scholarly journals Functionalization and Area-Selective Deposition of Magnetic Carbon-Coated Iron Nanoparticles from Solution

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Erika Widenkvist ◽  
Oscar Alm ◽  
Mats Boman ◽  
Ulf Jansson ◽  
Helena Grennberg
Keyword(s):  
Chemical Modification ◽  
Iron Nanoparticles ◽  
Selective Deposition ◽  
Oxidative Etching ◽  
Carboxylic Groups ◽  
Carbon Coated ◽  
Magnetic Carbon ◽  
Modification Of The Surface ◽  
Functionalized Particles

A route to area-selective deposition of carbon-coated iron nanoparticles, involving chemical modification of the surface of the particles, is described. Partial oxidative etching of the coating introduces carboxylic groups, which then are esterified. The functionalized particles can be selectively deposited on the Si areas of Si/SiO2substrates by a simple dipping procedure. Nanoparticles and nanoassemblies have been analyzed using SEM, TEM, and XPS.

Adsorption of Heavy Metal Ions with Magnetic Carbon-Coated Iron Nanoparitcles

2012 ◽  
Vol 490-495 ◽  
pp. 3049-3053 ◽  
Author(s):  
Jin Shan Pang ◽  
Ai Hua Deng ◽  
Ling Bo Mao ◽  
Jin Chen ◽  
Xiao Jun Peng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Iron Nanoparticles ◽  
Adsorption Property ◽  
Acid Solutions ◽  
Iron Particles ◽  
Adsorption Characteristics ◽  
Carbon Coated ◽  
Magnetic Carbon

Magnetic carbon-coated iron nanoparitcles were employed as adsorbent to study the adsorption characteristics of some metal ions, such as Cr, Ni, Cu, Pb, Zn. The effect of solution conditions such as pH, amounts of adsorbent, the co-existent ions was investigated. The results show that adsorption property of carbon-coated iron particles to heavy metal ions is improved at the condition of treated by H2O2, and at pH 8-9.5, Cr、Ni、Cu、Pb and Zn were retained on 30mg carbon-coated iron nanoparticles after shaking 3 min, and could be eluted by acid solutions(pH=1~2).

IR laser-induced chemical vapor deposition of carbon-coated iron nanoparticles embedded in polymer

2005 ◽  
Vol 15 (40) ◽  
pp. 4311 ◽  
Author(s):  
L. Díaz ◽  
M. Santos ◽  
C. Ballesteros ◽  
M. Maryško ◽  
J. Pola
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Iron Nanoparticles ◽  
Chemical Vapor ◽  
Ir Laser ◽  
Carbon Coated

Peparation and Magnetic Propriety of Carbon-Coated Iron Magnetic Nanoparticles by Starch Coating Method

2012 ◽  
Vol 164 ◽  
pp. 17-20
Author(s):  
Jin Chen ◽  
Hai Yan Zhang
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Iron Nanoparticles ◽  
Low Cost ◽  
Carbon Layer ◽  
Spherical Particles ◽  
Ferric Nitrate ◽  
Iron Core ◽  
Scanning Calorimetry ◽  
Carbon Coated

We synthesized carbon-coated iron magnetic nanoparticles by a low cost method using Ferric nitrate as the iron precursor and starch as both reductive agent and carbon source under H2 atmosphere. The structure, size distribution, phase composition, magnetic properties and oxidation resistance of the particles were investigated by transmission electron microscopy, X-ray diffraction, vibrating sample magnetometry and differential scanning calorimetry. The results show that the carbon-coated iron nanoparticles are spherical particles with a diameter of 20-40 nm. They are particles of core-shell structure with an iron core inside and an onion skin carbon layer outside, carbon layer can protect inner iron core from been oxidized, the hysteresis curves show that they are super paramagnetic materials. At the same time the annealing can change the magnetic properties of carbon coated iron nanoparticles.

An activation-free route to porous magnetic carbon adsorbents for the removal of phenolic compounds

2019 ◽  
Vol 43 (27) ◽  
pp. 10792-10802 ◽  
Author(s):  
Przemysław Strachowski ◽  
Wojciech Kiciński ◽  
Maciej Fronczak ◽  
Waldemar Kaszuwara ◽  
Piotr Baranowski ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Iron Nanoparticles ◽  
Carbon Adsorbents ◽  
Magnetic Composite ◽  
Carbon Xerogels ◽  
Magnetic Carbon ◽  
Organic Xerogel ◽  
Composite Carbon

Magnetic composite carbon xerogels were synthesized via acidic gelation of resorcinol and furfural in the presence of carbon-encapsulated iron nanoparticles with subsequent carbonization of the as-obtained magnetic organic xerogel.

P-34: The Influence of Chemical Modification of the Surface of RGB Phosphors on Their Low-Voltage CL Properties

1998 ◽  
Vol 29 (1) ◽  
pp. 585 ◽  
Author(s):  
S. A. Bukesov ◽  
N. V. Nikishin ◽  
A. O. Dmitrienko ◽  
S. L. Shmakov ◽  
J. M. Kim
Keyword(s):  
Chemical Modification ◽  
Low Voltage ◽  
Modification Of The Surface

Nearly monodispersed carbon coated iron nanoparticles for the catalytic growth of nanotubes/nanofibres

2004 ◽  
Vol 13 (2) ◽  
pp. 362-370 ◽  
Author(s):  
F. Dumitrache ◽  
I. Morjan ◽  
R. Alexandrescu ◽  
R.E. Morjan ◽  
I. Voicu ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Catalytic Growth ◽  
Carbon Coated

Physical and chemical modification of the surface of Venus by windblown particles

Nature ◽  
1987 ◽  
Vol 327 (6120) ◽  
pp. 313-315 ◽  
Author(s):  
Ronald Greeley ◽  
John R. Marshall ◽  
James B. Pollack
Keyword(s):  
Chemical Modification ◽  
Physical And Chemical ◽  
Modification Of The Surface

NONTRADITIONAL METHOD OF CHEMICAL MODIFICATION OF THE SURFACE OF POROUS SILICA

2020 ◽  
Vol 54 (1 (251)) ◽  
pp. 33-37
Author(s):  
T.O. Kamalyan
Keyword(s):  
Chemical Modification ◽  
Porous Silica ◽  
Chemical Transport Reaction ◽  
Transport Reaction ◽  
Texture Parameters ◽  
Nontraditional Method ◽  
Modification Method ◽  
Gaseous Intermediate ◽  
Proposed Modification ◽  
Modification Of The Surface

The main results obtained in the study of the possibility of low-temperature chemical modification of porous silica, applying various nanodispersed substances to their surface are given. It has been shown that the use of the chemical transport reaction (CTR) $ \mathrm{H_{2}O_{2}/ZnO} $ for this purpose with the participation of $ \mathrm{H_{2}O_{2}} $ vapors at room temperature makes it possible to apply a number of oxides, sulfides and metal halides to the surface of various sorbents. An important advantage of the proposed modification method is that changes in the original texture parameters of the substrate are minimized. Using the example of modifying the behavior of highly pure $ \mathrm{SiO_{2}} $ with zinc oxide, it was shown that the decomposition of gaseous intermediate products of CTR $ \mathrm{H_{2}O_{2}/ZnO} $ occurs mainly in pores with a diameter of more than $ 6~nm $.

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