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Adsorption of argon on mesoporous anodic alumina

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Abstract

We have studied the adsorption of Ar on regular, highly-ordered alumina membranes made by anodization. The straight, non-interconnected pores have nominal diameters of 31 and 83 nm, with a relative dispersion better than 5 % in the pore size. Adsorption isotherms taken on bare membranes with pores of 83 nm present two distinct hysteresis loops. This is found to be a consequence of the fabrication procedure that yields a central circular region formed by open pores surrounded by an outer ring with closed bottom pores of smaller size, about 40 nm. For the membrane with pores of 31 nm, the difference between these pores is much smaller, about 2 nm, and this explains why the isotherms on these membranes show a single hysteresis loop as expected. Detailed real space analysis of the membranes by electron microscopy confirms the adsorption conclusions.

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Acknowledgments

This work is supported by KRISS project “Anodization Research Laboratory (KRISS-2013-13011082)”.

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Authors and Affiliations

  1. CNISM Unità di Padova, via Marzolo 8, 35131, Padua, Italy

    Lorenzo Bruschi

  2. CNISM and Dipartimento di Fisica e Astronomia G.Galilei, Università di Padova, via Marzolo 8, 35131, Padua, Italy

    Giampaolo Mistura

  3. Korea Research Institute of Standards and Science (KRISS), Yuseong, Daejeon, 305–340, Korea

    Sang-Joon Park & Woo Lee

  4. Korea University of Science and Technology (KUST), Yuseong, Daejeon, 305–333, Korea

    Woo Lee

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  1. Lorenzo Bruschi
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  2. Giampaolo Mistura
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  3. Sang-Joon Park
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  4. Woo Lee
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Correspondence to Giampaolo Mistura or Woo Lee.

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Bruschi, L., Mistura, G., Park, SJ. et al. Adsorption of argon on mesoporous anodic alumina. Adsorption 20, 889–897 (2014). https://doi.org/10.1007/s10450-014-9632-x

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  • DOI: https://doi.org/10.1007/s10450-014-9632-x

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