Facile preparation of magnetic chitosan modified with thiosemicarbazide for adsorption of copper ions from aqueous solution

Cui, Jingjing; Wang, Xiaoyu; Zeng, Guangming

doi:10.1002/app.44528

Cited by 9 publications

(3 citation statements)

References 47 publications

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Section: Resultsmentioning

confidence: 99%

“…Moreover, the US irradiation plays a significant rule in the synthesis, obtaining a quick healing and a homogeneous dispersion material. In contrast, Jing-Jing Cui and coworkers [41] synthesized surface-modified magnetite-chitosan nanoparticles with thiosemicarbazide, and observed changes in the magnetite crystalline structure, suggesting a non-efficient chitosan coating. The diffractograms were refined by Rietveld method and the obtained parameters such as weighted profile R-factor (Rwp), goodness of fit index (χ 2 ), lattice parameters (a, b and c) and diameter crystallite size (D) with its respective standard deviation values, were summarized in Table 1.…”

Section: X-ray Powder Diffractionmentioning

confidence: 94%

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Magnetic Porous Controlled Fe3O4–Chitosan Nanostructure: An Ecofriendly Adsorbent for Efficient Removal of Azo Dyes

et al. 2020

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In this work, chitosan/magnetite nanoparticles (ChM) were quickly synthesized according to our previous report based on co-precipitation reaction under ultrasound (US) irradiation. Besides ChM was in-depth structurally characterized, showing a crystalline phase corresponding to magnetite and presenting a spheric morphology, a “nanorod”-type morphology was also obtained after increasing reaction time for eight minutes. Successfully, both morphologies presented a nanoscale range with an average particle size of approximately 5–30 nm, providing a superparamagnetic behavior with saturation magnetization ranging from 44 to 57 emu·g−1. As ChM nanocomposites have shown great versatility considering their properties, we proposed a comparative study using three different amine-based nanoparticles, non-surface-modified and surface-modified, for removal of azo dyes from aqueous solutions. From nitrogen adsorption–desorption isotherm results, the surface-modified ChMs increased the specific surface area and pore size. Additionally, the adsorption of anionic azo dyes (reactive black 5 (RB5) and methyl orange (MO)) on nanocomposites surface was pH-dependent, where surface-modified samples presented a better response under pH 4 and non-modified one under pH 8. Indeed, adsorption capacity results also showed different adsorption mechanisms, molecular size effect and electrostatic attraction, for unmodified and modified ChMs, respectively. Herein, considering all results and nanocomposite-type structure, ChM nanoparticles seem to be a suitable potential alternative for conventional anionic dyes adsorbents, as well as both primary materials source, chitosan and magnetite, are costless and easily supplied.

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Section: Resultsmentioning

confidence: 99%

Section: X-ray Powder Diffractionmentioning

confidence: 94%

Magnetic Porous Controlled Fe3O4–Chitosan Nanostructure: An Ecofriendly Adsorbent for Efficient Removal of Azo Dyes

et al. 2020

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“…The acquired results are well-matched to standard JCPDS File No. 65-3107 [36,37]. The diffraction patterns at around 2θ = 20 • correspond to the amorphous silica shell, which covers the core Fe 3 O 4 for strengthening the outer structure [38].…”

Section: Reusability/regeneration Studiesmentioning

confidence: 99%

One-Step Fabrication of Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles as a Potential Novel Platform for Removal of Cadmium (II) from Aqueous Solution

et al. 2022

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Fe3O4@SiO2-NH2 core-shell magnetic nanoparticles were developed by a rapid one-step precipitation route followed by reverse microemulsion and amine functionalization. In this study, an Fe3O4@SiO2-NH2 nanoparticle was used to evaluate its adsorption efficiency for the treatment of a synthetic solution of Cd(II) ion. The structural and physicochemical properties of Fe3O4@SiO2-NH2 nanoparticles were characterized by XRD, SEM-EDAX, TEM, FTIR and TGA. From the TEM analysis, the morphology of Fe3O4@SiO2-NH2 was found as 100–300 nm. In TGA, the first weight loss was noticed between 373 and 573 K, the second was between 673 and 773 K and the final weight loss took place above 773 K. Batch experimental tests, such as pH, dosage of Fe3O4@SiO2-NH2, Cd(II) ion concentration, temperature as well as interaction time, were conducted and evaluated. Experimental study data were used for the non-linear forms exhibited by isotherms and kinetics of the sorption procedure. The equilibrium adsorption observations were adequately combined with pseudo-first-order kinetics as well as Freundlich isotherm. Monolayer maximum adsorption capacity was found to be 40.02 mg/g, recorded at pH 6 with an interaction time of 30 min, temperature of 303 K and sorbent dose of 2.0 g/L. The thermodynamic study indicated that the adsorption process was an exothermic, spontaneous reaction (−∆oo = −15.46–7.81 (kJ/mol)). The as-synthesized sorbent had excellent recyclability, and its adsorption efficiency was maintained after five cycles of reuse. The findings of the study exhibited the magnetic Fe3O4@SiO2-NH2-nanoparticle as an alternative effective adsorbent in eradicating Cd(II) ions from aqueous solution.

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Adsorption/Reduction Behaviors of Modified Cellulose Aerogels for the Removal of Low Content of Cr(VI)

et al. 2020

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Facile preparation of magnetic chitosan modified with thiosemicarbazide for adsorption of copper ions from aqueous solution

Cited by 9 publications

References 47 publications

Magnetic Porous Controlled Fe3O4–Chitosan Nanostructure: An Ecofriendly Adsorbent for Efficient Removal of Azo Dyes

Magnetic Porous Controlled Fe3O4–Chitosan Nanostructure: An Ecofriendly Adsorbent for Efficient Removal of Azo Dyes

One-Step Fabrication of Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles as a Potential Novel Platform for Removal of Cadmium (II) from Aqueous Solution

Adsorption/Reduction Behaviors of Modified Cellulose Aerogels for the Removal of Low Content of Cr(VI)

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