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Characterisation of acidic properties of the surface of SiO2–SnO2 obtained by sol-gel method in anhydrous conditions

  • Physicochemical Processes at the Interfaces
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Abstract

A series of SiO2–SnO2 samples of the Sn/Si molar fractions of 0.05, 0.1, 0.25, 0.5 and 1.0 were synthesised by the sol-gel method in anhydrous conditions. The SiO2–SnO2 samples were characterised by XRD, low-temperature nitrogen adsorption, SEM, 29Si MAS NMR and TPD, using pyridine and acetonitrile as probes. It has been proved that incorporation of small or even insignificant amount of tin in the structure of SiO2 gel lattice considerably increased the number and power of acidic centres accessible to the probe molecules in the samples synthesised by the sol-gel method in anhydrous conditions. The increase in the number and power of acidic centres can substantially improve the catalytic properties of the SiO2–SnO2 system.

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Authors and Affiliations

  1. Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614, Poznan, Poland

    W. Nowicki, Z. Piskuła & P. Kirszensztejn

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  1. W. Nowicki
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  2. Z. Piskuła
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  3. P. Kirszensztejn
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Correspondence to W. Nowicki.

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Nowicki, W., Piskuła, Z. & Kirszensztejn, P. Characterisation of acidic properties of the surface of SiO2–SnO2 obtained by sol-gel method in anhydrous conditions. Prot Met Phys Chem Surf 52, 786–792 (2016). https://doi.org/10.1134/S2070205116050178

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  • DOI: https://doi.org/10.1134/S2070205116050178

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