Synthesis of Molecularly Imprinted Polymer on Magnetic Core-Shell Silica Nanoparticles for Recognition of Congo Red

Harsini, Nooshin Nikzad; Ansari, Mehdi; Kazemipour, Maryam

doi:10.29333/ejac/85023

Cited by 14 publications

(11 citation statements)

References 30 publications

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“…Band at 2971 cm −1 is due to the stretching of the C−H bond of sp 3 carbon [37]. Thus, we can conclude from the presence of the functional monomer and cross linker that the synthesis of MMIPs occurred effectively on the support Fe 3 O 4 @SiO 2 [39,40].…”

Section: Resultsmentioning

confidence: 99%

Sensitive Determination of 17β‐Estradiol using a Magneto Sensor Based on Magnetic Molecularly Imprinted Polymer

et al. 2020

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The analysis of 17β‐estradiol with high sensitivity and selectivity is extremely relevant to control the impacts that this compound can cause on health and the environment. Thus, we describe the development and application of a magneto carbon paste electrode based on magnetic molecularly imprinted polymer (MCPE‐MMIP) for determination of 17β‐estradiol. The analyte adsorbed on the MMIP was immobilized on the electrode surface by magnetic capture. The morphological and structural characterization of the obtained MMIP suggests that the material was effectively synthesized. MCPE‐MMIP showed an improvement in the sensitivity for 17β‐estradiol detection when compared to electrode configurations in the absence of this material. The optimum conditions (0.10 mol L−1 phosphate buffer pH 7.0) were reached by differential pulse adsorptive stripping voltammetry (DPAdSV), in which the method presented linearity ranged from 0.06 to 175 μmol L−1 with limits of detection and quantification of 0.02 and 0.06 μmol L−1, respectively. The proposed sensor was applied effectively in the analysis of 17β‐estradiol in river water and raw milk samples, exhibiting excellent recovery values (between 96.20 and 104 %), which were confirmed by HPLC analysis.

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Section: Resultsmentioning

confidence: 99%

Sensitive Determination of 17β‐Estradiol using a Magneto Sensor Based on Magnetic Molecularly Imprinted Polymer

et al. 2020

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“…It sounds the specific recognition properties of molecular imprinted polymer and non-imprinted polymer with respect to a specific template. The imprinting factor (IF) of molecularly imprinted polymer is defined by the following equation [23]:…”

Section: Imprinting Factormentioning

confidence: 99%

Synthesis of molecularly imprinted polymer for removal of Congo red

et al. 2020

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Congo red (CR) is an anionic azo dye widely used in many industries including pharmaceutical, textile, food and paint industries. The disposal of huge amount of CR into the various streams of water has posed a great threat to both human and aquatic life. Therefore, it has become an important aspect of industries to remove CR from different water sources. Molecular imprinting technology is a very slective method to remove various target pollutant from environment. In this study a precipitation polymerization was employed for the effective and selective removal of CR from contaminated aqueous media. A series of congo red molecularly imprinted polymers (CR-MIPs) of uniform size and shape was developed by changing the mole ratio of the components. The optimum ratio (0.1:4: 20, template, functional monomer and cross-linking monomer respectively) for CR1-MIP from synthesized polymers was able to rebind about 99.63% of CR at the optimum conditions of adsorption parameters (contact time 210 min, polymer dosage 0.5 g, concentration 20 ppm and pH 7). The synthesized polymers were characterized by various techniques such as Fourier Infra-red spectroscopy (FTIR), scanning electron microscopy (SEM), Thermogravimetric analysis (TGA), energydispersive X-ray spectroscopy (EDX), and Brumauer-Emmett-Teller (BET). The polymer particles have successfully removed CR from different aqueous media with an efficiency of about ~ 90%.

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“…The adsorbents based on Fe 3 O 4 @SiO 2 nanoparticles for the removal of the anionic CR and cationic MB dyes are summarized in Table 3 . The maximum adsorption capacity q max of the synthesized amino-functionalized Fe 3 O 4 @SiO 2 core-shell magnetic nanoparticles is comparable to other analogous adsorbents [ 10 , 23 , 24 , 29 , 34 ].…”

Section: Results and Discursionmentioning

confidence: 54%

“…These results prove that the adsorption process of these dyes on Fe 3 O 4 @SiO 2 -NH 2 NPs completely followed a the pseudo-second order kinetic model, suggesting that adsorption is dependent on the amount of the solute adsorbed on the surface of the adsorbent and the amount of active sites. It should be noted that the dye adsorption kinetics on magnetic nanoparticles is most often described in terms of the pseudo-second order model [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ].…”

Section: Results and Discursionmentioning

confidence: 99%

Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles for Dye Adsorption

et al. 2021

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Fe3O4@SiO2 core-shell nanoparticles (NPs) were synthesized with the co-precipitation method and functionalized with NH2 amino-groups. The nanoparticles were characterized by X-ray, FT-IR spectroscopy, transmission electron microscopy, selected area electron diffraction, and vibrating sample magnetometry. The magnetic core of all the nanoparticles was shown to be nanocrystalline with the crystal parameters corresponding only to the Fe3O4 phase covered with a homogeneous amorphous silica (SiO2) shell of about 6 nm in thickness. The FT-IR spectra confirmed the appearance of chemical bonds at amino functionalization. The magnetic measurements revealed unusually high saturation magnetization of the initial Fe3O4 nanoparticles, which was presumably associated with the deviations in the Fe ion distribution between the tetrahedral and octahedral positions in the nanocrystals as compared to the bulk stoichiometric magnetite. The fluorescent spectrum of eosin Y-doped NPs dispersed in water solution was obtained and a red shift and line broadening (in comparison with the dye molecules being free in water) were revealed and explained. Most attention was paid to the adsorption properties of the nanoparticles with respect to three dyes: methylene blue, Congo red, and eosin Y. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for all three dyes. The equilibrium data were more compatible with the Langmuir isotherm and the maximum adsorption capacity was reached for Congo red.

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Synthesis of Molecularly Imprinted Polymer on Magnetic Core-Shell Silica Nanoparticles for Recognition of Congo Red

Cited by 14 publications

References 30 publications

Sensitive Determination of 17β‐Estradiol using a Magneto Sensor Based on Magnetic Molecularly Imprinted Polymer

Sensitive Determination of 17β‐Estradiol using a Magneto Sensor Based on Magnetic Molecularly Imprinted Polymer

Synthesis of molecularly imprinted polymer for removal of Congo red

Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles for Dye Adsorption

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