Intraframework Metal Ion Adsorption in Ligand-Functionalized Mesoporous Silica

Hossain, Kazi Zakir; Mercier, Louis

doi:10.1002/1521-4095(20020805)14:15<1053::aid-adma1053>3.0.co;2-x

Cited by 121 publications

(111 citation statements)

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“…[1] Effective metal-ion adsorbents have been prepared by the immobilization of N-and S-containing groups onto the surface of various substrates, including silica gel, [2,3] zirconia, [4] carbon, [5,6] polymers [7] and, most recently, mesoporous silica. [8][9][10][11][12] However, the selectivities of these materials are usually unsatisfactory because the interaction between metal ions and these typical functional groups is a common acid-base interaction and a number of different metal ions have the ability to bind with them. In addition to the acid-base interaction, the oxidationreduction (O-R) interaction between absorbents and metal ions has been found for several absorbents, such as poly- (1,8-diaminonaphthalene) microparticles, [13,14] sulfanyl absorbents, [7,15,16] tannin gel, [17] crosslinked lignophenol gel, [18,19] and active carbon.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Nanoporous Hydroquinone/Catechol Formaldehyde Resins and their Highly Selective, Efficient and Regenerate Reactive Adsorption for Gold Ions

Zeng

Guo

Zhang³

et al. 2010

Macro Chemistry & Physics

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We present a new type of nanoporous hydroquinone/catechol formaldehyde resin synthesized by a one‐pot route, with a surface area of up to 1 112 m2 · g−1. The resins show highly efficient reactive adsorption for silver/gold (silver adsorbance up to 2.43 g · g−1) and excellent selectivity for gold (Kd is as high as 1 914 090 mL · g−1). The first‐used resins can be regenerated with NaHSO3, and the gold capacities of the recycled PCFR and PHFR reach 44 and 78% of their first loading capacities, respectively.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Nanoporous Hydroquinone/Catechol Formaldehyde Resins and their Highly Selective, Efficient and Regenerate Reactive Adsorption for Gold Ions

Zeng

Guo

Zhang³

et al. 2010

Macro Chemistry & Physics

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“…The UreaMS exhibited a K d value of 0.7 Lg −1 . Higher K d values (5.3-39 Lg −1 ) for some metal cations (e.g., Cu(II) and Hg(II)) have been reported using other functionalized mesoporous silicas (Dai et al 1999;Hossain and Mercier 2002).…”

Section: Resultsmentioning

confidence: 80%

A Study on Al(III) and Fe(II) Ions Sorption by Cattle Manure Vermicompost

Jordão

Fernandes

Ribeiro

et al. 2009

Water Air Soil Pollut

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Cattle manure vermicompost has been used for the adsorption of Al(III) and Fe(II) from both synthetic solution and kaolin industry wastewater. The optimum conditions for Al(III) and Fe(II) adsorption at pH2 (natural pH of the wastewater) were particle size of ≤250µm, 1 g/10 mL adsorbent dose, contact time of 4 h, and temperature of 25°C. Langmuir and Freundlich adsorption isotherms fitted reasonably well in the experimental data, and their constants were evaluated, with R 2 values from 0.90 to 0.98. In synthetic solution, the maximum adsorption capacity of the vermicompost for Al(III) was 8.35 mg g −1 and for Fe(II) was 16.98 mg g −1 at 25°C when the vermicompost dose was 1 g 10 mL −1 , and the initial adjusted pH was 2. The batch adsorption studies of Al(III) and Fe(II) on vermicompost using kaolin wastewater have shown that the maximum adsorption capacities were 1.10 and 4.30 mg g −1 , respectively, at pH2. The thermodynamic parameter, the Gibbs free energy, was calculated for each system, and the negative values obtained confirm that the adsorption processes were spontaneous.

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“…However, the incorporated bridging organic groups are often passive functional groups, such as methylene, ethane, ethylene, dodecane, and benzene, which limited their properties and applications greatly [22,26] . To expand the applications of PMOs, new bridging organic groups that carry adsorbent [40,41] , optical [42 -44] , electronic [45,46] , chiral [47,48] , and catalytic [49,50] functions need to be introduced into the mesoporous silica walls for the fabrication of novel organic-inorganic hybrid materials.…”

Section: Figurementioning

confidence: 99%

Functional-template directed self-assembly (FTDSA) of mesostructured organic-inorganic hybrid materials

Sun

Zhang

et al. 2009

Sci. China Ser. B-Chem.

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Since the discovery of a surfactant directed self-assembly approach for the fabrication of mesoporous silica in 1992, increasing attention has been focused on the design and synthesis of mesostructured functional materials. Organic functionalization is becoming a major topic in this research field, since highly ordered mesostructured organic-inorganic hybrids offer novel functionalities and enhanced performance over their individual components. We begin with a brief overview of the three fundamental methods (post-synthetic grafting technique, co-condensation method, and preparation of periodic mesoporous organosilicas) for the preparation of organically functionalized mesostructured silica, and focus on one of the most promising approaches, which herein was named as functional-template directed self-assembly (FTDSA) approach, and in the eyes of the authors it has a special position in the preparation of this class of hybrid materials. A comprehensive overview of the state of research in the area of FTDSA and its potential applications will be given. mesoporous materials, self-assembly, organic-inorganic hybrids

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Intraframework Metal Ion Adsorption in Ligand-Functionalized Mesoporous Silica

Cited by 121 publications

References 0 publications

Facile Synthesis of Nanoporous Hydroquinone/Catechol Formaldehyde Resins and their Highly Selective, Efficient and Regenerate Reactive Adsorption for Gold Ions

Facile Synthesis of Nanoporous Hydroquinone/Catechol Formaldehyde Resins and their Highly Selective, Efficient and Regenerate Reactive Adsorption for Gold Ions

A Study on Al(III) and Fe(II) Ions Sorption by Cattle Manure Vermicompost

Functional-template directed self-assembly (FTDSA) of mesostructured organic-inorganic hybrid materials

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