Synthesis of Iron Nanoparticles via Chemical Reduction with Palladium Ion Seeds

Langmuir ◽  
2007 ◽  
Vol 23 (3) ◽  
pp. 1419-1426 ◽  
Author(s):  
Kuo-Cheng Huang ◽  
Sheryl H. Ehrman
Keyword(s):  
Iron Nanoparticles ◽  
Chemical Reduction ◽  
Palladium Ion

scholarly journals The convenient preparation of stable aryl-coated zerovalent iron nanoparticles

2015 ◽  
Vol 6 ◽  
pp. 1192-1198 ◽  
Author(s):  
Olga A Guselnikova ◽  
Andrey I Galanov ◽  
Anton K Gutakovskii ◽  
Pavel S Postnikov
Keyword(s):  
Iron Nanoparticles ◽  
Diazonium Salt ◽  
Chemical Reduction ◽  
Water Soluble ◽  
Zerovalent Iron ◽  
Iron Core ◽  
Organic Layer ◽  
Aryl Group ◽  
Surface Modified

A novel approach for the in situ synthesis of zerovalent aryl-coated iron nanoparticles (NPs) based on diazonium salt chemistry is proposed. Surface-modified zerovalent iron NPs (ZVI NPs) were prepared by simple chemical reduction of iron(III) chloride aqueous solution followed by in situ modification using water soluble arenediazonium tosylate. The resulting NPs, with average iron core diameter of 21 nm, were coated with a 10 nm thick organic layer to provide long-term protection in air for the highly reactive zerovalent iron core up to 180 °C. The surface-modified iron NPs possess a high grafting density of the aryl group on the NPs surface of 1.23 mmol/g. FTIR spectroscopy, XRD, HRTEM, TGA/DTA, and elemental analysis were performed in order to characterize the resulting material.

scholarly journals The Effect of Vacuum Annealing of Magnetite and Zero-Valent Iron Nanoparticles on the Removal of Aqueous Uranium

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
R. A. Crane ◽  
T. B. Scott
Keyword(s):  
Mine Water ◽  
Iron Nanoparticles ◽  
Vacuum Annealing ◽  
Chemical Reduction ◽  
Lower Surface ◽  
Zero Valent Iron ◽  
Near Surface ◽  
Oxygen Conditions ◽  
Complex Chemistry ◽  
Zero Valent Iron Nanoparticles

As-formed and vacuum annealed zero-valent iron nanoparticles (nano-Fe0) and magnetite nanoparticles (nano-Fe3O4) were tested for the removal of uranium from carbonate-rich mine water. Nanoparticles were introduced to batch systems containing the mine water under oxygen conditions representative of near-surface waters, with a uranyl solution studied as a simple comparator system. Despite the vacuum annealed nano-Fe0having a 64.6% lower surface area than the standard nano-Fe0, similar U removal (>98%) was recorded during the initial stages of reaction with the mine water. In contrast, ≤15% U removal was recorded for the mine water treated with both as-formed and vacuum annealed nano-Fe3O4. Over extended reaction periods (>1 week), appreciable U rerelease was recorded for the mine water solutions treated using nano-Fe0, whilst the vacuum annealed material maintained U at <50 μg L−1until 4 weeks reaction. XPS analysis of reacted nanoparticulate solids confirmed the partial chemical reduction ofUVItoUIVin both nano-Fe0water treatment systems, but with a greater amount ofUIVdetected on the vacuum annealed particles. Results suggest that vacuum annealing can enhance the aqueous reactivity of nano-Fe0and, for waters of complex chemistry, can improve the longevity of aqueous U removal.

Effect of Ni morphology on removal of pentachlorophenol with Fe/Ni nanomaterials

2016 ◽  
Vol 16 (3) ◽  
pp. 810-816
Author(s):  
Rong Cheng ◽  
Can Cheng ◽  
Peng Liu ◽  
Lei Shi ◽  
Zhong Ma
Keyword(s):  
Iron Nanoparticles ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Phenol Removal ◽  
Chlorinated Phenols ◽  
Chemical Reduction Method ◽  
Priority Pollutant ◽  
Magnetite Fe3o4 ◽  
Different Shapes ◽  
Wet Chemical

