V. A. Kreisberga, T. V. Antropovab, and S. V. Kalininab
aDepartment of Chemistry, Moscow State University, Moscow, 119992 Russia
bGrebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034
Russia
e-mail: kreis@kge.msu.ru
Received June 10, 2013
Abstract—Micro- and mesoporous substructures of porous glass (PG) obtained from two-phase alkali-boro-
silicate glass of various compositions as the result of their through acidic leaching under various conditions
have been studied using equilibrium and kinetic adsorption and desorption methods. It has been determined that
for all the studied PG samples multimodal mesopore size distribution (up to four modes) and micropores (up to
three modes) is intrinsic. The effective diameters of the mesopores vary from 3 to 60 nm. The diameters of
micropores vary within small ranges from 0.5 to 0.7 nm. It has been stated that micropores in PG mainly rep-
resent the ranges of the interglobular contacts of secondary silica with sizes of 1–2 diameters of the adsorbate
molecule. It has been shown that varying the composition of the initial alkali-borosilicate glass by the additions
of doping elements (lead, aluminum, fluorine, and phosphorus) and changing the temperature conditions of liq-
uation, one can modify the parameters of the morphology of the pores and ratio between mesoporous and
microporous substructures of PG in broad ranges.
Keywords: micropores; mesopores; porous glass; impurities of lead, aluminum, fluorine, and phosphorus; equi-
librium and kinetic nitrogen desorption and adsorption isotherms; mass spectrometry method of diffusion diag-
nostics of micropores
DOI: 10.1134/S1087659614050071
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