Selective Ce(III) ion-imprinted polymer grafted on Fe3O4 nanoparticles supported by SBA-15 mesopores microreactor via surface-initiated RAFT polymerization

Liu, Yan; Qiu, Jian; Jiang, Yinhua; Liu, Zhanchao; Meng, Minjia; Ni, Liang; Qin, Changchun; Jin, Peng

doi:10.1016/j.micromeso.2016.07.016

Cited by 41 publications

(18 citation statements)

References 36 publications

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“…In addition, the BET surface area and pore size of Fe(II)-IIP (2 m 2 g −1 and 0.01 cm 3 g −1 , respectively) are lower than these of the non-IIP (Table 1). These typical results after imprinting are explained with the incorporation of Fe(II)-BP complex in polymer network which causes a certain filling of the pores and reduced adsorption of N2 [28].…”

Section: Synthesis Of Fe(ii)-iip and Characterization Studiesmentioning

confidence: 94%

“…2., the degree of ferrous ions sorption was enhanced for both sorbents with an increasing pH to 7. At low pH, the pyridine groups in the polymer matrix and chelating agent BP are protonated and positively charged (pKa=5 for polyvinylpyridine [28] and pKa=4.33 for BP) and the adsorption of Fe(II) on the sorbent particles is prevented due to the electrostatic repulsion between them. When the pH increased, the sorbent surface became less positively charged, because of partial deprotonation which increases the ability of the pyridine for complex formation with the Fe(II) in aqueous solution.…”

Section: Optimization Of Chemical Parameters For Sorption and Desorptmentioning

confidence: 99%

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Iron(II) ion imprinted polymer for Fe(II)/Fe(III) speciation in wine

Mitreva

Dakova

Karadjova

2017

Microchemical Journal

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In this paper, we proposed a procedure for the determination of Fe(III) and total Fe(II)+Fe(III) in wine samples employing newly synthesized Fe(II) ion imprinted polymer (Fe(II)-IIP) as a sorbent incorporated in dispersive solid phase extraction. Cross-linked precipitation copolymerization using 4-vinylpyridine (functional monomer), trimethylolpropane trimethacrylate (cross-linking agent) and 2,2′-bipyridyl as a specific for Fe(II) ligand was used for the synthesis of Fe(II)-IIP. The optimization experiments showed quantitative sorption of both Fe(II) and Fe(III) on the surface of Fe(II)-IIP at pH 7, however selective sorption of only Fe(II) could be achieved in the presence of fluoride ions as a masking agent for Fe(III). The Langmuir adsorption isotherm best described the adsorption of Fe(II) on the surface of the sorbent on the at least two kinds of binding sites with higher and lower affinities as defined by Scatchard plot. The analytical procedure developed allows the determination of iron(III) and total Fe(II)+Fe(III) in wine samples, with limits of quantification 0.1 mg L-1. The relative standard deviation varied in the range 3-7% for Fe content 0.1-10 mg L-1 .

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Section: Synthesis Of Fe(ii)-iip and Characterization Studiesmentioning

confidence: 94%

Section: Optimization Of Chemical Parameters For Sorption and Desorptmentioning

confidence: 99%

Iron(II) ion imprinted polymer for Fe(II)/Fe(III) speciation in wine

Mitreva

Dakova

Karadjova

2017

Microchemical Journal

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“…For that purpose, Liu and co-workers [ 85 ] proposed mesoporous SBA-15 material as a support for magnetite nanoparticles. In order to control the thickness of the organic shell, the controlled polymerization was utilized.…”

Section: Molecularly or Ion Imprinted Sorbents For Solid Phase Extraction—synthesis Approaches And Characterizationmentioning

confidence: 99%

Imprinting Technology for Effective Sorbent Fabrication: Current State-of-Art and Future Prospects

2021

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In the last 10 years, we have witnessed an extensive development of instrumental techniques in analytical methods for determination of various molecules and ions at very low concentrations. Nevertheless, the presence of interfering components of complex samples hampered the applicability of new analytical strategies. Thus, additional sample pre-treatment steps were proposed to overcome the problem. Solid sorbents were used for clean-up samples but insufficient selectivity of commercial materials limited their utility. Here, the application of molecularly imprinted polymers (MIPs) or ion-imprinted polymers (IIPs) in the separation processes have recently attracted attention due to their many advantages, such as high selectivity, robustness, and low costs of the fabrication process. Bulk or monoliths, microspheres and core-shell materials, magnetically susceptible and stir-bar imprinted materials are applicable to different modes of solid-phase extraction to determine target analytes and ions in a very complex environment such as blood, urine, soil, or food. The capability to perform a specific separation of enantiomers is a substantial advantage in clinical analysis. The ion-imprinted sorbents gained interest in trace analysis of pollutants in environmental samples. In this review, the current synthetic approaches for the preparation of MIPs and IIPs are comprehensively discussed together with a detailed characterization of respective materials. Furthermore, the use of sorbents in environmental, food, and biomedical analyses will be emphasized to point out current limits and highlight the future prospects for further development in the field.

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“…As a result of its high surface area, durability and high chemical stability, the solid adsorbent materials based on functionalized mesoporous silica were recently employed in the separation of various pollutants and toxic species including organic wastes and heavy metal ions …”

Section: Introductionmentioning

confidence: 99%