Porosity of Silica Monoliths with Tailored Mesopores of Ink-Bottle Shape Determined by Nitrogen Adsorption and Positron Annihilation Lifetime Spectroscopy

• Authors: A. Sienkiewicz , A. Kierys , M. Gorgol , R. Zaleski
• Languages of publication: EN

Abstracts

EN

The comparison of pore size distributions obtained with the use of two porosimetric methods: low temperature nitrogen sorption (LN2) and positron annihilation lifetime spectroscopy (PALS), was performed for porous silica monoliths. Four investigated samples were prepared under various synthesis conditions. Nitrogen sorption showed the presence of bottle-shaped pores in all investigated samples. In addition, it seems that the presence of methanol during synthesis influences porosity to a greater extent than organic additives. Quite good agreement between the LN2 and PALS results was observed only for the silica monolith synthesized with β-cyclodextrins as pore directing agent. The biggest discrepancy in the results obtained from these two techniques was observed for the silica gel synthesized with no additives. The origin of such discrepancies, taking into account the shape of pore size distribution and deficiencies of data analysis techniques, is discussed.

Keywords

EN

81.05.Rm; 68.43.-h; 81.70.-q; 78.70.Bj; 36.10.Dr

Discipline

• 81.70.-q: Methods of materials testing and analysis(see also 82.80.-d Chemical analysis and related physical methods of analysis)
• 68.43.-h: Chemisorption/physisorption: adsorbates on surfaces
• 81.05.Rm: Porous materials; granular materials(for granular superconductors, see 74.81.Bd)
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 36.10.Dr: Positronium(see also 82.30.Gg Positronium chemistry)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 5
• Pages: 1568-1571

Dates

published

2017-11

Contributors

author

A. Sienkiewicz

• M. Curie-Skłodowska University, Faculty of Chemistry, Department of Adsorption, pl. M. Curie-Skłodowskiej 3, 20-031 Lublin, Poland

author

A. Kierys

• M. Curie-Skłodowska University, Faculty of Chemistry, Department of Adsorption, pl. M. Curie-Skłodowskiej 3, 20-031 Lublin, Poland

author

M. Gorgol

• M. Curie-Skłodowska University, Institute of Physics, Department of Nuclear Methods, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

R. Zaleski

• M. Curie-Skłodowska University, Institute of Physics, Department of Nuclear Methods, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.132.1568