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Preparation of continuous silica gel in the presence of dissolved Cr(NO3)3 leads to a hard high surface area (710 m2/g) microporous xerogel. Formation of the gel in the pore structure of mesoporous Pore-Expanded MCM-41 (PE-MCM-41) and macroporous commercial Cab–O–Sil silica results in retention of the mesoporous structure in the case of PE-MCM-41, and the formation of a powder with a broad pore size...
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