2004-10-08). Mesoporous tin silicate: An efficient liquid phase oxidative dehydrogenation catalyst. Applied Catalysis A: General 273 (1-2) : 157-161. ScholarBank@NUS Repository. https://doi.org/10.1016/j.apcata.2004.06.025||Abstract:||Mesoporous tin silicate materials have been synthesized at room temperature using a self-assembly of cationic surfactant cetyltrimethylammonium bromide (CTAB) and tetraethylorthosilicate (TEOS) and SnCl4 as Si and Sn precursors, respectively, under mild acidic (pH 4.5-6.5) condition. Si/ Sn mol ratios in the product for different mesoporous tin silicate samples were 12.4, 27.2, 48.5 and 74.7 vis-à-vis the ratios 10, 25, 50 and 75, respectively, in the hydrothermal synthesis gels. These mesoporous samples were characterized using powder X-ray diffraction (XRD), N2 sorption, UV-vis diffuse reflectance (UV DRS), FT-IR spectroscopy, and scanning electron microscopy (SEM) on an instrument with an energy dispersive X-ray (EDS) attachment. Characterization data demonstrated that the samples were moderately ordered, with pore dimension of 2.1-2.4nm. UV DRS and IR spectral bands suggested the incorporation of tin in the tetrahedral lattice sites of the mesoporous silica network. After calcination, these tin silicate samples retained their mesophase and showed excellent catalytic activity in one-pot liquid phase selective oxidative dehydrogenation of cyclohexane to 1,4-cyclohexadiene using dilute aqueous hydrogen peroxide as oxidant. A very high selectivity for 1,4-cyclohexadiene (83-98%) was observed using different mesoporous tin-silicate samples and acetonitrile solvent. Very little to almost no further oxidation product of the parent and product olefins, i.e. epoxides or cyclohexanone/cyclohexanol was observed. © 2004 Elsevier B.V. All rights reserved.||Source Title:||Applied Catalysis A: General||URI:||http://scholarbank.nus.edu.sg/handle/10635/132713||ISSN:||0926860X||DOI:||10.1016/j.apcata.2004.06.025|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 21, 2019
WEB OF SCIENCETM
checked on Aug 21, 2019
checked on Aug 16, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.