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Online since: July 2011
Authors: Han Mei Hu, Chong Hai Deng, Ming Di Yang
It was found that the morphology and structure of Cu2O crystals were greatly affected by the concentration of NaOH.
Introduction The architectural control of nano- and microcrystals with well-defined shapes is an important goal of modern materials chemistry because the size and morphology of these materials can be designed according to the requirements of the devices.
Four prominent XRD peaks can be indexed to the Cu2O crystal planes of (110), (111), (200), (220), which give a cubic structure with the measured lattice constants of a= 4.426 Å, consistent with the standard values of the reported Cu2O data (JCPDS card No. 5-667).
The enlarged image of an individual microoctahedron indicates thet there are small protrusive structures existing on its surface.
Introduction The architectural control of nano- and microcrystals with well-defined shapes is an important goal of modern materials chemistry because the size and morphology of these materials can be designed according to the requirements of the devices.
Four prominent XRD peaks can be indexed to the Cu2O crystal planes of (110), (111), (200), (220), which give a cubic structure with the measured lattice constants of a= 4.426 Å, consistent with the standard values of the reported Cu2O data (JCPDS card No. 5-667).
The enlarged image of an individual microoctahedron indicates thet there are small protrusive structures existing on its surface.
Online since: October 2006
Authors: Frank Czerwinski, Anna Zielinska-Lipiec
It was revealed that the
processing created thixotropic morphologies with globular solids of α-Mg, having well-developed
sub-structures.
As described earlier [1], semisolid molding introduces changes to morphology, chemistry and phase type formed within the Mg-Al alloys with additions of alkaline earth metal, strontium.
In addition to lamellae structures observed by SEM, the Sr containing phases also exhibited a dendritic morphology Moreover, much smaller precipitates containing Sr were detected at twin boundaries.
The noticeable differences in the morphology of thixotropic structures between Mg-Al alloys with and without Sr additions were distinguished.
As described earlier [1], semisolid molding introduces changes to morphology, chemistry and phase type formed within the Mg-Al alloys with additions of alkaline earth metal, strontium.
In addition to lamellae structures observed by SEM, the Sr containing phases also exhibited a dendritic morphology Moreover, much smaller precipitates containing Sr were detected at twin boundaries.
The noticeable differences in the morphology of thixotropic structures between Mg-Al alloys with and without Sr additions were distinguished.
Online since: April 2014
Authors: P. Tserotas, E. Statharas, G.S.E. Antipas
FTIR spectra revealed no distinct differences in the bulk structure of the two systems.
Introduction The correlation of properties and structure is important in designing materials for engineering applications [1-6], being crucial in magnetic sensor design and development [7-12].
Hristoforou, Cyclodextrin inclusion complexes as novel MOCVD precursors for potential cobalt oxide deposition, Applied Organometallic Chemistry, 24, p. 112-121, 2010 [16] ND Papadopoulos, E.
Hristoforou, Effects of MOCVD thin cobalt films' structure and surface characteristics on their magnetic behavior, Chemical Vapor Deposition, 17, p. 211-220, 2011
Introduction The correlation of properties and structure is important in designing materials for engineering applications [1-6], being crucial in magnetic sensor design and development [7-12].
Hristoforou, Cyclodextrin inclusion complexes as novel MOCVD precursors for potential cobalt oxide deposition, Applied Organometallic Chemistry, 24, p. 112-121, 2010 [16] ND Papadopoulos, E.
Hristoforou, Effects of MOCVD thin cobalt films' structure and surface characteristics on their magnetic behavior, Chemical Vapor Deposition, 17, p. 211-220, 2011
Online since: May 2011
Authors: Ping Liu, Yang Lu, Jia Chang Zhao, Ji Cheng Feng, Yi Wen Song, Bo He Jin Tang, Jing Li Xu
Ordered mesoporous carbon/cobalt oxide composites as the electrode materials for supercapacitor
Jingli Xu1,a, Ping Liu1, Yang Lu1, Jiachang Zhao1, Jicheng Feng1, Yiwen Song1 and Bohejin Tang1
1College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 201620, Shanghai, China
aE-mail address: xujingli@sues.edu.cn
Keywords: Supercapacitor; composite; cobalt oxide; electrochemical property
Abstract: A series of ordered mesoporous carbon/cobalt oxide composites as electrode materials for supercapacitor were prepared via incipient wetness impregnation method.
The results show that the structure and electrochemical properties of the composites depend mainly on the cobalt oxide loading amount in the ordered mesoporous carbon.
