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• W2091285111 abstract "Mercaptopropyl-functionalized silica spheres have been prepared by self-assembly co-condensation of mercaptopropyltrimethoxysilane (MPTMS) and tetraethoxysilane (TEOS) precursors in the presence of a cationic surfactant as templating agent and ammonia as catalyst. Several materials have been obtained by varying the MPTMS content from 5 to 100% in the synthesis medium, giving rise to a wide range of porous solids featuring different functionalization levels (denoted MPS-n%, with n ranging from 5 to 100) and distinct structural order/disorder over different length scales. They were characterized by N2 sorption isotherms, XRD, scanning and transmission electron microscopy, and particle size analysis. Their reactivity in aqueous media was studied with respect to their binding properties toward HgII species by complexation with thiol groups. Total accessibility (expressed on the basis of a 1:1 S/Hg stoechiometry) was demonstrated and quantified for well-ordered materials containing up to 30% MPTMS. Less open structures characterized by a high degree of functionalization were subject to less-than-complete sorption capacities, while, however, reaching maximum loading values as high as 750 mg g-1. The speed of the uptake process was studied from batch experiments by using a fast electrochemical technique to monitor the consumption of the reactant, as a function of time, as a consequence of HgII sorption by the MPS materials. The associated apparent diffusion coefficients were calculated according to a spherical diffusion model, by appropriate fitting of the kinetic curves. They were strongly affected by both the structure and density of functional groups in the MPS sorbents. Whereas the long hexagonally packed one-dimensional channels of MPS-5% and MPS-10% may induce some diffusional restrictions for HgII to reach the binding sites located deep in the mesopores, transport issues within MPS-15% to MPS-30% sorbents is facilitated by a shorter range structural order in the form of three-dimensional wormhole framework structures. Increasing further the content of organic groups in the materials led to poorly ordered (MPS-40% and MPS-50%) and even amorphous (MPS-70% and MPS-100%) solids, resulting in considerable lowering of mass transfer rates, to which the concomitant increase of hydrophobicity may also contribute to a significant extent. The differences in sorption rates exhibited by MPS materials appear therefore to result from differences in their relative long-range versus short-range structural order/disorder and their intrinsic hydrophobicity, which are induced by their functionalization levels." @default.
• W2091285111 created "2016-06-24" @default.
• W2091285111 creator A5031853825 @default.
• W2091285111 creator A5089514392 @default.
• W2091285111 date "2003-09-27" @default.
• W2091285111 modified "2023-10-10" @default.
• W2091285111 title "Rate of Access to the Binding Sites in Organically Modified Silicates. 3. Effect of Structure and Density of Functional Groups in Mesoporous Solids Obtained by the Co-Condensation Route" @default.
• W2091285111 cites W1022152760 @default.
• W2091285111 cites W135019145 @default.
• W2091285111 cites W1545407628 @default.
• W2091285111 cites W1556548404 @default.
• W2091285111 cites W1586330458 @default.
• W2091285111 cites W1965003669 @default.
• W2091285111 cites W1971488890 @default.
• W2091285111 cites W1974814639 @default.
• W2091285111 cites W1975822498 @default.
• W2091285111 cites W1976746350 @default.
• W2091285111 cites W1978220623 @default.
• W2091285111 cites W1981743346 @default.
• W2091285111 cites W1982784029 @default.
• W2091285111 cites W1985458400 @default.
• W2091285111 cites W1985521480 @default.
• W2091285111 cites W1987388741 @default.
• W2091285111 cites W1989175351 @default.
• W2091285111 cites W1990132909 @default.
• W2091285111 cites W1994494286 @default.
• W2091285111 cites W1994939627 @default.
• W2091285111 cites W1996021090 @default.
• W2091285111 cites W1998316182 @default.
• W2091285111 cites W2001803166 @default.
• W2091285111 cites W2003288533 @default.
• W2091285111 cites W2005242641 @default.
• W2091285111 cites W2007899711 @default.
• W2091285111 cites W2008369948 @default.
• W2091285111 cites W2008423738 @default.
• W2091285111 cites W2009374950 @default.
• W2091285111 cites W2010757748 @default.
• W2091285111 cites W2015604120 @default.
• W2091285111 cites W2016753828 @default.
• W2091285111 cites W2017316265 @default.
• W2091285111 cites W2019107588 @default.
• W2091285111 cites W2019330080 @default.
• W2091285111 cites W2024031096 @default.
• W2091285111 cites W2026474772 @default.
• W2091285111 cites W2028908346 @default.
• W2091285111 cites W2030569678 @default.
• W2091285111 cites W2033745692 @default.
• W2091285111 cites W2035477648 @default.
• W2091285111 cites W2038073844 @default.
• W2091285111 cites W2042602209 @default.
• W2091285111 cites W2045345424 @default.
• W2091285111 cites W2045612416 @default.
• W2091285111 cites W2046818917 @default.
• W2091285111 cites W2047909178 @default.
• W2091285111 cites W2055136313 @default.
• W2091285111 cites W2056330250 @default.
• W2091285111 cites W2059312038 @default.
• W2091285111 cites W2060501662 @default.
• W2091285111 cites W2060609780 @default.
• W2091285111 cites W2064635640 @default.
• W2091285111 cites W2065279982 @default.
• W2091285111 cites W2068444867 @default.
• W2091285111 cites W2069258072 @default.
• W2091285111 cites W2069569935 @default.
• W2091285111 cites W2071910209 @default.
• W2091285111 cites W2072113157 @default.
• W2091285111 cites W2072249032 @default.
• W2091285111 cites W2073346200 @default.
• W2091285111 cites W2074868569 @default.
• W2091285111 cites W2076212381 @default.
• W2091285111 cites W2077031457 @default.
• W2091285111 cites W2077710189 @default.
• W2091285111 cites W2078982026 @default.
• W2091285111 cites W2079800756 @default.
• W2091285111 cites W2081665123 @default.
• W2091285111 cites W2082192250 @default.
• W2091285111 cites W2083908116 @default.
• W2091285111 cites W2084317732 @default.
• W2091285111 cites W2093681230 @default.
• W2091285111 cites W2100577901 @default.
• W2091285111 cites W2104930873 @default.
• W2091285111 cites W2120415490 @default.
• W2091285111 cites W2132581095 @default.
• W2091285111 cites W2134080015 @default.
• W2091285111 cites W2137480479 @default.
• W2091285111 cites W2139699387 @default.
• W2091285111 cites W2950165915 @default.
• W2091285111 cites W2950513684 @default.
• W2091285111 cites W2953203145 @default.
• W2091285111 cites W4212877543 @default.
• W2091285111 cites W4248599704 @default.
• W2091285111 cites W4382128141 @default.
• W2091285111 cites W6465500 @default.
• W2091285111 cites W70134988 @default.
• W2091285111 cites W75934773 @default.
• W2091285111 doi "https://doi.org/10.1021/cm031089l" @default.
• W2091285111 hasPublicationYear "2003" @default.
• W2091285111 type Work @default.

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