IR characterization of surface hydroxy groups on haematite

Description

The OH stretching absorptions (3670, 3640 and 3460 cm-1) detected on haematite samples obtained by thermal decomposition of goethite, are assigned to monocoordinated and bridged free surface OH's and to hydrogen bonded OH's in surface micropores, respectively, on the basis of their behavior to successive adsorption of methanol, pyridine and D2O and surface structural models. © 1980 Akadémiai Kiadó.

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