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..

Preparation of Nickel Nanoparticles by the Thermal Decomposition of NiC2O4. 2H2O Precursor in the Argon Gas

2011 ◽  
Vol 403-408 ◽  
pp. 3136-3139
Author(s):  
Xiao Ming Fu
Keyword(s):  
Thermal Decomposition ◽  
Particle Size ◽  
Nickel Powder ◽  
Nickel Nanoparticles ◽  
Crystal Water ◽  
Argon Gas ◽  
Influence Of Temperature ◽  
Pyrolytic Decomposition ◽  
Influence Of Temperature On ◽  
Two Stages

Nickel nanoparticles are successfully obtained by the pyrolytic decomposition of NiC2O4. 2H2O in the argon gas. The pyrolysates of NiC2O4. 2H2O in the argon gas are investigated by TG-DSC and TEM. The results show that there are two stages in the process of the pyrolytic decomposition of NiC2O4. 2H2O in the argon gas. The crystal water in NiC2O4. 2H2O is lost from 200 °C to 300 °C. NiC2O4 is pyrolysized into nickel powder from 325 °C to 425 °C. At the same time, the influence of temperature on the particle size of the decomposition is more from 254.4 °C to 407.5 °C. The influence of temperature on the particle size of the decomposition is less from 407.5 °C to 450.0 °C. Therefore, the pyrolytic condition of NiC2O4. 2H2O in the air is controlled if nickel nanoparticles are prepared.

Preparation of Spherical NiO Nanoparticles by the Thermal Decomposition of NiC2O4 2H2O Precursor in the Air

2011 ◽  
Vol 228-229 ◽  
pp. 34-37 ◽  
Author(s):  
Xiao Ming Fu ◽  
Zai Zhi Yang
Keyword(s):  
Thermal Decomposition ◽  
Nio Nanoparticles ◽  
Crystal Water ◽  
Pyrolytic Decomposition ◽  
Sem And Tem ◽  
Two Stages

The pyrolysates of NiC2O4. 2H2O in the air were investigated by TG-DSC, SEM and TEM. The results showed that there are two stages in the process of the pyrolytic decomposition of NiC2O4. 2H2O in the air. The crystal water in NiC2O4. 2H2O was lost from 175 °C to 275 °C. NiC2O4 was pyrolysized into NiO from 325 °C to 400 °C. In the process of the pyrolytic decomposition of NiC2O4. 2H2O, the influence on the pattern of the decomposition was more from 246.5 °C to 357.8 °C. The influence on the pattern of the decomposition was less from 357.8 °C to 400.0 °C. Therefore, the pyrolytic condition of NiC2O4. 2H2O in the air was controlled if the effective pattern of NiO powder was obtained. At the same time, spherical NiO of about 5 nm is obtianed through the pyrolytic decomposition of NiC2O4. 2H2O at 400 °C for 10 min at the rate of 10 °C / min.

High peroxidase-like activity of metallic cobalt nanoparticles encapsulated in metal–organic frameworks derived carbon for biosensing

2018 ◽  
Vol 255 ◽  
pp. 2050-2057 ◽  
Author(s):  
Wenfei Dong ◽  
Yunxia Zhuang ◽  
Siqi Li ◽  
Xiaodan Zhang ◽  
Hongxiang Chai ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Cobalt Nanoparticles ◽  
Metallic Cobalt ◽  
Metal Organic

Influence of Cadmium Oxide on Thermal Hazard of AP-CMDB Propellants

2015 ◽  
Vol 1095 ◽  
pp. 419-422 ◽  
Author(s):  
Hao Nan Jia ◽  
Gui E Lu ◽  
Zhen Tao An ◽  
Jin Yong Jiang ◽  
Qiang Ge ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
Decomposition Rate ◽  
Initial Temperature ◽  
Cadmium Oxide ◽  
Thermal Hazard ◽  
Test Results ◽  
Thermal Safety ◽  
Scanning Calorimetry ◽  
Two Stages

The influence of cadmium oxide on the thermal decomposition behaviors of AP-CMDB propellants was studied by differential scanning calorimetry (DSC) and accelerating rate calorimetry (ARC). The test results show that the decomposition process of AP-CMDB can be divided into two stages. Cadmium oxide can increase the initial temperature, slow down the decomposition rate and improve the thermal safety of AP-CMDB.

