Application of CoFe2O4@SiO2@Chitosan Nanoparticles for Cadmium (II) Preconcentration in Totally Different Samples and its Determination through ETAAS

Naghizadeh, Matin; Taher, Mohammad Ali; Tamaddon, Ali‐Mohammad

doi:10.1007/s12633-020-00663-3

Cited by 8 publications

(3 citation statements)

References 55 publications

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“…Magnetic catalysts typically have MFe 2 O 4 general formula which M referring to a divalent cation. [32][33][34][35][36][37][38][39][40] In presented method, magnetically separable CoFe 2 O 4 / SiO 2 À SO 3 H as a green and efficient solid acid catalyst, was prepared by modification of CoFe 2 O 4 /SiO 2 with chlorosulfonic acid (Scheme 1). CoFe 2 O 4 NPs were synthesized via co-precipitation method.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, magnetic nanoparticles (MNPs) as a class of less toxic and inexpensive heterogeneous catalysts which can readily separate from the reaction mixture (by an external magnet), [24–31] attracted most attention in field of the catalyst preparation. Magnetic catalysts typically have MFe 2 O 4 general formula which M referring to a divalent cation [32–40] …”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Mahdipour

Moradi

Mirzaie³

2022

ChemistrySelect

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Sulfonic acid functionalized silica coated cobalt ferrite nanoparticles (CoFe2O4/SiO2−SO3H) was prepared as an efficient solid acid catalyst for the green synthesis of dihydropyrimido[4,5‐b]quinolinetrione derivatives. CoFe2O4 NPs were prepared by co‐precipitation method and then the silica‐coated CoFe2O4 NPs were modified with chlorosulfonic acid. Obtained CoFe2O4/SiO2−SO3H was characterized by thermo gravimetric analysis (TGA), Fourier transform‐infrared spectroscopy (FT‐IR), scanning electron microscope (SEM), energy‐dispersive X‐ray spectroscopy (EDX), X‐ray diffraction (XRD) and vibrating‐sample magnetometer (VSM). The magnetically separable CoFe2O4/SiO2−SO3H was successfully used for the four component reaction of barbituric acid, dimedone, amines (or ammonium acetate) and benzaldehyde derivatives for the synthesis of dihydropyrimido[4,5‐b]quinolinetriones under thermal and ultrasound conditions. The advantages of presented simple protocol are the easily separation of magnetic catalyst from the reaction medium by an external magnet, short reaction times, green reaction conditions in addition to simple workup and high yield of products.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Mahdipour

Moradi

Mirzaie³

2022

ChemistrySelect

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“…HA are a sort of macromolecule organic matter that exists in soil and sources of drinking water storage and have a negative surface charge such as carboxylic (-COOH) and phenolic (-OH) which linked with aromatic rings [7,8,[10][11][12]. The presence of HA in the water can lead to a yellowish to brown color, taste, and odor problems that are aesthetically unpleasant and can also lead to Blackfoot diseases, cancer, and goiter.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Nano Zero valent Iron/Biopolymer Composite with Antibacterial Properties for Simultaneous Removal of Nitrate and Humic Acid: Kinetics and Isotherm Studies

2021

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This investigation compared the adsorption behavior of humic acid (HA) on cellulose, chitosan and nano zerovalent iron/chitosan (nZVI/chitosan). Results show that nZVI/chitosan is very effective in the adsorption of HA from aqueous media. The feasibility of using nZVI/chitosan as an adsorbent for the simultaneous removal of nitrate and HA from aqueous media was also studied.Structural analyses of the samples were identified by TEM, FT-IR, EDX, XRD and N2 isotherms.The effects of pH, amount of composite, nitrate concentration, HA concentration and contact time and their interactions on responses were explored by central composite design (CCD) and response surface methodology (RSM). The optimal conditions of pH (5.5), adsorbent amount (0.098 g), reaction time (27 min) and initial concentrations (110 mg/L for nitrate and 30 mg/L for HA) were obtained from desirability function. The adsorption properties of the resulting nanocomposite toward nitrate and HA were investigated through kinetic and isotherm adsorption studies. The adsorption kinetics was found to fit the pseudo-second order model. The results obtained indicate that nitrate uptake fitted well with the Langmuir model while the Freundlich isotherm was the best model for describing the multilayer uptake of HA from aqueous solutions. Moreover, nZVI/chitosan nanocomposite illustrates a very high antibacterial activity against pathogen bacteria strains such as Staphylococcus aureus ATCC 25935, ATCC 25923, and Pseudomonas aeruginosa ATCC 27853. The findings reported in this investigation highlight the potential of using nZVI/chitosan as a promising adsorbent for the simultaneous removal of nitrate and HA from aqueous solutions.

