scholarly journals Activated carbon-doped with iron oxide nanoparticles (a-Fe2O3 NPs) preparation: particle size, shape, and impurity

2018 ◽  
Vol 11 (10) ◽  
pp. 33-40 ◽  
Author(s):  
Settakorn Upasen
Keyword(s):  
Particle Size ◽  
Activated Carbon ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Carbon Doped

Synthesis of iron oxide nanoparticles in a continuous flow spiral microreactor and Corning® advanced flow™ reactor

2018 ◽  
Vol 7 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Prashant L. Suryawanshi ◽  
Shirish H. Sonawane ◽  
Bharat A. Bhanvase ◽  
Muthupandian Ashokkumar ◽  
Makarand S. Pimplapure ◽  
...  
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Continuous Flow ◽  
Xrd Analysis ◽  
Resonance Spectroscopy ◽  
Oxide Nanoparticles ◽  
Flow Rates ◽  
Nanometer Size Range ◽  
Co Precipitation

AbstractIn the present work, synthesis of iron oxide nanoparticles (NPs) using continuous flow microreactor (MR) and advanced flow™ reactor (AFR™) has been investigated with evaluation of the efficacy of the two types of MRs. Effect of the different operating parameters on the characteristics of the obtained NPs has also been investigated. The synthesis of iron oxide NPs was based on the co-precipitation and reduction reactions using iron (III) nitrate precursor and sodium hydroxide as reducing agents. The iron oxide NPs were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, and X-ray diffraction (XRD) analysis. The mean particle size of the obtained NPs was less than 10 nm at all flow rates (over the range of 20−60 ml/h) in the case of spiral MR, while, in the case of AFR™, the particle size of NPs was below 20 nm with no specific trend observed with the operating flow rates. The XRD and TEM analyses of iron oxide NPs confirmed the crystalline nature and nanometer size range, respectively. Further, magnetic properties of the synthesized iron oxide NPs were studied using electron spin resonance spectroscopy; the resonance absorption peak shows theg-factor values as 2.055 and 2.034 corresponding to the magnetic fields of 319.28 and 322.59 mT for MR and AFR™, respectively.

Distinguishing magnetic particle size of iron oxide nanoparticles with first-order reversal curves

2014 ◽  
Vol 116 (12) ◽  
pp. 124304 ◽  
Author(s):  
Monika Kumari ◽  
Marc Widdrat ◽  
Éva Tompa ◽  
Rene Uebe ◽  
Dirk Schüler ◽  
...  
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Particle ◽  
Oxide Nanoparticles ◽  
First Order

scholarly journals Effects of Change PH on The Structural and Optical Properties of Iron Oxide Nanoparticles

2021 ◽  
Vol 32 (3) ◽  
pp. 58
Author(s):  
Raad S. Sabry ◽  
Muslim A. Abid ◽  
Sarah Q. Hussein
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Sem Images ◽  
Stabilizing Agents ◽  
E Coli ◽  
Gram Positive Bacteria ◽  
Different Shapes ◽  
Inhibition Zones

Iron oxide nanoparticles were made using celery extract by chemical method with change PH. Bio-materials in celery extract synthesized the iron oxide nanoparticles by reducing iron (III) chloride (FeCl3) and then acted as both capping and stabilizing agents. The iron oxide NPs were characterized by XRD, SEM, and UV–vis techniques. The change PH affected the size, shape, and purity of iron oxide NPs. XRD results showed Crystallite size increased from 16.71nm to 21.65nm as pH was increased from 1.6 to 12. SEM images showed that the particle size of (α-Fe2O3) NPs was around 40.06 nm, while increasing PH showed different shapes in the same sample.  The particle size became approximately 45.56 and 61.22 nm. UV–vis measurements showed the energy band increased from 3.11eV to 5.11eV. The antimicrobial activity of iron oxide NPs was determined by growth inhibition zones of the negative gram bacteria E. coli, Klebsiella spp, and gram-positive bacteria S. aureus, S. epidermidis, and fungal Candida albicans. The zones for (α-Fe2O3) NPs when PH 1.6 was between (12-13) mm. The zones for (α-Fe2O3) NPs when PH 12 was a little higher between (13-15) mm.

scholarly journals A study on heterogeneous Fenton regeneration of powdered activated carbon impregnated with iron oxide nanoparticles

2016 ◽  
Vol 18 (2) ◽  
pp. 259-268 ◽  
Keyword(s):  
Activated Carbon ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Membrane Separation ◽  
Powdered Activated Carbon ◽  
Bet Surface Area ◽  
Oxide Nanoparticles ◽  
Solution Ph ◽  
Material Optimization ◽  
High Regeneration

<p>This paper reports on the fabrication, characterization and testing of iron oxide nanoparticles &ndash; powdered activated carbon (PAC) composites for water treatment and PAC regeneration by Fenton reactions. Different wet impregnation procedures and iron loadings were assessed in terms of organic micropollutant adsorption, by using the pharmaceutical diclofenac (DCF) as model compound. The preparation of a ferrihydrite-impregnated PAC with low iron content (~40.7 mg<sub>Fe</sub>/g<sub>PAC</sub>) and high BET surface area (1037 m<sup>2 </sup>g<sup>-1</sup>) was found to be the optimum, exhibiting excellent DCF adsorption capacity, similar to that of the original PAC (203 mg<sub>DCF</sub>/g<sub>PAC/Fe</sub>), with the adsorption isotherm satisfactorily fitted by both the Freundlich and Langmuir models. The regeneration of the ferrihydrite-PAC (Fe/PAC) indicated that the presence of iron-oxide nanoparticles is important for achieving a high regeneration efficiency by hydrogen peroxide, even at neutral pH. However, the solution pH had a significant effect on DCF uptake, being greater at acidic pH after the regeneration of the composite. Ongoing R&amp;D is aimed at material optimization and testing in a novel hybrid process scheme developed in author&rsquo;s laboratory, involving a continuous Fe/PAC &ndash; Fenton process in conjunction with a low pressure membrane separation process.&nbsp;</p>

Superparamagnetic Iron Oxide Nanoparticles for Magnetic Hipertermia: Synthesis, Surface Modification by Polyethylene Glycol and Characterization

2014 ◽  
Vol 802 ◽  
pp. 535-539 ◽  
Author(s):  
Fernanda A. Sampaio da Silva ◽  
Edwin E.G. Rojas ◽  
Sérgio Romero ◽  
Marcos Flávio de Campos
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Magnetic Hyperthermia ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Biocompatible Polymer ◽  
Coprecipitation Process

Nowadays, superparamagnetic iron oxide nanoparticles are an important tool for cancer treatment, such as magnetic hyperthermia. The goal is heating diseased tissue and then tumor cells are destroyed. Magnetic nanoparticles are promising mainly because they have specific ability to reduce side effects. However, forin vivoapplications, nanoparticles need to be coated by a biocompatible material. In this work, nanoparticles are coated by PEG (biocompatible polymer). Samples were produced by coprecipitation process. Information about particle size, magnetic properties and crystallinity were obtained.

Development of an activated carbon impregnation process with iron oxide nanoparticles by green synthesis for diclofenac adsorption

2019 ◽  
Vol 27 (6) ◽  
pp. 6088-6102 ◽  
Author(s):  
Carole Silveira ◽  
Quelen Letícia Shimabuku-Biadola ◽  
Marcela Fernandes Silva ◽  
Marcelo Fernandes Vieira ◽  
Rosângela Bergamasco
Keyword(s):  
Activated Carbon ◽  
Iron Oxide ◽  
Green Synthesis ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Impregnation Process
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