Chlorinated phenols are a kind of environmental priority pollutant that attract much attention. Nanosized Fe and Fe/Ni materials are considered as promising options for chlorinated phenol removal. The effect of Ni morphology on the removal of pentachlorophenol (PCP) with Fe/Ni nanomaterials was investigated in this study. Iron nanoparticles and nickel nanomaterials with different shapes were synthesized using a chemical reduction method and wet chemical techniques, respectively. The concentrations of PCP and chloride in solutions were measured with and without Ni present. The intermediates of PCP were also analyzed. The results showed that the dechlorination of PCP was promoted by Ni nanomaterials, among which the tubular porous Ni nanomaterials expressed the most promotion, then those with net shape and nanochains. However, the tubular porous Ni nanomaterials inhibited the removal of PCP, and the other two expressed a certain promotion. In the Fe/Ni system, Fe nanoparticles transformed into magnetite (Fe3O4) and/or maghemite (Fe2O3), and Ni nanomaterials were still pure Ni after reaction. The introduction of Ni nanomaterials would improve dechlorination of PCP, but the removal of PCP might be inhibited or improved as the morphology of Ni changed.

scholarly journals Fabrication of zero-valent iron nanoparticles by green and chemical reduction methods: Application in the field of antibacterial activities for medicinal point of view

2021 ◽  
Vol 8 (3) ◽  
pp. 118-122
Author(s):  
Manish Srivastava ◽  
Preeti Tomer ◽  
Anamika Srivastava ◽  
Swapnil Sharma
Keyword(s):  
Iron Nanoparticles ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Agar Plate ◽  
Antibacterial Activities ◽  
Point Of View ◽  
Size Analysis ◽  
Chemical Reduction Method ◽  
Reduction Methods ◽  
Zero Valent Iron Nanoparticles

In the area of life sciences,iron nanoparticles (Fe NPs) have many applications. In this paper, the unique properties of iron nanoparticles as antimicrobials are studied. In this study, nanoparticles of iron have been fabricated by green and chemical reduction method. With the help of FESEM analysis and Zeta size analysis, the usual value of nanoparticles was found to be 10-30 nm in size. Furthermore, the prepared nanoparticles were examined for antibacterial perspective aligned with gram-positive and negative strains namely Staphylococcus aureus & Bacillus subtilis and Escherichia coli, using agar plate method and IC was also estimated using tube dilution assay.

Structural Characterization of Iron Nanoparticles Synthesized by Chemical -Methods

2012 ◽  
Vol 1372 ◽  
Author(s):  
A. Ruíz-Baltazar ◽  
Claudia López ◽  
R. Pérez ◽  
G. Rosas
Keyword(s):  
Iron Nanoparticles ◽  
Chemical Reduction ◽  
Vinyl Pyrrolidone ◽  
Synthesis Methods ◽  
Transmission Electron ◽  
Metallic Salt ◽  
Vis Spectroscopy ◽  
Chloride Hexahydrate ◽  
Poly Vinyl Pyrrolidone

ABSTRACTDifferent synthesis methods has been employed to produce nanoparticles, however, chemical reduction method offer a effective route to obtained sizes nanoparticles controlled and morphologies very well defined. Iron nanoparticles were synthesized by chemical reduction using sodium borohydride (SB) NaBH4, Fe (III) Chloride hexahydrate (FeCl3·6H2O) as starting metallic salt (MS) and Poly-vinyl pyrrolidone (PVP) as surfactant agent. The nanoparticles have been characterized by transmission electron microscopy (TEM) and UV-Vis spectroscopy.

scholarly journals Biosynthesis and characterization of iron nanoparticles produced by Thymus vulgaris L. and their antimicrobial activity

2020 ◽  
Vol 79 (2) ◽  
pp. 114-120
Author(s):  
Ramy Sayed Yehia ◽  
Ali Mohammed Ali
Keyword(s):  
Electron Microscopy ◽  
Antimicrobial Activity ◽  
Iron Nanoparticles ◽  
Chemical Reduction ◽  
Nanoparticle Synthesis ◽  
Thymus Vulgaris ◽  
Metallic Ions ◽  
Leaf Extracts ◽  
Vis Spectroscopy

