The removal of mercury ion pollution by using Fe3O4-nanocellulose: Synthesis, characterizations and DFT studies

Zarei, Saeid; Niad, Mahmood; Raanaei, Hossein

doi:10.1016/j.jhazmat.2017.10.009

Cited by 123 publications

(35 citation statements)

References 59 publications

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“…The elemental maps show a uniform distribution of these elements in the nanostructures, which may characterize the formation of magnetite cores covered with carbon. Similar results were obtained by Rostami-Vartooni, Moradi-Saadatmand and Mahdavi 38 and Zarei, Niad and Raanaei39 , that synthesized carbon/Fe 3 O 4 nanocomposite and Fe 3 O 4 -nanocellulose compounds, respectively, and observed similar characteristics.…”

supporting

confidence: 87%

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

et al. 2019

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Tetracycline is used to treat various diseases in animals and humans, so its high use causes this substance to be frequently found in effluents and in potable water reservoirs, causing serious problems for human health and the environment. Many processes are applied and evaluated in an attempt to removal tetracycline found in environment, such as adsorption. The application of iron-carbon nanoparticles with core-shell structure (Fe 3 O 4 @C) as adsorbent, can be an alternative to removal of these contaminants. In the present study Fe 3 O 4 @C nanoparticles were synthesized and used to adsorb tetracycline in aqueous solutions. The core-shell characterization was performed using X-ray diffraction techniques, infrared spectroscopy, surface area, chemical analysis and morphology, and adsorption capacity through isotherms. The results indicated that Fe 3 O 4 @C nanoparticles presented good tetracycline removal capability, 73.3%, when applied an initial concentration of antibiotic of the 30 mg L-1 and 0.5 g of adsorbent.

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supporting

confidence: 87%

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

et al. 2019

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“…Because FeCl 3 ⋅6H 2 O was used in excess, both Fe 2+ and Fe 3+ coexisted in the system. After addition of NH 3 ⋅H 2 O, Fe 3 O 4 NPs were quickly synthesized through a well‐known coprecipitation method (equation ); meanwhile, the MoO 3 template was gradually etched to soluble ions (equation ) . In a round‐bottom flask, four reactions took place in parallel or consecutively without interfering with each other, and hollow mesoporous PPy nanotubes decorated with Pd and Fe 3 O 4 NPs were prepared in one step.…”

Section: Resultsmentioning

confidence: 99%

A simple approach for synthesis of hollow mesoporous nanotubes loaded with metallic and magnetic nanoparticles: Only one step is required

Jia

Tong

et al. 2019

Applied Organom Chemis

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Hollow mesoporous polypyrrole (PPy)@Pd‐Fe3O4 nanotubes were prepared using MoO3 nanorods as hard templates in one step, in which construction of PPy nanotubes, preparation of Pd nanoparticles, synthesis of Fe3O4 nanoparticles and removal of MoO3 nanorods were combined together. To the best of our knowledge, this is the simplest approach for the synthesis of nanomaterials with catalytic activity, magnetic property and hollow mesoporous structure simultaneously. Although the preparation procedure was simplified, the catalytic activity and magnetic property were not sacrificed. In the catalytic reduction of 4‐nitrophenol, both reaction rate constant and turnover frequency were higher than those of previous reports. Importantly, the nanotubes could be easily separated from the reaction solution in the presence of a magnetic field, and saturation magnetization could be controlled by the amount of pyrrole monomer. After six recycles, the catalytic activity maintained 94.8% of that of the first run, indicating good stability and reusability.

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“…Oxides, such as CuO x [7,8], FeO x [9,10], CeO x [11,12] and MnO x [13][14][15], with high redox properties, exhibit great potential for Hg 0 adsorption. Among these oxides, MnO x is a commonly available and inexpensive material has received extensive attention due to the redox couples of Mn 2+ /Mn 3+ and Mn 3+ /Mn 4+ [16].…”

Section: Introductionmentioning

confidence: 99%

Promoting Effect of the Core-Shell Structure of MnO2@TiO2 Nanorods on SO2 Resistance in Hg0 Removal Process

Zhang

Han

et al. 2020

Catalysts

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Sorbent of αMnO2 nanorods coating TiO2 shell (denoted as αMnO2-NR@TiO2) was prepared to investigate the elemental mercury (Hg0) removal performance in the presence of SO2. Due the core-shell structure, αMnO2-NR@TiO2 has a better SO2 resistance when compared to αMnO2 nanorods (denoted as αMnO2-NR). Kinetic studies have shown that both the sorption rates of αMnO2-NR and αMnO2-NR@TiO2, which can be described by pseudo second-order models and SO2 treatment, did not change the kinetic models for both the two catalysts. In contrast, X-ray photoelectron spectroscopy (XPS) results showed that, after reaction in the presence of SO2, S concentration on αMnO2-NR@TiO2 surface is lower than on αMnO2-NR surface, which demonstrated that TiO2 shell could effectively inhibit the SO2 diffusion onto MnO2 surface. Thermogravimetry-differential thermosgravimetry (TG-DTG) results further pointed that SO2 mainly react with TiO2 forming Ti(SO4)O in αMnO2-NR@TiO2, which will protect Mn from being deactivated by SO2. These results were the reason for the better SO2 resistance of αMnO2-NR@TiO2.

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The removal of mercury ion pollution by using Fe3O4-nanocellulose: Synthesis, characterizations and DFT studies

Cited by 123 publications

References 59 publications

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

A simple approach for synthesis of hollow mesoporous nanotubes loaded with metallic and magnetic nanoparticles: Only one step is required

Promoting Effect of the Core-Shell Structure of MnO2@TiO2 Nanorods on SO2 Resistance in Hg0 Removal Process

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