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Synthesis and Characterization of Functionalized Silica-Based Nanohybrid Materials for Oxyanions Adsorption

Identifieur interne : 003950 ( PascalFrancis/Curation ); précédent : 003949; suivant : 003951

Synthesis and Characterization of Functionalized Silica-Based Nanohybrid Materials for Oxyanions Adsorption

Auteurs : Inna Karatchevtseva [Australie] ; Marion Astoux [France] ; David J. Cassidy [Australie] ; Patrick Yee [Australie] ; John R. Bartlett [Australie] ; Christopher S. Griffith [Australie]

Source :

RBID : Pascal:10-0274539

Descripteurs français

English descriptors

Abstract

This study investigates the structural evolution of a series of nanohybrid powders and coatings synthesized by direct co-condensation of amino-functionalized alkyltrialkoxysilanes and tetraalkoxysilanes with an aromatic carboxylic acid (trimesic acid, TMA) as a structure directing agent. Fourier transform infrared spectroscopy (FTIR) and 13C CP-MAS NMR results have suggested the formation of secondary (-CO-NH-) amide linkages upon interaction of TMA with the amino functionalized silane thus creating a "scaffold" around which the silica network is formed and also assisting in more homogeneous distribution of nitrogen sites within the nanohybrid structure. Functionalized silica powders were investigated for their potential to remove toxic oxyanions from mildly acidic or basic solutions. The uptake of Mo(VI), Se(VI), and Cr(VI) oxyanions was investigated as a function of the nanohybrid composition, oxyanion concentration, and solution pH using laser diffraction particle sizing, gas adsorption, and various spectroscopic techniques. The adsorption data obtained for Mo and Se could be adequately described by Langmuir adsorption isotherms, while the Freundlich isotherm is employed to fit the adsorption data for Cr. An easily accessible processing window (of pH, aging time, etc.) has been identified allowing production of continuous and uniform thin nanohybrid coatings on silicon and glass substrates. These coatings were tested as chemical barriers against Mo leaching from specially prepared Mo-doped glass. Leaching studies were conducted over 200 days in water at 90 °C and the Mo leaching from coated and uncoated samples compared.
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A11 02  1    @1 ASTOUX (Marion)
A11 03  1    @1 CASSIDY (David J.)
A11 04  1    @1 YEE (Patrick)
A11 05  1    @1 BARTLETT (John R.)
A11 06  1    @1 GRIFFITH (Christopher S.)
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A14 02      @1 Minerals, ANSTO, PMB I @2 Menai, NSW 2234 @3 AUS @Z 4 aut. @Z 6 aut.
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C01 01    ENG  @0 This study investigates the structural evolution of a series of nanohybrid powders and coatings synthesized by direct co-condensation of amino-functionalized alkyltrialkoxysilanes and tetraalkoxysilanes with an aromatic carboxylic acid (trimesic acid, TMA) as a structure directing agent. Fourier transform infrared spectroscopy (FTIR) and 13C CP-MAS NMR results have suggested the formation of secondary (-CO-NH-) amide linkages upon interaction of TMA with the amino functionalized silane thus creating a "scaffold" around which the silica network is formed and also assisting in more homogeneous distribution of nitrogen sites within the nanohybrid structure. Functionalized silica powders were investigated for their potential to remove toxic oxyanions from mildly acidic or basic solutions. The uptake of Mo(VI), Se(VI), and Cr(VI) oxyanions was investigated as a function of the nanohybrid composition, oxyanion concentration, and solution pH using laser diffraction particle sizing, gas adsorption, and various spectroscopic techniques. The adsorption data obtained for Mo and Se could be adequately described by Langmuir adsorption isotherms, while the Freundlich isotherm is employed to fit the adsorption data for Cr. An easily accessible processing window (of pH, aging time, etc.) has been identified allowing production of continuous and uniform thin nanohybrid coatings on silicon and glass substrates. These coatings were tested as chemical barriers against Mo leaching from specially prepared Mo-doped glass. Leaching studies were conducted over 200 days in water at 90 °C and the Mo leaching from coated and uncoated samples compared.
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Pascal:10-0274539

