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Online since: July 2013
Authors: Xiao Jian Hao, Hui Zhong Hu, Bao Wu Pan
Hydrothermal Synthesis of LiMnO2 with Orthorhombic Structure as Cathode Materials
Hu Huizhong, Pan Baowu*, Hao Xiaojian
Department of Material Science and Engineering, North University of China, Taiyuan, China, 030051
Keywords: Lithium-ion batteries; Orthorhombic LiMnO2; Hydrothermal method; Li+/Mn3+ ratios
Abstract: o-LiMnO2 was successfully synthesized by the hydrothermal method at Li+/Mn3+=4:1.
Zhang: Chinese Journal of Inorganic Chemistry. 21(2005), 261-264
Zhang: Chinese Journal of Inorganic Chemistry. 21(2005), 261-264
Online since: August 2012
Authors: Xian Quan Hu, Guang Luo, Guang Yu Xiao, Chun Yang Kong
In the following part, electronic structure will be discussed in detail.
Generally speaking, the structure of those hydrated ions is very complex.
Analysis of Electronic Structure of Hydrated Ions Calculation method.
Our group having used the quantum chemistry program according the density functional theory (DFT) which is promoted by Hohenberg and Kohn[12,13,14] has obtained the electronic structure of hydrated ions.
Through optimizing the hydrated ions geometry structure, the relative parameters of electronic structure for hydrated ions can be calculated easily.
Generally speaking, the structure of those hydrated ions is very complex.
Analysis of Electronic Structure of Hydrated Ions Calculation method.
Our group having used the quantum chemistry program according the density functional theory (DFT) which is promoted by Hohenberg and Kohn[12,13,14] has obtained the electronic structure of hydrated ions.
Through optimizing the hydrated ions geometry structure, the relative parameters of electronic structure for hydrated ions can be calculated easily.
Online since: May 2021
Authors: A.K. Kairakbaev, E. S. Abdrakhimova, V.Z. Abdrakhimov
Creating waste-free technologies for the production of materials with high physical and thermal properties for the lining structures of thermal units is among the important environmental issues.
Sudaks, due to a very active reaction of calcium oxide with phosphoric acid, the formation of a hardening structure here is impossible [16].
Due to a very active reaction of calcium oxide with phosphoric acid, the formation of a hardening structure here is impossible, and iron oxide reduces the rate of reactions. 6.
Abdrakhimova, Porosity Structure and Technical Properties of Clinker Materials based on Non-Ferrous Metallurgy waste in Eastern Kazakhstan Glass and Ceramics 1-5 (2020)
Sudaks, Chemical fundamentals of technology and application of phosphate binders and coatings (L .: Chemistry). (1969) 189 p
Sudaks, due to a very active reaction of calcium oxide with phosphoric acid, the formation of a hardening structure here is impossible [16].
Due to a very active reaction of calcium oxide with phosphoric acid, the formation of a hardening structure here is impossible, and iron oxide reduces the rate of reactions. 6.
Abdrakhimova, Porosity Structure and Technical Properties of Clinker Materials based on Non-Ferrous Metallurgy waste in Eastern Kazakhstan Glass and Ceramics 1-5 (2020)
Sudaks, Chemical fundamentals of technology and application of phosphate binders and coatings (L .: Chemistry). (1969) 189 p
Online since: October 2012
Authors: Nofrijon Sofyan, A.H. Yuwono, S. Harjanto, D. Daneswara, A. Ferdiansyah, H. Dharma, O. Hammerstein
One-Dimensional ZnO Nanostructures by Wet-Chemistry
Technique for Dye Sensitized Solar Cell Application
A.H.
With 2 days seeding time, the structure of ZnO phase was dispersed uniformly over the surface of ITO and existed as short nanorods in horizontal position (Fig. 5a).
It can be seen that there also existed small branch nanorods growing out from these individual large rod-like structures.
This can be understood since these bigger nanorods have many small branch nanorods growing out from these individual large rod-like structures (Fig. 5c).
This caused the whole structure became denser, resulting in difficulty for the dye solution to penetrateto pore structure in reaching the surface of semiconductor oxide.
With 2 days seeding time, the structure of ZnO phase was dispersed uniformly over the surface of ITO and existed as short nanorods in horizontal position (Fig. 5a).
It can be seen that there also existed small branch nanorods growing out from these individual large rod-like structures.
This can be understood since these bigger nanorods have many small branch nanorods growing out from these individual large rod-like structures (Fig. 5c).
This caused the whole structure became denser, resulting in difficulty for the dye solution to penetrateto pore structure in reaching the surface of semiconductor oxide.
Online since: September 2017
Authors: Andrey Vishnevsky, Fedor L. Kapustin
The introduction of gypsum ensures the creation of a uniform homogeneous structure, resulting in the increased strength properties and reduced drying shrinkage.
The resulting aerated concrete has thermal conductivity of 0.075-0.100 W/m·K, it allows using and creating single-layer fencing structures without additional insulation.
Introduction At present autoclaved aerated concrete (AAC) is widely used in the construction of buildings and structures for various purposes.
The analysis of the resulting AAC showed that samples with the density of 300 and 400 kg/m3 has a homogeneous structure without visible damage (Fig. 1).
Cement chemistry.
The resulting aerated concrete has thermal conductivity of 0.075-0.100 W/m·K, it allows using and creating single-layer fencing structures without additional insulation.
Introduction At present autoclaved aerated concrete (AAC) is widely used in the construction of buildings and structures for various purposes.
