Physical adsorption of argon on boron nitride. A two‐surface analysis of high‐temperature adsorption data

A study has been made of the low‐coverage physical adsorption of argon on hexagonal boron nitride using a precision volumetric apparatus. Isotherms are reported at six temperatures in the range 198–273°K at surface coverages of less than about 3% of the BET monolayer volume. Electron micrographs indicate that two crystalline surfaces are exposed, corresponding to the basal plane and crystal edges. The isotherm data exhibit characteristics of adsorption on a slightly heterogeneous surface and are best‐fitted to an adsorption model in which a two‐energy surface is assumed. Adsorption is assumed to obey Henry's law on one surface and a submonolayer model isotherm on the other. Various models are used and compared and the data analyzed to yield values for the gas‐solid interaction energy and surface area for the two surfaces. Estimates are also given for the interaction energy of neon, krypton, and xenon with boron nitride. Comparisons are made between theoretical and experimental values for the interaction e...

[1]  R. Pierotti,et al.  Modifications to a precision adsorption apparatus. Interaction of the inert gases with boron nitride , 1972 .

[2]  Yun-Yang. Huang.  The temperature dependence of isosteric heat of adsorption on the heterogeneous surface , 1972 .

[3]  Egon Matijević,et al.  Surface and Colloid Science , 1971 .

[4]  P. Elkington,et al.  Heats of adsorption on boron nitride , 1967 .

[5]  E. F. Meyer,et al.  Anisotropy in physical adsorption on graphite , 1967 .

[6]  A. D. Crowell,et al.  Interaction Potentials of Simple Nonpolar Molecules with Boron Nitride , 1965 .

[7]  R. Pierotti.  MULTILAYERS OF ARGON AND NITROGEN ON HEXAGONAL BORON NITRIDE1 , 1962 .

[8]  G. Halsey,et al.  Third‐ and Fourth‐Order Interactions of Argon with a Graphitized Carbon Black , 1962 .

[9]  A. D. Crowell,et al.  Interaction Potentials of Simple Nonpolar Molecules with Graphite , 1961 .

[10]  G. Halsey,et al.  SECOND VIRIAL COEFFICIENTS OF NEON, ARGON, KRYPTON AND XENON WITH A GRAPHITIZED CARBON BLACK1 , 1960 .

[11]  R. Pierotti,et al.  THE INTERACTION OF ARGON WITH HEXAGONAL BORON NITRIDE , 1960 .

[12]  D. Graham.  Geometric Heterogeneity in the Adsorption of Nitrogen on Graphitized Carbon Surfaces , 1957 .

[13]  A. D. Crowell.  Interaction of Rare Gases with Graphite , 1957 .

[14]  W. Steele,et al.  The Interaction of Rare Gas Atoms with Surfaces , 1954 .

[15]  D. P. Poshkus.  Interaction energy of non-polar molecules with graphite surface and in the gas phase , 1965 .

[16]  J. R. Sams.  Dispersion energy calculations in physical adsorption , 1964 .

[17]  S. Ross,et al.  On Physical Adsorption , 1964 .