Le document en format XML

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<div type="abstract" xml:lang="en">This study investigates the structural evolution of a series of nanohybrid powders and coatings synthesized by direct co-condensation of amino-functionalized alkyltrialkoxysilanes and tetraalkoxysilanes with an aromatic carboxylic acid (trimesic acid, TMA) as a structure directing agent. Fourier transform infrared spectroscopy (FTIR) and
<sup>13</sup>
C CP-MAS NMR results have suggested the formation of secondary (-CO-NH-) amide linkages upon interaction of TMA with the amino functionalized silane thus creating a "scaffold" around which the silica network is formed and also assisting in more homogeneous distribution of nitrogen sites within the nanohybrid structure. Functionalized silica powders were investigated for their potential to remove toxic oxyanions from mildly acidic or basic solutions. The uptake of Mo(VI), Se(VI), and Cr(VI) oxyanions was investigated as a function of the nanohybrid composition, oxyanion concentration, and solution pH using laser diffraction particle sizing, gas adsorption, and various spectroscopic techniques. The adsorption data obtained for Mo and Se could be adequately described by Langmuir adsorption isotherms, while the Freundlich isotherm is employed to fit the adsorption data for Cr. An easily accessible processing window (of pH, aging time, etc.) has been identified allowing production of continuous and uniform thin nanohybrid coatings on silicon and glass substrates. These coatings were tested as chemical barriers against Mo leaching from specially prepared Mo-doped glass. Leaching studies were conducted over 200 days in water at 90 °C and the Mo leaching from coated and uncoated samples compared.</div>
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<sZ>3 aut.</sZ>
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<fA14 i1="02">
<s1>Minerals, ANSTO, PMB I</s1>
<s2>Menai, NSW 2234</s2>
<s3>AUS</s3>
<sZ>4 aut.</sZ>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="03">
<s1>Ecole Nationale Supérieure de Chimie de Paris, 11, Rue Pierre et Marie Curie</s1>
<s2>75005 Paris</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="04">
<s1>School of Natural Sciences, University, of Western Sydney, Penrith South DC</s1>
<s2>NSW 1797</s2>
<s3>AUS</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA20>
<s1>8327-8335</s1>
</fA20>
<fA21>
<s1>2010</s1>
</fA21>
<fA23 i1="01">
<s0>ENG</s0>
</fA23>
<fA43 i1="01">
<s1>INIST</s1>
<s2>20642</s2>
<s5>354000182189910920</s5>
</fA43>
<fA44>
<s0>0000</s0>
<s1>© 2010 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA47 i1="01" i2="1">
<s0>10-0274539</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Langmuir</s0>
</fA64>
<fA66 i1="01">
<s0>USA</s0>
</fA66>
<fA99>
<s0>ref. et notes dissem.</s0>
</fA99>
<fC01 i1="01" l="ENG">
<s0>This study investigates the structural evolution of a series of nanohybrid powders and coatings synthesized by direct co-condensation of amino-functionalized alkyltrialkoxysilanes and tetraalkoxysilanes with an aromatic carboxylic acid (trimesic acid, TMA) as a structure directing agent. Fourier transform infrared spectroscopy (FTIR) and
<sup>13</sup>
C CP-MAS NMR results have suggested the formation of secondary (-CO-NH-) amide linkages upon interaction of TMA with the amino functionalized silane thus creating a "scaffold" around which the silica network is formed and also assisting in more homogeneous distribution of nitrogen sites within the nanohybrid structure. Functionalized silica powders were investigated for their potential to remove toxic oxyanions from mildly acidic or basic solutions. The uptake of Mo(VI), Se(VI), and Cr(VI) oxyanions was investigated as a function of the nanohybrid composition, oxyanion concentration, and solution pH using laser diffraction particle sizing, gas adsorption, and various spectroscopic techniques. The adsorption data obtained for Mo and Se could be adequately described by Langmuir adsorption isotherms, while the Freundlich isotherm is employed to fit the adsorption data for Cr. An easily accessible processing window (of pH, aging time, etc.) has been identified allowing production of continuous and uniform thin nanohybrid coatings on silicon and glass substrates. These coatings were tested as chemical barriers against Mo leaching from specially prepared Mo-doped glass. Leaching studies were conducted over 200 days in water at 90 °C and the Mo leaching from coated and uncoated samples compared.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>001C01I</s0>
</fC02>
<fC02 i1="02" i2="X">
<s0>001C01J</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Synthèse</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Synthesis</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Síntesis</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Caractérisation</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Characterization</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Caracterización</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Silice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Silica</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Sílice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Adsorption</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>Adsorption</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Adsorción</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Poudre</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Powder</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Polvo</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Condensation</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Condensation</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Condensación</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Acide carboxylique</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Carboxylic acid</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Acido carboxílico</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE">
