Abstract
The synthesis of transparent monolithic silica with a structure consistent with a space group Pn3m )isdemonstratedusingatemplate-directedsynthesisapproach.TheprocedureisbasedonthehydrolysisandpolymerizationofsiliconalkoxideatlowpHinthepresenceofacationicsurfactant.Thelow-pHreactionrouteischosentoobtaintransparentmonolithicmesoporoussilica.AstructureconsistentwiththePn3m) space group with unit cell lattice parameter ranging from 60–64 Å was identified using small-angle X-ray diffraction. While the lattice parameter is observed to be a monotonically increasing function of surfactant-to-silica ratio, the surfactant-to-alkoxide ratio has a weak discernible effect on the lattice parameter. The Brunauer, Emmett, and Teller (BET) surface area, total pore volume and average pore diameter of the samples are in the range of 787–845 m2/g, 0.37–0.51 cc/g and 18–24 Å respectively. This synthesis approach offers a one-step formation of monolithic mesoporous silica of diverse dimensions for potential use in a variety of technological applications such as catalysis, controlled release and adsorption phenomena .
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36.10.Gr; 68.65.-k; 73.21.-b; 73.23.-b
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Singh , C., Yousuf , M., Qadri , S. et al. Transparent monolithic cubic mesoporous silica synthesized by structure-directing surfactant. Appl Phys A 77, 585–589 (2003). https://doi.org/10.1007/s00339-002-1505-6
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DOI: https://doi.org/10.1007/s00339-002-1505-6