Facile Synthesis and Electrochemical Characterization of PbO@C Nanocomposites

2012 ◽  
Vol 268-270 ◽  
pp. 189-192
Author(s):  
Chao Yang Liu ◽  
Jian Guo Yu ◽  
Jun Qin Fan ◽  
Yong Nan Zhao ◽  
Xu Fei Xue
Keyword(s):  
Specific Capacity ◽  
Carbon Matrix ◽  
Nitrogen Atmosphere ◽  
Particle Sizes ◽  
Facile Synthesis ◽  
Discharge Current Density ◽  
High Specific Capacity ◽  
Electrochemical Tests ◽  
Highly Dispersed

PbO@C nanocomposites were synthesized by soaking maize in Pb(NO3)2 solutions followed by calcination in nitrogen atmosphere. TEM photos showed highly dispersed PbO nanoparticles homogeneously embedded in the carbon matrix and the main particle sizes of PbO were distributed between 15-29 nm. Electrochemical tests revealed a high specific capacity of 152.6 Fg-1 and good stability at discharge current density of 1.0 Ag-1.

scholarly journals Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 15999-16003 ◽  
Author(s):  
Xiaodi Guo ◽  
Hongpeng Kan ◽  
Xinxin Liu ◽  
Hongshuai Geng ◽  
Lianying Wang
Keyword(s):  
Solid State ◽  
Nickel Hydroxide ◽  
Carbon Matrix ◽  
High Loading ◽  
Ni Nanoparticles ◽  
Facile Synthesis ◽  
Graphitized Carbon ◽  
Highly Dispersed

Hollow hierarchical Ni@C nanocomposites with highly dispersed Ni nanoparticles (NPs) embedded in well-graphitized carbon matrix have been synthesized by solid-state pyrolysis of simple, well-defined organic–inorganic layered nickel hydroxide.

PRiME2020_B01-1102

2020 ◽  
Author(s):  
SOYEUN KIM
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Thermal Shock ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbon Matrix ◽  
Composite Anode ◽  
High Specific Capacity ◽  
Fast Charging ◽  
One Step

We propose a technology for preparations of novel Si-NPs/carbon(Si/C) composites on the basis of thermal shock of the carbon materials such as natural and artificial graphites. We developed a facile, one-step carbothermal shock method for transformations from micro-Si to Si-NPs less than 150 nm size and well dispersed on carbon matrix (Figure 1.). The particle size distribution of the Si-NPs was narrow and the dispersion was uniform. The Si/C composite anode exhibited a high specific capacity (>1,000 mAh/g) and predominant fast charging behavior.

Facile synthesis of carbon–NiCoO2 composite microspheres with pitaya-type structure and their application in supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74643-74648 ◽  
Author(s):  
Yongchao Ma ◽  
Ping Liu ◽  
Qingzhi Liu ◽  
Zhiwei Chen ◽  
Dan Qu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Type Structure ◽  
Carbon Microspheres ◽  
Facile Synthesis ◽  
Capacity Retention ◽  
High Specific Capacity ◽  
Composite Microspheres

Three-dimensional carbon–NiCoO2 microspheres were prepared. NiCoO2 nanoparticles were inserted into porous carbon microspheres. The composite showed high specific capacity and stable capacity retention.

Fe2O3-Fe3C heterostructure encapsulated into carbon matrix for lithium-ion battery anode

2021 ◽  
Author(s):  
Jihui Zheng ◽  
Fanjun Kong ◽  
Shi Tao ◽  
Bin Qian
Keyword(s):  
Metal Oxides ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
High Specific Capacity ◽  
Battery Anode

In this text, a novel Fe2O3-Fe3C heterostructure encapsulated into carbon matrix is designed as an anode material for lithium-ion batteries. The composite continues the high specific capacity of metal oxides,...

