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Incorporation of tin in different types of pores in SBA-15: Synthesis, characterization and catalytic activity by M. Sasidharan; Y. Kiyozumi; N.K. Mal; M. Paul; P.R. Rajamohanan; A. Bhaumik is a Materials Science article available to read on EtoBox.

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Mesoporous Sn-SBA-15 has been synthesized by three different methods such as conventional hydrothermal route, using cocatalyst NH 4 F and in the presence of organosilane precursor. All the materials are thoroughly characterized by powder X-ray diffraction (XRD), SEM, TEM, N 2 sorption and surface area measurements, diffuse-reflectance UV-visible and FTIR spectroscopy, TG-DTA and elemental analysis through ICP. Nitrogen adsorption data, XRD patterns, and TEM observations suggests that the textural properties are retained during the isomorphous substitution of silicon by tin. ICP chemical analysis indicates that tin can be substituted in the range of Si/Sn = 69-162. UV-visible spectra of samples synthesized by the cocatalytic approach exhibit unique absorption band at 213 nm characteristics of tin atom substituted in the smaller pores (2-3 nm) located inside the walls of mesopores. Further, an additional band at 224 nm can be assigned to Sn atoms located in the distorted tetrahedral position along the primary mesopores. In contrary, only one absorption band centered at 224 nm is observed for all the samples synthesized by conventional hydrothermal as well as in the presence of organo

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Author

M. Sasidharan; Y. Kiyozumi; N.K. Mal; M. Paul; P.R. Rajamohanan; A. Bhaumik

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1387-1811)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)