Synthesis of cobalt nanoparticles from [bis(2-hydroxyacetophenato)cobalt(II)] by thermal decomposition

Polyhedron ◽  
2009 ◽  
Vol 28 (6) ◽  
pp. 1065-1068 ◽  
Author(s):  
Masoud Salavati-Niasari ◽  
Zeinab Fereshteh ◽  
Fatemeh Davar
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles

Preparation of Metallic Cobalt Nanoparticles by the Thermal Decomposition of CoC2O4. 2H2O Precursor in the Argon Gas

2011 ◽  
Vol 127 ◽  
pp. 85-88 ◽  
Author(s):  
Xiao Ming Fu
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles ◽  
Cobalt Powder ◽  
Metallic Cobalt ◽  
Crystal Water ◽  
Argon Gas ◽  
Pyrolytic Decomposition ◽  
Two Stages

Metallic cobalt nanoparticles are successfully obtained by the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The pyrolysates of CoC2O4. 2H2O were investigated by TG-DSC and SEM. The results showed that there are two stages in the process of the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The crystal water in CoC2O4. 2H2O was lost from 150 °C to 275 °C. CoC2O4was pyrolysized into metallic cobalt powder from 300 °C to 500 °C. At the same time, the pattern of pyolysate of CoC2O4. 2H2O was fined at 347.7 °C for 10 min. But, the particles of pyolysate of CoC2O4. 2H2O were sintered into cobalt blocks at 500.0 °C for 10 min. Therefore, the conditions of pyrolytic decomposition of CoC2O4. 2H2O were controlled if single cobalt powder was obtained at 500.0 °C..

Effect of surfactants on the size and shape of cobalt nanoparticles synthesized by thermal decomposition

2006 ◽  
Vol 99 (8) ◽  
pp. 08N702 ◽  
Author(s):  
Huiping Shao ◽  
Yuqiang Huang ◽  
HyoSook Lee ◽  
Yong Jae Suh ◽  
ChongOh Kim
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles ◽  
Size And Shape

Cobalt nanoparticles synthesis from Co(CH3COO)2 by thermal decomposition

2006 ◽  
Vol 304 (1) ◽  
pp. e28-e30 ◽  
Author(s):  
Huiping Shao ◽  
Yuqiang Huang ◽  
HyoSook Lee ◽  
Yong Jae Suh ◽  
Chong Oh Kim
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles ◽  
Nanoparticles Synthesis

Ionic Additives and Weak Magnetic Fields in the Thermal Decomposition of Octacarbonyldicobalt - Tools To Control the Morphology of Cobalt Nanoparticles

2011 ◽  
Vol 2012 (2) ◽  
pp. 198-202 ◽  
Author(s):  
Axel Dreyer ◽  
Michael Peter ◽  
Jochen Mattay ◽  
Katrin Eckstädt ◽  
Andreas Hütten ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Magnetic Fields ◽  
Cobalt Nanoparticles ◽  
Weak Magnetic Fields

Preparation of cobalt nanoparticles from [bis(salicylidene)cobalt(II)]–oleylamine complex by thermal decomposition

2008 ◽  
Vol 320 (3-4) ◽  
pp. 575-578 ◽  
Author(s):  
Masoud Salavati-Niasari ◽  
Fatemeh Davar ◽  
Mehdi Mazaheri ◽  
Maryam Shaterian
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles

Effect of PVP on the morphology of cobalt nanoparticles prepared by thermal decomposition of cobalt acetate

2006 ◽  
Vol 6 ◽  
pp. e195-e197 ◽  
Author(s):  
Huiping Shao ◽  
Yuqiang Huang ◽  
HyoSook Lee ◽  
Yong Jae Suh ◽  
Chong Oh Kim
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Acetate ◽  
Cobalt Nanoparticles

Cobalt nanoparticles embedded in porous N-doped carbon as long-life catalysts for hydrolysis of ammonia borane

2016 ◽  
Vol 6 (10) ◽  
pp. 3443-3448 ◽  
Author(s):  
Haixia Wang ◽  
Yaran Zhao ◽  
Fangyi Cheng ◽  
Zhanliang Tao ◽  
Jun Chen
Keyword(s):  
Thermal Decomposition ◽  
Ammonia Borane ◽  
Cobalt Nanoparticles ◽  
Long Life ◽  
Hydrolysis Of

Cobalt nanoparticles uniformly embedded in porous N-doped carbon prepared through the thermal decomposition of Co(salen) are promising catalysts for hydrolysis of ammonia borane.

Applications of Photoelectron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 506-507
Author(s):  
William J. Baxter
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Chemical Composition ◽  
Ultraviolet Radiation ◽  
Thin Layer ◽  
Edge Effects ◽  
Electron Optics ◽  
Surface Layers ◽  
Crystalline Orientation ◽  
Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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