Summary
The immersional heats of zinc oxide in water have been measured in connection with the variation of the outgassing temperature of the sample. The heats show a maximum on the sample treated at 400° to 500°C. This phenomenon can be explained in terms of chemisorption which occurs on the dehydrated site on the surface, followed by physical adsorption on the surface hydroxyl groups due to hydrogen bonding.
The heats of adsorption and chemisorption of water molecules on the surface of zinc oxide were calculated separately from the data of the immersional heat and the water content.
Zusammenfassung
Es wurde die Benetzungswärme von Zinkoxid in Wasser in Abhängigkeit von der Vorbehandlungstemperatur bestimmt. Bei den Proben, die zwischen 400° und 500°C entgast wurden, trat ein Maximum in der Benetzungswärme auf, das durch eine besonders starke Chemisorption erklärt wird. An den bei anderen Temperaturen entgasten Präparaten findet nur eine physikalische Adsorption statt. Aus den gemesenen Benetzungswärmen und dem H2O-Gehalt der Oberfläche wurden die Adsorptionswärmen von Wasser an Zinkoxid bei physikalischer und bei chemischer Adsorption berechnet.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Arghiroponlos, B. M. andS. J. Teichner, J. Catalysis3, 477 (1964);Luetic, P. F. andI. Sviben, ibid.4, 109 (1965).
Tanabe, K. andT. Yamaguchi, J. Res. Inst. Catalysis, Hokkaido Univ.11, 179 (1964).
Watanabe, H., M. Wada andT. Takahashi, Japan J. Appl. Phys.3, 617 (1964);Preier, H., Z. Naturforsch.19a, 1431 (1964).
Makrides, A. C. andN. Hackerman, J. Phys. Chem.63, 594 (1959);Egorov, M. M., V. F. Kiselev, K. G. Krasilnikov andV. V. Murina, J. Phys. Chem. (U.S.S.R.)33, 65 (1959);Young, G. J. andT. P. Bursh, J. Colloid Sci.15, 361 (1960);Whalen, J. W., “Solid Surfaces and the Gas-Solid Interface”, Ed. byCopeland, L. E. et al., Amer. Chem. Soc. (Washington, D. C. 1961), p. 281.
Peri, J. B. andR. B. Hannan, J. Phys. Chem.64, 1526 (1960);McDonald, R. S., J. Amer. Chem. Soc.79, 850 (1957);Basila, M. R., J. Chem. Phys.35, 1151 (1961).
Zimmerman, J. R. andJ. A. Lasater, J. Phys. Chem.62, 1157 (1958);O'Reilly, D. E., Advances in Catalysis12, 31 (1960).
Morimoto, T. andM. Sakamoto, Bull. Chem. Soc. Japan37, 1369 (1963).
Parks, G. A., Chem. Rev.65, 177 (1965).
Morimoto, T. andM. Sakamoto, Bull. Chem. Soc. Japan37, 719 (1964).
Morimoto, T., M. Yamaguchi, T. Matsumoto andK. Juna, Rep. Res. Lab. Surface Science, Okayama Univ.2, 65 (1962).
Morimoto, T., K. Shiomi andH. Tanaka, Bull. Chem. Soc. Japan37, 392 (1964).
To be published.
Young, G. J. andT. P. Bursh, J. Colloid Sci.15, 361 (1960).
Dana, S. andW. E. Ford, “A Textbook of Mineralogy” (New York 1960), p. 480.
Author information
Authors and Affiliations
Additional information
With 4 figures and 1 table
Rights and permissions
About this article
Cite this article
Morimoto, T., Nagao, M. & Hirata, M. The heat of immersion of zinc oxide in water. Kolloid-Z.u.Z.Polymere 225, 29–33 (1968). https://doi.org/10.1007/BF02111395
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02111395