Co0.85Se Particles Encapsulated in the Inner Wall of Nitrogen-Doped Carbon Matrix Nanotube with Rational Interfacial Bonds for High-Performance Lithium-Ion Batteries

2021 ◽  
Author(s):  
Rujia Zou ◽  
Qi Chen ◽  
Shu-Ang He ◽  
Qichen Liang ◽  
Zhe Cui ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Capacity Fade ◽  
High Specific Capacity ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Cobalt Selenide

Cobalt selenide based on conversion reaction have been widely applied in lithium-ion batteries (LIBs) due to its high conductivity and high specific capacity. However, effectively suppressing the fast capacity fade...

scholarly journals Mn-N-C Nanostructure Derived from MnO2-x/PANI as Highly Performing Cathode Additive in Li-S Battery

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 275-286
Author(s):  
Xingyuan Gao ◽  
Ruliang Liu ◽  
Lixia Wu ◽  
Changdi Lai ◽  
Yubin Liang ◽  
...  
Keyword(s):  
Metallic Nanoparticles ◽  
Active Sites ◽  
In Situ Polymerization ◽  
Specific Capacity ◽  
Carbon Matrix ◽  
Rate Performance ◽  
Highly Dispersed ◽  
Good Cycling Stability ◽  
Cathode Additive

Highly dispersed Mn metallic nanoparticles (15.87 nm on average) on a nitrogen-doped porous carbon matrix were prepared by thermal treatment of MnO2-x/polyaniline (PANI), which was derived from the in situ polymerization of aniline monomers initiated by γ-MnO2 nanosheets. Owing to the large surface area (1287 m2/g), abundant active sites, nitrogen dopants and highly dispersed Mn sites on graphitic carbon, an impressive specific capacity of 1319.4 mAh g−1 with an admirable rate performance was delivered in a Li-S battery. After 220 cycles at 1 C, 80.6% of the original capacity was retained, exhibiting a good cycling stability.

Facile synthesis of metal/metal oxide nanoparticles inside a nanoporous carbon matrix (M/MO@C) through the morphology-preserved transformation of metal–organic framework

2015 ◽  
Vol 51 (33) ◽  
pp. 7238-7241 ◽  
Author(s):  
Woojeong Bak ◽  
Hee Soo Kim ◽  
Hyungphil Chun ◽  
Won Cheol Yoo
Keyword(s):  
Metal Oxide ◽  
Metal Organic Framework ◽  
Metal Oxide Nanoparticles ◽  
Metal Organic Frameworks ◽  
Carbon Matrix ◽  
Carbon Composites ◽  
Particle Sizes ◽  
Facile Synthesis ◽  
Metal Metal ◽  
Metal Organic

Metal–organic frameworks (MOFs) undergo a simple, two-step process to form morphology-preserved metal/metal oxide@carbon composites with tunable porosity and particle sizes.

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

Thermal Behaviour of Candesartan Active substance and in pharmaceutical compounds

2017 ◽  
Vol 68 (8) ◽  
pp. 1895-1902
Author(s):  
Ioana Cristina Tita ◽  
Eleonora Marian ◽  
Bogdan Tita ◽  
Claudia Crina Toma ◽  
Laura Vicas
Keyword(s):  
Thermal Behaviour ◽  
Active Substance ◽  
Pharmaceutical Research ◽  
Pharmaceutical Product ◽  
Nitrogen Atmosphere ◽  
Pure Substance ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Ft Ir

Thermal analysis is one of the most frequently used instrumental techniques in the pharmaceutical research, for the thermal characterization of different materials from solids to semi-solids, which are of pharmaceutical relevance. In this paper, simultaneous thermogravimetry/derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC) were used for characterization of the thermal behaviour of candesartan cilexetil � active substance (C-AS) under dynamic nitrogen atmosphere and nonisothermal conditions, in comparison with pharmaceutical product containing the corresponding active substance. It was observed that the commercial samples showed a different thermal profile than the standard sample, caused by the presence of excipients in the pharmaceutical product and to possible interaction of these with the active substance. The Fourier transformed infrared spectroscopy (FT-IR) and X-ray powder diffraction (XRPD) were used as complementary techniques adequately implement and assist in interpretation of the thermal results. The main conclusion of this comparative study was that the TG/DTG and DSC curves, together with the FT-IR spectra, respectively X-ray difractograms constitute believe data for the discrimination between the pure substance and pharmaceutical forms.

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