Controllable synthesis, characterization, and magnetic properties of nanoscale zerovalent iron with specific high Brunauer–Emmett–Teller surface area

Wang, Qiliang; Kanel, Sushil R.; Park, Hosik; Ryu, Anna; Choi, Heechul

doi:10.1007/s11051-008-9524-7

Cited by 49 publications

(32 citation statements)

References 20 publications

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“…Green rusts are highly reactive structures comprising [38][39][40][41][42][43][44][45][46][47][48][49][50] alternating positively and negatively charged hydroxide/ peroxide layers and hydrated anion layers with the general composition [Cation a I Cation c II Cation b III (OH) m (OOH) d ] x+ [(A y/nv yiH 2 O] x− . A is an anion (e.g., Cl − , SO 4 2− , CO 3 2− , Br − , I − , nO 3 − , ClO 4 − , SO 3 2− , SeO 4 2− , PO 4 2− , OH − , OOH − , O x y− , etc. A is an anion (e.g., Cl − , SO 4 2− , CO 3 2− , Br − , I − , nO 3 − , ClO 4 − , SO 3 2− , SeO 4 2− , PO 4 2− , OH − , OOH − , O x y− , etc.…”

Section: Contaminants Removed By N-fe 0 N-cu 0 and N-almentioning

confidence: 99%

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)

Antia¹

2014

Nanomaterials for Environmental Protection

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Section: Contaminants Removed By N-fe 0 N-cu 0 and N-almentioning

confidence: 99%

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)

Antia¹

2014

Nanomaterials for Environmental Protection

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“…According to IUPAC recommendations, the linear part of the BET plot was chosen for BET surface area calculations . The average BET surface area of the fresh and aged samples was 13.27 and 34.62 m 2 /g, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Zero‐Valent Iron Nanoparticles Via Electrical Wire Explosion for Efficient Removal of Heavy Metals

Seyedi

Rabiee

Shahabadi

et al. 2017

CLEAN Soil Air Water

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In this paper, electrical wire explosion (EWE) was used as a simple, clean, in situ method to synthesise nano zero-valent iron (nZVI) particles in liquid mediums. The structural and physical properties of the synthesised nZVI particles were characterised by x-ray diffraction, Brunauer-Emmett-Teller analysis, field emission scanning electron microscopy and transmission electron microscopy. The synthesised spherical nanoparticles, at a specific size of 10-50 nm, possessed large surface areas of approximately 13.27 m 2 /g, reinforcing the significant advantages of EWE, that is, less aggregation and in situ production of nanoparticles with enhanced removal efficacy, for groundwater treatment. After 1 h the adsorption capacity for Cr(VI), Ni(II), and Cd(II) (Q 60 ¼ C ions /C iron (mg/g)) at pH 4 was approximately 143.4 (89.0%), 137.5 (79.0%), and 132.6 mg/g (72.0%), respectively. The effect of temperature was also examined at initial metal ions concentration of 70 mg/L, nZVI dosage of 0.2 g/L and pH 4. The results showed 45°C was the optimum temperature for adsorption of Cr(VI), Ni(II), and Cd(II) ions, and over a 60-min period at this temperature adsorption capacity increased to 153.56 (95.3%), 158.91 (91.3%), and 163.90 mg/g (89.0%), respectively.Abbreviations: BET, Brunauer-Emmett-Teller; EWE, electrical wire explosion; FE-SEM, field emission scanning electron microscopy; ICP-OES, inductively coupled plasma-optical emission spectrometry; nZVI, nano zero-valent iron; TEM, transmission electron microscopy; XPS, x-ray photoelectron spectroscopy; XRD, x-ray diffraction.

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“…ZVI is still used as an electron source in the treatment of Cr(VI), while the oxide shell only promotes the adsorption of Cr(VI) [38]. This microstructure is similar to that of ZVI particles [39][40][41] prepared by chemical agents. Illustrated in Figure 1g, the observed microscopic area was evenly distributed on the surface of iron, which indicated that the load of nZVI was very uniform without large area agglomeration.…”

Section: Characterization Of Nzvi-macmentioning

confidence: 87%

Preparation of Activated Carbon Supported Bead String Structure Nano Zero Valent Iron in a Polyethylene Glycol-Aqueous Solution and Its Efficient Treatment of Cr(VI) Wastewater

et al. 2019

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Nanometer zero-valent iron (nZVI) has been widely used in the treatment of heavy metals such as hexavalent chromium (Cr(VI)). A novel composite of bead string-structured nZVI on modified activated carbon (nZVI-MAC) is prepared here, using polyethylene glycol as the stable dispersant rather than traditional ethanol during the loading process. The microstructure characterization shows that nZVI particles are loaded on MAC with a bead string structure in large quantity and stably due to the addition of hydroxyl functional groups on the surface by polyethylene glycol. Experiments on the treatment of Cr(VI) in wastewater show that the reaction process requires only 20 min to achieve equilibrium. The removal rate of Cr(VI) with a low concentration (80-100 mg/L) is over 99% and the maximum saturation removal capacity is up to 66 mg/g. The system converts Cr(VI) to trivalent chromium (Cr(III)) through an oxidation-reduction effect and forms an insoluble material with iron ions by coprecipitation, which is then adsorbed on the surface of the nZVI-MAC. The process conforms to the quasi-second order adsorption kinetics equation (mainly chemical adsorption process).

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Controllable synthesis, characterization, and magnetic properties of nanoscale zerovalent iron with specific high Brunauer–Emmett–Teller surface area

Cited by 49 publications

References 20 publications

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)

Synthesis of Zero‐Valent Iron Nanoparticles Via Electrical Wire Explosion for Efficient Removal of Heavy Metals

Preparation of Activated Carbon Supported Bead String Structure Nano Zero Valent Iron in a Polyethylene Glycol-Aqueous Solution and Its Efficient Treatment of Cr(VI) Wastewater

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Controllable synthesis, characterization, and magnetic properties of nanoscale zerovalent iron with specific high Brunauer–Emmett–Teller surface area

Cited by 49 publications

References 20 publications

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe0, Cu0, Al0), n‐FeHn+, n‐Fe(OH)x, n‐FeOOH, n‐Fe‐[OxHy](n+/−)

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe0, Cu0, Al0), n‐FeHn+, n‐Fe(OH)x, n‐FeOOH, n‐Fe‐[OxHy](n+/−)

Synthesis of Zero‐Valent Iron Nanoparticles Via Electrical Wire Explosion for Efficient Removal of Heavy Metals

Preparation of Activated Carbon Supported Bead String Structure Nano Zero Valent Iron in a Polyethylene Glycol-Aqueous Solution and Its Efficient Treatment of Cr(VI) Wastewater

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Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)

Groundwater Water Remediation by Static Diffusion Using Nano‐Zero Valent Metals (Fe⁰, Cu⁰, Al⁰), n‐FeHⁿ⁺, n‐Fe(OH)_x, n‐FeOOH, n‐Fe‐[O_xH_y]^(n+/−)