The effect of CoOx loading amount on the structure and the electrochemical properties of the composites were investigated.
The structures of the prepared materials were analyzed by X-ray diffractometer (D/Max-rB ).
The results show that the structure and electrochemical properties of the composites depend mainly on the cobalt oxide loading amount in the ordered mesoporous carbon.
The effect of CoOx loading amount on the structure and the electrochemical properties of the composites were investigated.
The structures of the prepared materials were analyzed by X-ray diffractometer (D/Max-rB ).
Online since: March 2016
Authors: Rusdi Roshidah, Kelimah Elong, Norlida Kamarulzaman
Ti Doped LiMn1/3Co1/3Ni1/3O2 for Li-ion Battery Application
KELIMAH Elong1,3,a, NORLIDA Kamarulzaman1,2,b* and ROSHIDAH Rusdi1,c
1Centre for Nanomaterials Research, Institute of Science, Level 3 Block C (Old Engineering Building), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
2School of Physics and Materials Studies, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
3School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
akelimah0907@salam.uitm.edu.my, bnorlyk@salam.uitm.edu.my, croshidahrusdi@yahoo.com
Keywords: Cathode, capacity fading, Li-ion battery, X-Ray diffraction
Abstract.
The structure and morphology of the materials were characterized using X-Ray powder diffraction (XRPD) and Field Emission Scanning Electron Microscopy (FESEM).
XRD results showed that the materials are impurity-free and single phase with well ordered hexaganol structure of Rm space group.
This means that the Ti+ ions have been successfully substituted in the LiMn1/3Co1/3Ni1/3O2 structure.
All the diffraction peaks can be indexed with α –NaFeO2 type structure based on the hexagonal crystal system (Rm space group).
The structure and morphology of the materials were characterized using X-Ray powder diffraction (XRPD) and Field Emission Scanning Electron Microscopy (FESEM).
XRD results showed that the materials are impurity-free and single phase with well ordered hexaganol structure of Rm space group.
This means that the Ti+ ions have been successfully substituted in the LiMn1/3Co1/3Ni1/3O2 structure.
All the diffraction peaks can be indexed with α –NaFeO2 type structure based on the hexagonal crystal system (Rm space group).
Online since: April 2010
Authors: C.Y. Wang, J.L. Li, W. Wang, F.X. Kong, S.E. Hao
BaTiO3 powders modified with Sm, La, Cu, Al, Zn were prepared by solid doping and gaseous
penetration method and their components, structure, superficies and electric properties were
characterized.
Because of the porous structure of the ceramics, Hao cites the gaseous penetration of rare earth method into the modification of the preparation of conductive powders, carving out a new way to the preparation of functional ceramics [13~17].
The doping process only leads to the changes of the peak width and intensity without new phases appearing, the main phase is still perovskite structure.
It can be concluded that the doping process did not change the perovskite structure of the powders, and Sm entered the crystal lattice of BaTiO3 ceramics.
Rane, et al.: Materials Chemistry and Physics.
Because of the porous structure of the ceramics, Hao cites the gaseous penetration of rare earth method into the modification of the preparation of conductive powders, carving out a new way to the preparation of functional ceramics [13~17].
The doping process only leads to the changes of the peak width and intensity without new phases appearing, the main phase is still perovskite structure.
It can be concluded that the doping process did not change the perovskite structure of the powders, and Sm entered the crystal lattice of BaTiO3 ceramics.
Rane, et al.: Materials Chemistry and Physics.
Online since: April 2024
Authors: K. Jagadeeswaraiah, M. Malyaadri
Jagadeeswaraiah2,b*
1Department of Chemistry, SRR and CVR Government Degree College (A), Vijayawada, Andhra Pradesh, India-520004.
2Department of Chemistry, Government Degree College for Women, Wanaparthy,
T.S.
Its structure, with a hydroxyl group and a 2-oxo-1,3-dioxolane group, makes it highly reactive, easily converting to epichlorohydrin under mild conditions, enabling various industrial applications.
From the above observations, it can be concluded that the nanotubular structure of the catalysts is retained, which might be responsible for repeated use.
Furthermore, NaTNT contains highly active OH- groups within its interlayer structure.
Dong et al., Ordered mesoporous BaCO3/C-catalyzed synthesis of glycerol carbonate from glycerol and dimethyl carbonate, Science China Chemistry 58 (2015) 708-715
Its structure, with a hydroxyl group and a 2-oxo-1,3-dioxolane group, makes it highly reactive, easily converting to epichlorohydrin under mild conditions, enabling various industrial applications.
