Characterization of oxygen passivated iron nanoparticles and thermal evolution to γ-Fe2O3

2004 ◽  
Vol 39 (15) ◽  
pp. 4877-4885 ◽  
Author(s):  
T. C. Rojas ◽  
J. C. Sánchez-López ◽  
J. M. Greneche ◽  
A. Conde ◽  
A. Fernández
Keyword(s):  
Iron Nanoparticles ◽  
Thermal Evolution

scholarly journals Synthesis and Magnetic Characterization of Graphite-Coated Iron Nanoparticles

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
A. M. Espinoza-Rivas ◽  
M. A. Pérez-Guzmán ◽  
R. Ortega-Amaya ◽  
J. Santoyo-Salazar ◽  
C. D. Gutiérrez-Lazos ◽  
...  
Keyword(s):  
Magnetite Nanoparticles ◽  
Iron Nanoparticles ◽  
Vapour Deposition ◽  
Magnetic Measurements ◽  
Chemical Vapour ◽  
Hydrogen Atmosphere ◽  
Iron Core ◽  
Carbon Excess ◽  
Raman Characterization

Graphite-coated iron nanoparticles were prepared from magnetite nanoparticles by chemical vapour deposition (CVD) under methane and hydrogen atmosphere. After being purified from carbon excess, graphite-coated iron nanoparticles were tested for morphological and magnetic properties. It was found that, during the thermal process, magnetite nanoparticles 6 nm in size coalesce and transform into graphite-coated iron 200 nm in size, as revealed by scanning electron microscopy (SEM). Raman characterization assessed that high-quality graphite coats the iron core. Magnetic measurements revealed the phase change (magnetite to iron) as an increase in the saturation magnetization from 50 to 165 emu/g after the CVD process.

scholarly journals Preparation and Characterization of Natural Zeolite Modified with Iron Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Alvaro Ruíz-Baltazar ◽  
Rodrigo Esparza ◽  
Maykel Gonzalez ◽  
Gerardo Rosas ◽  
Ramiro Pérez
Keyword(s):  
Kinetic Models ◽  
Iron Nanoparticles ◽  
Morphological Characterization ◽  
Adsorption Kinetic ◽  
X Ray Diffraction ◽  
Modified Zeolite ◽  
X Ray ◽  
Transmission Electron ◽  
Zeolite Modification

This study is aimed at investigating the structural and morphological characterization of natural and modified zeolite obtained from the state of Oaxaca (Mexico). Iron nanoparticles were used for the zeolite modification. The iron nanoparticles were loaded on the zeolite surface by homogeneous nucleation. Adsorption kinetic models of pseudo first and second order were surveyed. The characterization of pristine and modified zeolite was performed by Fourier transform infrared (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD). From the results, three main phases were identified: clinoptilolite, mordenite, and feldspar. We could also determine the adsorption capacity of the zeolites by means of adsorption kinetic models.

Synthesis and characterization of passivated iron nanoparticles

2016 ◽  
Vol 26 (6) ◽  
pp. 549-551 ◽  
Author(s):  
Michail I. Alymov ◽  
Nikolai M. Rubtsov ◽  
Boris S. Seplyarskii ◽  
Victor A. Zelensky ◽  
Alexey B. Ankudinov
Keyword(s):  
Iron Nanoparticles ◽  
Synthesis And Characterization

Preparation and characterization of magnetic iron nanoparticles encapsulated in mesoporous silica: The effects of reduction procedure and pore size

2013 ◽  
Vol 112 ◽  
pp. 20-22 ◽  
Author(s):  
Nan-Nan Wang ◽  
Shuang-Qin Zeng ◽  
Xin Guan ◽  
Yong Wang ◽  
Hai-Feng Cheng ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Pore Size ◽  
Iron Nanoparticles ◽  
Reduction Procedure
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