The influence of dealumination/desilication on structural properties of metakaolin-based geopolymers
Source abstract
Abstract
Abstract The work presents the results of research on the structure modification of metakaolin-based geopolymers with different Si/Al molar ratios in order to obtain hierarchically mesoporous materials. Post-synthesis treatment techniques were applied, involving desilication (with NaOH solution), dealumination (with Na2H2EDTA solution) and the combination of both methods. The structural, microstructural and textural properties were characterized by XRD, XRF, FT-IR, Raman spectroscopy, SEM and BET. At lower Si/Al ratio amorphous geopolymer with zeolite A was obtained. Subsequent dealumination/desilication caused the significant increase in mesopores volume.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Zeolite Catalysis and Synthesis · Advanced ceramic materials synthesis
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