Synthesis and application of amine functionalized silica mesoporous magnetite nanoparticles for removal of chromium(VI) from aqueous solutions

Shariati, Shahab; Khabazipour, Maryam; Safa, Fariba

doi:10.1007/s10934-016-0245-5

Cited by 43 publications

(16 citation statements)

References 33 publications

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“…According to previous studies, the Fe 3 O 4 @SiO 2 ‐CMK‐8 NPs were synthesized as previously stated. Figure shows a schematic of the synthesis process.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of nano‐sized magnetite mesoporous carbon for removal of Reactive Yellow dye from aqueous solutions

Toutounchi

Shariati

Mahanpoor

2019

Applied Organom Chemis

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In this study, core‐shell structures of magnetite nanoparticles coated with CMK‐8 ordered mesoporous carbon (Fe3O4@SiO2‐CMK‐8 NPs) have been successfully synthesized for the first time by carbonizing sucrose inside the pores of the Kit‐6 mesoporous silica. The nano‐sized mesoporous particles were characterized by X‐ray diffraction, Fourier transform‐infrared spectroscopy, scanning electron microscope, dynamic light scattering, vibrating‐sample magnetometer, Brunauer–Emmett–Teller (BET) and transmission electron microscopy instruments. The obtained nanocomposite was used for removal of Reactive Yellow 160 (RY 160) dye from aqueous samples. The N2 adsorption–desorption method (at 77 K) confirmed the mesoporous structure of synthesized Fe3O4@SiO2‐CMK‐8 NPs. Also, the surface area was calculated by the BET method and Langmuir plot as 276.84 m2/g and 352.32 m2/g, respectively. The surface area, volume and pore diameter of synthesized nanoparticles (NPs) were calculated from the pore size distribution curves using the Barrett–Joyner–Halenda formula (BJH). To obtain the optimum experimental variables, the effect of various experimental parameters on the dye removal efficiency was studied using Taguchi orthogonal array experimental design method. According to the experimental results, about 90.0% of RY 160 was removed from aqueous solutions at the adsorbent amount of 0.06 g, pH 3 and ionic strength = 0.05 m during 10 min. The pseudo‐second order kinetic model provided a very good fit for the RY 160 dye removal (R2 = 0.999). The Langmuir, Freundlich, Temkin and Dubinin–Radushkevich models were applied to describe the equilibrium isotherms, and the Langmuir isotherm showed the best fit to data with the maximum adsorption capacity of 62.893 mg/g. Furthermore, the Fe3O4@SiO2‐CMK‐8 NPs could be simply recovered by external magnet, and exhibited recyclability and reusability for a subsequent six runs.

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“…According to previous studies, the Fe 3 O 4 @SiO 2 ‐CMK‐8 NPs were synthesized as previously stated. Figure shows a schematic of the synthesis process.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of nano‐sized magnetite mesoporous carbon for removal of Reactive Yellow dye from aqueous solutions

Toutounchi

Shariati

Mahanpoor

2019

Applied Organom Chemis

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“…Recently, core-shell structured mesoporous silica-based materials consisting of magnetic nanoparticle cores have attracted increasing research interest [43][44][45][46][47][48][49] . For instance, Sun et al [45] prepared Fe3O4-SiO2-CTS-PEI which demonstrated a maximum Cr(VI) adsorption capacity of 236.4mg/g.…”

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confidence: 99%

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Lai

Sun

Hou

et al. 2018

Adv Materials Inter

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Developing low-cost and highly efficient adsorbents for the removal of toxic heavy metal ions has been the subject of intensive research with the increasingly stringent water pollution control standards. In this paper, three types of amino-functionalized multi-layer core-shell mesoporous organosilica nanospheres (MCMONs) have been synthesized using an indirect co-condensation method for Cr(VI) removal applications. Results show that amino groups have been successfully immobilized on the nanospheres and these amino-functionalized MCMONs exhibit unique organic-inorganic multi-layer core-shell structures . When used as adsorbent for Cr(VI) removal, our N-(3-trimethoxysilylpropyl)diethylenetriamine functionalized MCMONs exhibits an maximum adsorption capacity of 279.92 mg/g at initial Cr(VI) concentration of 150 mg/L. This is about 20% greater than the highest Cr(VI) adsorption capacity previously reported for other core-shell silica-based adsorbents, demonstrating the great potential of our MCMONs in Cr(VI) removal applications.

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“…Fe 3 O 4 MNPs were synthesized with method described in literature. [23,26] Briefly, 9.3 g of FeCl 3 .6H 2 O, 6.0 g of FeCl 2 .4H 2 O and 4.5 ml of HCl (12 mol L −1 ) were dissolved in 75 ml of deionized water in order to prepare stock solution of ferrous and ferric chloride. This solution was degassed with purging nitrogen gas (99%) for 20 min.…”

Section: Preparation Of Fe 3 O 4 Mnpsmentioning

confidence: 99%

“…Up to now, MNPs have been used as a cheap and recoverable adsorbent for preconcentration or removal of some organic and inorganic chemicals from different media. Many researchers have used the MNPs with or without surface modification for dye, lignin and metal ions . Also, some studies show the applicability of magnetite modified carbon nanotubes for removal of dye pollutants from natural waste .…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers have used the MNPs with or without surface modification for dye, [21][22][23][24] lignin [25] and metal ions. [26] Also, some studies show the applicability of magnetite modified carbon nanotubes for removal of dye pollutants from natural waste. [27,28] Also, MNPs are used as catalyst in different organic synthesis, [29][30][31][32][33] for example amino functionalized nano Fe 3 O 4 @SiO 2 as a magnetically green catalyst for the one-pot synthesis of spirooxindoles under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of propyl aminopyridine modified magnetite nanoparticles for cadmium (II) adsorption in aqueous solutions

Rad

Kefayati

Shariati

2018

Applied Organom Chemis

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In this study, 2‐aminopyridine functionalized magnetite nanoparticles were chemically synthesized and used for removing Cd2+ ions from aqueous solutions. The synthesized nanoparticles were characterized by Fourier transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive analysis of X‐rays (EDX), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The SEM results showed the synthesized magnetite nanoparticles have particle size around 26 nm. The effects of several variables including solution pH and volume, adsorbent mass, ionic strength and contact time on the Cd2+ adsorption were studied in batch experiments and finally the optimum conditions for adsorption were obtained. The kinetic data were investigated by pseudo‐ first‐order, pseudo‐ second‐order, intraparticle diffusion and Elovich kinetic models and data were described reasonably by pseudo‐ second‐order model (R2 = 0.9996) with qe = 2.31 mg g−1. Adsorption data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The results indicated that the data were well fitted to the Freundlich isotherm model (R2 = 0.9907). After study the possible interference effect of foreign ions on Cd2+ removal, the applicability of the proposed nanoparticles for adsorption from real samples confirmed the successfully removal of Cd2+ ions with removal efficiency higher than 92%. The obtained results showed that the synthesized nanoparticles as a reusable adsorbent can act as a good choice for Cd2+ removal with an easy procedure.

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Synthesis and application of amine functionalized silica mesoporous magnetite nanoparticles for removal of chromium(VI) from aqueous solutions

Cited by 43 publications

References 33 publications

Synthesis of nano‐sized magnetite mesoporous carbon for removal of Reactive Yellow dye from aqueous solutions

Synthesis of nano‐sized magnetite mesoporous carbon for removal of Reactive Yellow dye from aqueous solutions

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Synthesis of propyl aminopyridine modified magnetite nanoparticles for cadmium (II) adsorption in aqueous solutions

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