Novel synthesis route of metal doped resorcinol-formaldehyde polymer xerogels with tuned porosity

Nagy, B. and Czakkel, O. and László, Krisztina (2014) Novel synthesis route of metal doped resorcinol-formaldehyde polymer xerogels with tuned porosity. MICROPOROUS and Mesoporous Materials, 185. pp. 66-71. ISSN 1387-1811

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Abstract

The complex preparation route of resorcinol-formaldehyde (RF) organogels offers several opportunities for developing metal-containing mesoporous carbon gels. Incorporation of the metal during the sol-gel stage, however, is not always trivial because it can inhibit the polycondensation reaction. A new route is proposed to circumvent this difficulty in the case of molybdenum. We show that a long enough pre-polymerization period (PP) (minimum 110 min in our case) before adding the metal salt yields a mesoporous polymer monolith. Scanning electron microscopy (SEM), low temperature N2 adsorption and small angle X-ray scattering (SAXS) investigations reveal how changing the PP modifies the structure at various length scales. Adjusting the PP offers a new means of tuning the mesoporosity of the resulting molybdenum-containing RF gels.

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