<s0>Spectrométrie IR</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG">
<s0>Infrared spectrometry</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA">
<s0>Espectrometría IR</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Spectrométrie RMN</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG">
<s0>NMR spectrometry</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Espectrometría RMN</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE">
<s0>Silane</s0>
<s2>NK</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG">
<s0>Silane</s0>
<s2>NK</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA">
<s0>Silano</s0>
<s2>NK</s2>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE">
<s0>Distribution</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG">
<s0>Distribution</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA">
<s0>Distribución</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Azote</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Nitrogen</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Nitrógeno</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE">
<s0>Structure</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG">
<s0>Structure</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA">
<s0>Estructura</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE">
<s0>Potentiel</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG">
<s0>Potential</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA">
<s0>Potencial</s0>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE">
<s0>Solution acide</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG">
<s0>Acidic solution</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA">
<s0>Solución ácida</s0>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE">
<s0>Solution basique</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG">
<s0>Basic solution</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA">
<s0>Solución básica</s0>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="X" l="FRE">
<s0>Composition</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="X" l="ENG">
<s0>Composition</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="X" l="SPA">
<s0>Composicion</s0>
<s5>17</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE">
<s0>pH</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="X" l="ENG">
<s0>pH</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="X" l="SPA">
<s0>pH</s0>
<s5>18</s5>
</fC03>
<fC03 i1="19" i2="X" l="FRE">
<s0>Laser</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="X" l="ENG">
<s0>Laser</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="X" l="SPA">
<s0>Láser</s0>
<s5>19</s5>
</fC03>
<fC03 i1="20" i2="X" l="FRE">
<s0>Diffraction</s0>
<s5>20</s5>
</fC03>
<fC03 i1="20" i2="X" l="ENG">
<s0>Diffraction</s0>
<s5>20</s5>
</fC03>
<fC03 i1="20" i2="X" l="SPA">
<s0>Difracción</s0>
<s5>20</s5>
</fC03>
<fC03 i1="21" i2="X" l="FRE">
<s0>Particule</s0>
<s2>FX</s2>
<s5>21</s5>
</fC03>
<fC03 i1="21" i2="X" l="ENG">
<s0>Particle</s0>
<s2>FX</s2>
<s5>21</s5>
</fC03>
<fC03 i1="21" i2="X" l="SPA">
<s0>Partícula</s0>
<s2>FX</s2>
<s5>21</s5>
</fC03>
<fC03 i1="22" i2="X" l="FRE">
<s0>Classification granulométrique</s0>
<s5>22</s5>
</fC03>
<fC03 i1="22" i2="X" l="ENG">
<s0>Sizing</s0>
<s5>22</s5>
</fC03>
<fC03 i1="22" i2="X" l="SPA">
<s0>Clasificación granulométrica</s0>
<s5>22</s5>
</fC03>
<fC03 i1="23" i2="X" l="FRE">
<s0>Isotherme Langmuir</s0>
<s5>23</s5>
</fC03>
<fC03 i1="23" i2="X" l="ENG">
<s0>Langmuir isotherm</s0>
<s5>23</s5>
</fC03>
<fC03 i1="23" i2="X" l="SPA">
<s0>Isoterma Langmuir</s0>
<s5>23</s5>
</fC03>
<fC03 i1="24" i2="X" l="FRE">
<s0>Isotherme adsorption</s0>
<s5>24</s5>
</fC03>
<fC03 i1="24" i2="X" l="ENG">
<s0>Adsorption isotherm</s0>
<s5>24</s5>
</fC03>
<fC03 i1="24" i2="X" l="SPA">
<s0>Isotermo adsorción</s0>
<s5>24</s5>
</fC03>
<fC03 i1="25" i2="X" l="FRE">
<s0>Isotherme Freundlich</s0>
<s5>25</s5>
</fC03>
<fC03 i1="25" i2="X" l="ENG">
<s0>Freundlich isotherm</s0>
<s5>25</s5>
</fC03>
<fC03 i1="25" i2="X" l="SPA">
<s0>Isoterma Freundlich</s0>
<s5>25</s5>
</fC03>
<fC03 i1="26" i2="X" l="FRE">
<s0>Revêtement mince</s0>
<s5>26</s5>
</fC03>
<fC03 i1="26" i2="X" l="ENG">
<s0>Thin coatings</s0>
<s5>26</s5>
</fC03>
<fC03 i1="26" i2="X" l="SPA">
<s0>Revestimiento delgado</s0>
<s5>26</s5>
</fC03>
<fC03 i1="27" i2="X" l="FRE">
<s0>Silicium</s0>
<s2>NC</s2>
<s5>27</s5>
</fC03>
<fC03 i1="27" i2="X" l="ENG">
<s0>Silicon</s0>
<s2>NC</s2>
<s5>27</s5>
</fC03>
<fC03 i1="27" i2="X" l="SPA">
<s0>Silicio</s0>
<s2>NC</s2>
<s5>27</s5>
</fC03>
<fC03 i1="28" i2="X" l="FRE">
<s0>Verre</s0>
<s5>28</s5>
</fC03>
<fC03 i1="28" i2="X" l="ENG">
<s0>Glass</s0>
<s5>28</s5>
</fC03>
<fC03 i1="28" i2="X" l="SPA">
<s0>Vidrio</s0>
<s5>28</s5>
</fC03>
<fC03 i1="29" i2="X" l="FRE">
<s0>Substrat</s0>
<s5>29</s5>
</fC03>
<fC03 i1="29" i2="X" l="ENG">
<s0>Substrate</s0>
<s5>29</s5>
</fC03>
<fC03 i1="29" i2="X" l="SPA">
<s0>Substrato</s0>
<s5>29</s5>
</fC03>
<fC03 i1="30" i2="X" l="FRE">
<s0>Eau</s0>
<s5>30</s5>
</fC03>
<fC03 i1="30" i2="X" l="ENG">
<s0>Water</s0>
<s5>30</s5>
</fC03>
<fC03 i1="30" i2="X" l="SPA">
<s0>Agua</s0>
<s5>30</s5>
</fC03>
<fC03 i1="31" i2="X" l="FRE">
<s0>SiO2</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC03 i1="32" i2="X" l="FRE">
<s0>Agent structurant</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="32" i2="X" l="ENG">
<s0>Template</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fN21>
<s1>181</s1>
</fN21>
<fN44 i1="01">
<s1>OTO</s1>
</fN44>
<fN82>
<s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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