Research in the area of nanoparticles has grown considerably in recent years. Plant leaf extracts provide a platform for nanoparticle synthesis from metal and metal oxides, which is more economical and environmentally friendly than other methods, such as chemical reduction and physical methods. The present study conducted the biosynthesis of iron nanoparticles (FeNPs) using Thymus vulgaris L. (Thyme) leaf aqueous extract. The characterization of FeNPs was carried out by transmission electron microscopy (TEM), UV-visible spectrophotometry (UV-Vis), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-Ray diffraction (XRD) techniques. UV-vis spectroscopy analysis demonstrated a visible peak around 440 nm. FTIR demonstrated the presence of iron metallic ions. Structural analysis of the nanoparticles by TEM showed agglomerations of spherical shapes. The average size of the synthesized FeNPs was around 40 nm. Regarding application, the ability of the FeNPs to degrade methyl orange was recorded as 95%. They were also examined for potential antimicrobial activity against pathogenic Gram-positive and Gram-negative bacteria and fungi. FeNPs demonstrated high antifungal activity against Candida albicans, C. parapsilosis and Aspergillus flavus, while their antibacterial activity was much weaker compared to commercial antibacterial agent. Thus, FeNPs synthesized using T. vulgaris could play an important role in controlling C. albicans, C. parasilosis and A. flavus and bioremediation of dyes.

scholarly journals Effect of the Surfactant on the Growth and Oxidation of Iron Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Alvaro Ruíz-Baltazar ◽  
Rodrigo Esparza ◽  
Gerardo Rosas ◽  
Ramiro Pérez
Keyword(s):  
Iron Oxide ◽  
High Resolution ◽  
Iron Nanoparticles ◽  
Chemical Reduction ◽  
Synthesis Process ◽  
Mechanism Of Formation ◽  
Oxidative Etching ◽  
Fe Nanoparticles ◽  
Scanning Transmission ◽  
Branched Nanostructures

Fe nanoparticles and branched nanostructures of iron oxide were synthesized by chemical reduction in aqueous phase. The mechanism of formation of iron oxides as a function of the amount of surfactant employed during the synthesis process was studied. Specifically Fe, Fe2O3, and Fe3O4nanoparticles were obtained. The oxidation of Fe to Fe3O4and finally to Fe2O3was carried out by oxidative etching process, decreasing the amount of stabilizer agent. The structures obtained were characterized by high resolution (HRTEM) and scanning/transmission (STEM) electron microcopies, energy dispersive spectroscopy (EDS), and optical spectroscopy (UV-Vis and IR).

scholarly journals Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Nukleonika ◽  
2017 ◽  
Vol 62 (4) ◽  
pp. 269-275 ◽  
Author(s):  
Sanduni Y. Ratnayake ◽  
Anoma K. Ratnayake ◽  
Dieter Schild ◽  
Edward Maczka ◽  
Elzbieta Jartych ◽  
...  
Keyword(s):  
Drinking Water ◽  
Nitrate Reduction ◽  
Iron Nanoparticles ◽  
Chemical Reduction ◽  
Reduction Process ◽  
Green Technology ◽  
Zerovalent Iron ◽  
Grafted Copolymer ◽  
Ph Values ◽  
Zerovalent Iron Nanoparticles

Abstract This research specifically focused on the development of a novel methodology to reduce excess nitrate in drinking water utilizing zerovalent iron nanoparticles (nZVI)-stabilized radiation-grafted copolymer matrix. nZVI was synthesized by borohydrate reduction of FeCl3 and stabilized on acrylic acid (AAc)-grafted non-woven polyethylene/polypropylene (NWPE/PP-g-AAc) copolymer matrix, which was grafted using gamma radiation. The use of nZVI for environmental applications is challenging because of the formation of an oxide layer rapidly in the presence of oxygen. Therefore, radiation-grafted NWPE/PP synthetic fabric was used as the functional carrier to anchor nZVI and enhance its spreading and stability. The chemical reduction of nitrate by nZVI-adsorbed NWPE/PP-g-AAc (nZVI-Ads-NWP) fabric was examined in batch experiments at different pH values. At low pH values, the protective layers on nZVI particles can be readily dissolved, exposing the pure iron particles for efficient chemical reduction of nitrate. After about 24 h, at pH 3, almost 96% of nitrate was degraded, suggesting that this reduction process is an acid-driven, surface-mediated process. The nZVI-water interface has been characterized by the 1-pK Basic Stern Model (BSM). An Eley-Rideal like mechanism well described the nitrate reduction kinetics. In accordance with green technology, the newly synthesized nZVI-Ads-NWP has great potential for improving nitrate reduction processes required for the drinking water industry.

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