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Metronidazole adsorption by bio-synthesized silver-zinc ferrite nanoadsorbent in presence of chitosan from aqueous media: response surface methodology

Rajabi,

Derakhshan,

Hashemi

et al. 2024

Appl Water Sci

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A novel magnetic biocomposite adsorbent, denoted as AgZnFe2O4@Ch, was utilized for the degradation of Metronidazole (MNZ) from water. Various analytical techniques, including vibrating sample magnetometer (VSM), X-ray diffraction (XRD), Brunauer–Emmett–Teller, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy (FESEM), were applied to investigate the characteristics of the magnetic biocomposite adsorbent. XRD examination confirmed the formation of spinel ferrites phases. FESEM assessment indicated a notable reduction in sample aggregation. The ferromagnetic character of the adsorbent was well demonstrated by VSM analysis. The saturation magnetization value for straightforward separating by the outside magnetic fields was 14.64 emu/g. An analytical modeling approach was used to evaluate and analyze the impacts of factors including MNZ initial concentration, temperature, contact time, adsorbent dosage, and pH. Optimized conditions involved an adsorbent dosage of 0.9 g/L, pH of 7, MNZ initial concentration of 10 mg/L, and a contact time of 50 min, resulting in a peak adsorption efficiency of 65.53% under favorable circumstances. A good degree of fit was achieved with the linear model. The experimental equilibrium data fitting to the Langmuir, Freundlich, and Temkin isotherm models demonstrates that the Langmuir model was an effective and appropriate model for evaluating adsorption. Intraparticle kinetic modeling was also shown to be better suitable for characterizing the MNZ adsorption onto the adsorbent. The thermodynamic analysis indicated that the process of MNZ adsorption by AgZnFe2O4@Ch was characterized by exothermicity and lacked spontaneity.

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Application of CoFe2O4@SiO2@Chitosan Nanoparticles for Cadmium (II) Preconcentration in Totally Different Samples and its Determination through ETAAS

Cited by 8 publications

References 55 publications

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Fabrication of Nano Zero valent Iron/Biopolymer Composite with Antibacterial Properties for Simultaneous Removal of Nitrate and Humic Acid: Kinetics and Isotherm Studies

Metronidazole adsorption by bio-synthesized silver-zinc ferrite nanoadsorbent in presence of chitosan from aqueous media: response surface methodology

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Application of CoFe2O4@SiO2@Chitosan Nanoparticles for Cadmium (II) Preconcentration in Totally Different Samples and its Determination through ETAAS

Cited by 8 publications

References 55 publications

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe2O4 as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe2O4 as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Fabrication of Nano Zero valent Iron/Biopolymer Composite with Antibacterial Properties for Simultaneous Removal of Nitrate and Humic Acid: Kinetics and Isotherm Studies

Metronidazole adsorption by bio-synthesized silver-zinc ferrite nanoadsorbent in presence of chitosan from aqueous media: response surface methodology

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Product

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Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions

Green Synthesis of Dihydropyrimido[4,5‐b]quinolinetriones by Sulfonic Acid‐Functionalized Silica‐Coated CoFe₂O₄ as a Solid Acid Nanocatalyst under Thermal and Ultrasonic Conditions