Preparation of air stable nanoscale zero valent iron functionalized by ethylene glycol without inert condition

Ruiz-Torres, Claudio Adrian; Araujo-Martínez, René Fernando; Martínez-Castañón, Gabriel Alejandro; Morales-Sánchez, José Elpidio; Guajardo-Pacheco, Jesús María; González‐Hernández, J.; Lee, Tae-Jin; Shin, Hyun-Sang; Hwang, Yuhoon; Ruíz, Facundo

doi:10.1016/j.cej.2017.11.047

Cited by 41 publications

(30 citation statements)

References 59 publications

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“…However, this arrangement of structures is a behavior typically shown by nanomaterials of this type [7,9]. In addition, in our previous work, the formation of zero-valent iron nano-chains (in the presence and absence of a functionalizing agent, EG) was described in our previous study [15], which demonstrates that the nZVI arrangement in chain type structures is independent of particles surface modification, indicating that this behavior is directly related to the size and particle size distribution.…”

Section: Size Control Using Non-aqueous Solvent With Stabilization Agentmentioning

confidence: 55%

“…The structural characterization of the materials included crystallinity, morphology, size distribution analysis, and colloidal stability. In addition, size distribution analysis was used to compare the materials obtained in this work using non-aqueous methodology (nZVI-EG non-aq and S-nZVI non-aq ), and those obtained via surface modified nZVI generated using aqueous methodology (nZVI-EG aq ), as presented in our previous study [15]. The advantages of using methanol as solvent were also demonstrated.…”

Section: Introductionmentioning

confidence: 90%

“…This decrease in intensity is directly attributed to the metal-ligand binding, by the interaction between the O-atoms contained in the ligand molecule -OH of coated agent and Fe-atoms, by coordinated covalent bonds, thereby, decreasing the intensity of deformation by stretching of the O-H bond because of its attenuation. Indicating with this the material functionalization by EG [15,25]. Through this effect, the polymer grafted onto particle surfaces prevents their agglomeration and growth by effects of excluded volume.…”

Section: Fourier-transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

“…The functionalization mechanism in which EG is a stabilizing agent was previously reported [15]. Stabilization is performed by the interaction of the ligand molecule -OH contained in the EG chain with the Fe-atoms contained on the surface of the particle, by occupying the empty d-orbitals of the metal by lone electron pairs of the ligand molecule, thereby generating the monodentate coordination of the surface of the nanoparticle and the graft of polymer chains.…”

Section: Stabilization Mechanismsmentioning

confidence: 99%

“…For this reason, it is deduced that the current control is poor in this respect. In addition, in our previous study, we presented the effectiveness of ethylene glycol (EG) as functionalized agent for obtaining air-stable nZVI and achieving size-distribution control [15]. However, even with the presence of EG, particles of large diameter still occurred, which means that using this methodology is not enough to control the size of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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A cost-effective method to prepare size-controlled nanoscale zero-valent iron for nitrate reduction

Ruiz-Torres

Araujo-Martínez

Martínez-Castañón

et al. 2018

Environmental Engineering Research

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Nanoscale zero-valent iron (nZVI) has proved to be an effective tool in applied environmental nanotechnology, where the decreased particle diameter provides a drastic change in the properties and efficiency of nanomaterials used in water purification. However, the agglomeration and colloidal instability represent a problematic and a remarkable reduction in nZVI reactivity. In view of that, this study reports a simple and cost-effective new strategy for ultra-small (< 7.5%) distributed functionalized nZVI-EG (1-9 nm), with high colloidal stability and reduction capacity. These were obtained without inert conditions, using a simple, economical synthesis methodology employing two stabilization mechanisms based on the use of non-aqueous solvent (methanol) and ethylene glycol (EG) as a stabilizer. The information from UV-Vis absorption spectroscopy and Fourier transform infrared spectroscopy suggests iron ion coordination by interaction with methanol molecules. Subsequently, after nZVI formation, particle-surface modification occurs by the addition of the EG. Size distribution analysis shows an average diameter of 4.23 nm and the predominance (> 90%) of particles with sizes < 6.10 nm. Evaluation of the stability of functionalized nZVI by sedimentation test and a dynamic light-scattering technique, demonstrated very high colloidal stability. The ultra-small particles displayed a rapid and high nitrate removal capacity from water.

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Section: Size Control Using Non-aqueous Solvent With Stabilization Agentmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 90%

Section: Fourier-transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

Section: Stabilization Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A cost-effective method to prepare size-controlled nanoscale zero-valent iron for nitrate reduction

Ruiz-Torres

Araujo-Martínez

Martínez-Castañón

et al. 2018

Environmental Engineering Research

Self Cite

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Preparation of Melamine Foam Supported Nanoscale Zero Valent Iron and Its Application for Removal of Cr(VI) from Aqueous Solution and Hydrogenation of p‐Nitrophenol

2021

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In this work, PEG-nZVI@MF composites were prepared by immobilizing nanoscale zero valent iron (nZVI) on melamine foam (MF) through the incorporation of polyethylene glycol (PEG). As a monolithic, low-cost, and efficient catalyst, PEG-nZVI@MF catalyst showed excellent performance in the removal of Cr(VI) from aqueous solution and catalytical hydrogenation of p-nitrophenol (p-NP). The hydrogenation of p-NP by sodium borohydride was completed within 3 min, and PEG-nZVI@MF catalyst showed excellent catalytic performance without sacrificing catalytic activity during four cycle reactions. In addition, 99 % of Cr(VI) ions in an aqueous solution were removed within 15 min. Importantly, the novel composite could be simply separated by a common external magnet. This synthesis strategy here provided a simple method to prepare air stable nZVI composites for environment remediation.

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Synthesis and environmental applications of biochar-supported nano-zero-valent iron composites: a review

Zhong,

Lai,

Wang

et al. 2024

Environ Chem Lett

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Preparation of air stable nanoscale zero valent iron functionalized by ethylene glycol without inert condition

Cited by 41 publications

References 59 publications

A cost-effective method to prepare size-controlled nanoscale zero-valent iron for nitrate reduction

A cost-effective method to prepare size-controlled nanoscale zero-valent iron for nitrate reduction

Preparation of Melamine Foam Supported Nanoscale Zero Valent Iron and Its Application for Removal of Cr(VI) from Aqueous Solution and Hydrogenation of p‐Nitrophenol

Synthesis and environmental applications of biochar-supported nano-zero-valent iron composites: a review

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