• Significant improvement in the pore properties of SBA-15 brought about by carboxylic acids and hydrothermal treatment

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    • Keywords


      SBA-15; mesoporous; carboxylic acids; adsorption; hydrothermal treatment; morphology.

    • Abstract


      A comparative study of the pore properties of SBA-15 samples prepared under nonhydrothermal and hydrothermal conditions, in the absence and presence of carboxylic acids such as succinic, tartaric and citric acids has been carried out. In the absence of carboxylic acid, flake-like and spheroid particles were generally obtained irrespective of the preparative procedures. On the other hand, stirring of the pre-mix induces a rod-like morphology in presence of carboxylic acids. The samples prepared under non-hydrothermal conditions exhibit a higher degree of silicate condensation compared to those synthesized under hydrothermal conditions. SBA-15 samples prepared under hydrothermal conditions show higher values of the d (100) spacing independent of the presence of carboxylic acids. Presence of carboxylic acids as well as hydrothermal treatment improves the pore properties of SBA-15.

    • Author Affiliations


      Milan Kanti Naskar1 M Eswaramoorthy2

      1. Sol-Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032
      2. Chemistry and Physics of Materials Unit and Department of Science and Technology Unit for Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064
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