Thermal Decomposition and Flame Retardance Behavior of Nanometer Magnesium Oxychloride Crystal Salt Involved in SMC

2009 ◽  
Vol 66 ◽  
pp. 163-166 ◽  
Author(s):  
Jian Li ◽  
Zhi Xiong Huang ◽  
Ying Zhao
Keyword(s):  
Thermal Decomposition ◽  
Flame Retardance ◽  
Scanning Calorimetry ◽  
Structural Water ◽  
Crystal Water ◽  
Molding Compound ◽  
Sheet Molding Compound ◽  
Initial Stage ◽  
Magnesium Oxychloride ◽  
Decomposition Behavior

A detailed study of thermal decomposition behavior of nanometer magnesium oxychloride crystal salt involved in sheet molding compound has been carried out using differential scanning calorimetry, thermogravimetry and X-ray diffraction. The decomposing temperature changed from 112°C at the initial stage to 559°C at the end of the process. The results indicated that the thermal decomposition was carried out in the following three steps: releasing crystal water, then HCl secondly and finally structural water, the residua was magnesia. Nanometer magnesium oxychloride crystal salt addictives was used as flame retardance in sheet molding compound.

scholarly journals Thermal Decomposition and Thermal Reaction Process of PTFE/Al/MnO2 Fluorinated Thermite

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2451 ◽  
Author(s):  
Jun Zhang ◽  
Junyi Huang ◽  
Xiang Fang ◽  
Yuchun Li ◽  
Zhongshen Yu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Control Systems ◽  
Thermal Reaction ◽  
Reaction Process ◽  
Reaction Products ◽  
Subsequent Reaction ◽  
Comparison Results ◽  
Different Temperatures ◽  
Xrd Phase Analysis ◽  
Two Stages

To better understand the thermal decomposition and reaction process of a fluorine-containing powdery thermite, PTFE/Al/MnO2, reactions at different temperatures were investigated by the TG/DSC-MS technique. The corresponding reaction products were characterized with XRD phase analysis. Another three thermite materials, i.e., PTFE/Al, Al/MnO2, and PTFE/MnO2, were also prepared for comparison. Results showed that PTFE behaved as both oxidizer and reducer in PTFE/Al/MnO2 fluorinated thermite. The thermal decomposition and reaction process of as-fabricated ternary thermite could be divided into two stages—the mutual reaction between each of PTFE, Al, and MnO2 and the subsequent reaction produced between Al and Mn2O3/Mn3O4/MnF2. Compared with the three control systems, the specially designed ternary system possessed a shorter reaction time, a faster energy release rate, and a better heat release performance.

Kinetics on the Isothermal Decomposition of Oil Shale

2012 ◽  
Vol 581-582 ◽  
pp. 112-116 ◽  
Author(s):  
Hua Qing Xue ◽  
Hong Yan Wang ◽  
Gang Yan ◽  
Wei Guo ◽  
Xiao Bo Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Oil Shale ◽  
Kinetics Model ◽  
Isothermal Kinetics ◽  
Temperature Error ◽  
Isothermal Decomposition ◽  
Oil Shale Pyrolysis ◽  
Two Stages ◽  
Kinetics Of ◽  
Rapid Conversion

The kinetics of the thermal decomposition of Huadian oil shale was studied at five different isothermal atmospheres of 623K, 648K, 673K, 698K, and 723K. The temperature recorded was that of the sample that the temperature error between furnace and sample will eliminate. According to conversion data, the effect of increased temperature is to decrease the pyrolysis time. The conversion data described the oil shale pyrolysis as two stages, rapid conversion and modest conversion. The Arrhenius equations of ki=1.40×105e-109828/RT and kii=1.76×106e-130463/RT were obtain by isothermal kinetics model for each stage.

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
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