Molecular-Ion-Imprinted Chitosan Hydrogels for the Selective Adsorption of Silver(I) in Aqueous Solution

Song, Xinning; Li, C.; Xu, Rong; Wang, K.

doi:10.1021/ie3010989

Cited by 55 publications

(27 citation statements)

References 15 publications

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“…Table compares the maximum Ag(I) ion adsorption capacities of the LS‐PPY nanocomposite with those of different biomass‐based adsorbents reported in recent years . It can be easily seen that the LS‐PPY nanocomposite displayed a high adsorption capacity for Ag(I)ions.…”

Section: Resultsmentioning

confidence: 97%

Controllable preparation and heavy‐metal‐ion adsorption of lignosulfonate‐polypyrrole composite nanosorbent

Luo

Lü

2014

Polymer Composites

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Lignosulfonate‐polypyrrole (LS‐PPY) composite nanospheres were prepared facilely via an in situ polymerization of pyrrole monomers in the presence of lignosulfonate as a dispersant and ammonium persulfate as an oxidant. The LS‐PPY composite was characterized with Fourier Transform infrared spectroscopy (FTIR), thermogravimetric analysis, wide‐angle X‐ray diffraction (XRD), scanning electron microscopy (SEM), field‐emission SEM, and transmission electron microscopy. Uniform LS‐PPY solid composite nanospheres with an average diameter of 154 nm were obtained. The LS‐PPY composite nanospheres were applied to adsorption of Ag(I) and Pb(II) ions from aqueous solutions. Maximum adsorption capacities of Ag(I) and Pb(II) were up to 759.3 mg g−1 and 207.5 mg g−1, respectively. Furthermore, the silver ions can be reduced to metallic silver nanowires through a redox reaction between the LS‐PPY composite nanospheres and the silver ions. A productive no‐template route to fabrication of LS‐PPY composite nanospheres with controllable size and heavy‐metal‐ion adsorption ability was achieved. POLYM. COMPOS., 36:1546–1556, 2015. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 97%

Controllable preparation and heavy‐metal‐ion adsorption of lignosulfonate‐polypyrrole composite nanosorbent

Luo

Lü

2014

Polymer Composites

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“…It was shown in [31] that chitosan fi ber extract copper(II) to a greater extent than silver(I) under competitive sorption conditions. It is known [32] that chitosan cross-linked with epichlorohydrin also extracts at pH 5.6 copper(II) to the greatest extent, the selectivity coeffi cient K Ag/Cu being 0.54. Thus, modifying chitosan with sulfoethyl groups, performing the sorption in an ammonia-acetate buffer solution, and using a material with the largest degree of cross-linking make it possible to substantially raise the extraction selectivity of silver(I), compared with copper(II).…”

Section: Resultsmentioning

confidence: 99%

Effect of the degree of cross-linking of N-2-sulfoethylchitosan on the sorption selectivity of copper(II) and silver(I)

et al. 2015

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Sorption materials based on N-2-sulfoethylchitosan (SECH) with various degrees of cross-linking by glutaric aldehyde were synthesized. The composition and structure of the materials were characterized by elemental analysis and IR Fourier spectroscopy. The selectivity coeffi cients K Ag/Cu were determined for sorbents with a degree of substitution equal to 0.5. It was shown that the sorption selectivity of silver(I) grows with increasing degree of SECH cross-linking, compared with copper(II) in an ammonia-acetate buffer solution.

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“…The molecular imprinting technique is generally used to enhance the adsorption selectivity. A polymer processed by the molecular imprinting technique, regularly called the molecularly imprinted polymer (MIP), has specific cavities with affinity to template molecules (Song et al 2012). Because of the high affinity and specificity to templates, MIP has been served in many fields such as separation, catalysis, and molecular sensors.…”

Section: Introductionmentioning

confidence: 99%

The effective and selective separation of (−)-epigallocatechin gallate by molecularly imprinted chitosan beads

Jing

Yin

2017

J Food Sci Technol

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The (2)-epigallocatechin gallate (EGCG) imprinted chitosan beads (EICBs) were fabricated for the effective and selective separation of EGCG. The EGCG molecules interacted with the amino groups of chitosan in the imprinting process, resulting in a highly porous structure of EICBs and more adsorption sites. Consequently, EICBs exhibited better adsorption performance than nonimprinted chitosan beads. The maximum adsorption capacity of EGCG onto EICBs reached 135.50 mg/g at 313 K. The imprinting factor of EICBs was 4.22, indicating that EICBs possess good recognition ability and selectivity for EGCG. After five cycles of reuse, only a slight decrease (7.77%) in the adsorption capacity was observed, demonstrating the satisfactory reusability of EICBs. Furthermore, the adsorption of EGCG onto EICBs is deduced to be the monolayer adsorption on an energetically homogeneous surface; the hydrogen bonding between EGCG and EICBs is the main driving force for the adsorption. Our studies suggest that EICBs have a great potential for the effective and selective separation of EGCG.

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Molecular-Ion-Imprinted Chitosan Hydrogels for the Selective Adsorption of Silver(I) in Aqueous Solution

Cited by 55 publications

References 15 publications

Controllable preparation and heavy‐metal‐ion adsorption of lignosulfonate‐polypyrrole composite nanosorbent

Controllable preparation and heavy‐metal‐ion adsorption of lignosulfonate‐polypyrrole composite nanosorbent

Effect of the degree of cross-linking of N-2-sulfoethylchitosan on the sorption selectivity of copper(II) and silver(I)

The effective and selective separation of (−)-epigallocatechin gallate by molecularly imprinted chitosan beads

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