Calcining silica gels at different drying stages

摘要

Silica gels derived from an acid-catalyzed tetraethyl orthosilicate (TEOS) system were calcined after different duration of ambient drying, and their mesopore structure and surface fractal dimensions are investigated. The largest mesopore porosity if found in the sample with long period of ambient drying, while the sample calcined without drying exhibits the lowest surface fractal dimensions.