From the above observations, it can be concluded that the nanotubular structure of the catalysts is retained, which might be responsible for repeated use.
Furthermore, NaTNT contains highly active OH- groups within its interlayer structure.
Dong et al., Ordered mesoporous BaCO3/C-catalyzed synthesis of glycerol carbonate from glycerol and dimethyl carbonate, Science China Chemistry 58 (2015) 708-715
Online since: March 2025
Authors: Yunita Triana, Muthia Putri Darsini Lubis, Hizkia Alpha Dewanto, Muhammad Rifani, Fredy Kurniawan, Daffa Irsyad Darmawan, Yusairie Mohd
Based on the molecular structure of the flavonoids detected in this assay suggest their potential effectiveness in the corrosion inhibiton process through antioxidant activity and adsorption onto metal surface.
Fig. 3 Structure of Flavonoid Secondary metabolite compounds, namely tannins, contain functional groups such as O-H and C-O single bonds which contribute to their chemical properties.
Portioli, “Modeling of metal structure corrosion damage: A state of the art report,” Sustainability, vol. 2, no. 7, pp. 2163–2175, 2010, doi: 10.3390/su2072163
Raeissi, “The inhibition of carbon steel corrosion in hydrochloric and sulfuric acid media using some benzimidazole derivatives,” Materials Chemistry and Physics, vol. 121, no. 1–2, pp. 320–325, May 2010, doi: 10.1016/j.matchemphys.2010.01.040
Abdelkader, “Paprika extract: a green inhibitor for mitigating carbon steel disintegration in 1 M HCl pickling solution,” Green Chemistry Letters and Reviews, vol. 14, no. 4.
Fig. 3 Structure of Flavonoid Secondary metabolite compounds, namely tannins, contain functional groups such as O-H and C-O single bonds which contribute to their chemical properties.
Portioli, “Modeling of metal structure corrosion damage: A state of the art report,” Sustainability, vol. 2, no. 7, pp. 2163–2175, 2010, doi: 10.3390/su2072163
Raeissi, “The inhibition of carbon steel corrosion in hydrochloric and sulfuric acid media using some benzimidazole derivatives,” Materials Chemistry and Physics, vol. 121, no. 1–2, pp. 320–325, May 2010, doi: 10.1016/j.matchemphys.2010.01.040
Abdelkader, “Paprika extract: a green inhibitor for mitigating carbon steel disintegration in 1 M HCl pickling solution,” Green Chemistry Letters and Reviews, vol. 14, no. 4.
Online since: February 2026
Authors: Svitlana Hryhorenko, Liubov Yeremeieva, Olga Kushnarova, Yevhenii Titkov, Valery Kostin, Olena M. Berdnikova
The internal structure of the grains is smaller compared to alloy #1.
Structure and properties of cast Ti‒Fe alloys.
Composition, structure, properties: Handbook, Moscow, VILS - MATI, 2009
Sources, compositions, properties, metal chemistry and applications, Moscow, Nauka, 1975
Effect of Structure on the Properties of Composite Cr3C2 + NiCr Coatings.
Structure and properties of cast Ti‒Fe alloys.
Composition, structure, properties: Handbook, Moscow, VILS - MATI, 2009
Sources, compositions, properties, metal chemistry and applications, Moscow, Nauka, 1975
Effect of Structure on the Properties of Composite Cr3C2 + NiCr Coatings.
Online since: January 2018
Authors: Andrey V. Nomoev, Svetlana L. Gafner, Sergey P. Bardakhanov, Yuri Ya Gafner
Analysis of the Structure and Thermal Stability of Cu@Si Nanoparticles
Yuri Ya.
However, technical application of clusters imposes high requirements on the size of particles, their outward appearance, inner structure and the degree of defect structure.
Yang, Voltage-controlled synthesis of Cu–Li2O@Si core–shell nanorod arrays as high-performance anodes for lithium-ion batteries, Journal of Materials Chemistry A 2 (2014) 20510-20514
Marks, Experimental studies of small particle structures, J.
Artacho, Metallic bonding and cluster structure, J.
However, technical application of clusters imposes high requirements on the size of particles, their outward appearance, inner structure and the degree of defect structure.
Yang, Voltage-controlled synthesis of Cu–Li2O@Si core–shell nanorod arrays as high-performance anodes for lithium-ion batteries, Journal of Materials Chemistry A 2 (2014) 20510-20514
Marks, Experimental studies of small particle structures, J.
Artacho, Metallic bonding and cluster structure, J.