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      A Review: Fundamental Aspects of Silicate Mesoporous Materials

      review-article
      Materials
      MDPI
      mesoporous materials, sol-gel, surfactants, catalyst

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          Abstract

          Silicate mesoporous materials have received widespread interest because of their potential applications as supports for catalysis, separation, selective adsorption, novel functional materials, and use as hosts to confine guest molecules, due to their extremely high surface areas combined with large and uniform pore sizes. Over time a constant demand has developed for larger pores with well-defined pore structures. Silicate materials, with well-defined pore sizes of about 2.0–10.0 nm, surpass the pore-size constraint (<2.0 nm) of microporous zeolites. They also possess extremely high surface areas (>700 m 2 g −1) and narrow pore size distributions. Instead of using small organic molecules as templating compounds, as in the case of zeolites, long chain surfactant molecules were employed as the structure-directing agent during the synthesis of these highly ordered materials. The structure, composition, and pore size of these materials can be tailored during synthesis by variation of the reactant stoichiometry, the nature of the surfactant molecule, the auxiliary chemicals, the reaction conditions, or by post-synthesis functionalization techniques. This review focuses mainly on a concise overview of silicate mesoporous materials together with their applications. Perusal of the review will enable researchers to obtain succinct information about microporous and mesoporous materials.

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          Most cited references105

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          Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism

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            A new family of mesoporous molecular sieves prepared with liquid crystal templates

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              Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                17 December 2012
                December 2012
                : 5
                : 12
                : 2874-2902
                Affiliations
                Chemistry Department, P.O. Box 2455, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; E-Mail: zaothman@ 123456ksu.edu.sa ; Tel.: +966-1-467-5999; Fax: +966-1-467-5992
                Article
                materials-05-02874
                10.3390/ma5122874
                5449058
                ceacff0f-e6bc-4682-a5e6-ef95e36593b1
                © 2012 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                : 15 October 2012
                : 23 November 2012
                : 29 November 2012
                Categories
                Review

                mesoporous materials,sol-gel,surfactants,catalyst
                mesoporous materials, sol-gel, surfactants, catalyst

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