The analysis of the resulting AAC showed that samples with the density of 300 and 400 kg/m3 has a homogeneous structure without visible damage (Fig. 1).
Cement chemistry.
Online since: December 2012
Authors: M. Bnhussain, Che Mohd Ruzaidi Ghazali, Mohd Mustafa Al Bakri Abdullah, C.Y. Heah, Kamarudin Hussin, Y.M. Liew, Luqman Musa, Khairul Nizar Ismail
Layered kaolin structure only allows very little, if any, substitution of other elements.
The SEM micrograph showed that the mechanically-activated kaolin geopolymers have denser structure which complies with the compressive strength measured.
Mechanical activation can break the kaolinite structure without altering overall chemistry of the materials [7] and results in the formation of some spherical particle shape [8] since raw materials kaolin has low reactivity due to its plate-like structure.
Plate-like structure and needle-like phase of raw kaolin reduced after the mechanical activation.
Changes in microstructure has occurred where structure of geopolymers become compact and denser with increasing duration of mechanical activation.
The SEM micrograph showed that the mechanically-activated kaolin geopolymers have denser structure which complies with the compressive strength measured.
Mechanical activation can break the kaolinite structure without altering overall chemistry of the materials [7] and results in the formation of some spherical particle shape [8] since raw materials kaolin has low reactivity due to its plate-like structure.
Plate-like structure and needle-like phase of raw kaolin reduced after the mechanical activation.
Changes in microstructure has occurred where structure of geopolymers become compact and denser with increasing duration of mechanical activation.
Online since: December 2013
Authors: Zhuo Chen, Yang Yuan, Hao Li Qin, Zhao Wu Han
The New Technology of Preparation Activated Carbon from Lignite
Yuan Yang1,a Zhuo Chen1,b Hao-Li Qin1,c Zhao-Wu Han2,d
1School of Chemistry and Materials Science, Guizhou Normal University, Guizhou Guiyang, China, 550001
2Guizhou Yong Jin Chemical Technology Co., Ltd, Guizhou Puding, China, 562100
ayang1yuan2@126.com bchenzhuo@163.com chollyqin@126.com dwwghh@163.com
Key words: activated carbon; lignite; acidification; catalysis
Abstract: The lignite resource is rich in Xilingol League in Inner Mongolia.
Introduction Activated carbon is a kind of porous carbon product with amorphous carbon and different ash, which has the advantages of strong adsorption, large surface area, developed pore structure, variety of surface functional groups, chemical stability and regeneration.
The lignite in low or high volatile is selected according to the pore structure of activated carbon and the requirement of adsorption [5, 10-11].
Nowacki, et al., Relationship between reflectance and structure of high surface areas carbons.
Yi, The production and the development trend of activated carbon, Fujian Chemistry and Industry, (2004) 65-67
Introduction Activated carbon is a kind of porous carbon product with amorphous carbon and different ash, which has the advantages of strong adsorption, large surface area, developed pore structure, variety of surface functional groups, chemical stability and regeneration.
The lignite in low or high volatile is selected according to the pore structure of activated carbon and the requirement of adsorption [5, 10-11].
Nowacki, et al., Relationship between reflectance and structure of high surface areas carbons.
Yi, The production and the development trend of activated carbon, Fujian Chemistry and Industry, (2004) 65-67
Online since: February 2013
Authors: Alexander A. Karpenko, Vitaly I. Saldin
I.2,b
1 A.V.Zhirmunsky Institute of Marine Biology, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia.
2 Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia
email: aalex_karp@list.ru, bsald@ich.dvo.ru
Keywords: Graphite oxide, Reduced graphite oxide, Optical properties, Intercalated compounds,
Abstract.
These are inclusion compounds with the layered graphite_like structure of GO acting as a host and ammonium dodecahydro -closo- dodecaborate (NH4)2В12Н12 as a guest.
The GO host matrix has appropriate sizes for guest accommodation and contains oxygen containing donor groups in its structure, while the anion is electron deficient [11–13].
The cations occupy the voids of the layered structure of ICGO.
Brauer (Eds.), Handbook of Preparative Inorganic Chemistry, Academic, New York, 1965, Мir, Moscow, 1985, pp. 671- 672
These are inclusion compounds with the layered graphite_like structure of GO acting as a host and ammonium dodecahydro -closo- dodecaborate (NH4)2В12Н12 as a guest.
The GO host matrix has appropriate sizes for guest accommodation and contains oxygen containing donor groups in its structure, while the anion is electron deficient [11–13].
The cations occupy the voids of the layered structure of ICGO.
Brauer (Eds.), Handbook of Preparative Inorganic Chemistry, Academic, New York, 1965, Мir, Moscow, 1985, pp. 671- 672
Online since: August 2017
Authors: S. Gokul Raj, Jasper Goldwin, K. Aravindhan, V.P. Senthil, G. Ramesh Kumar
Introduction
Garnets (RE3Fe5O12) crystallize in orthorhombic crystal structure in which trivalent cation is surrounded by six oxygen ions.
The method consists of reacting Y2O3 and Fe2O3 oxides together are as follows. 3Y2O3 + 5Fe2O 3 ® 2 Y3Fe5O 12 (YIG) (1) This transformation results in the appearance of an intermediate compound with a perovskite structure and chemical formula YFeO3 (Yttrium iron oxide – orthoferrite phase).
Gilleo, (1957), The crystal structure and ferrimagnetism of yttrium-rion garnet, Y,Fe, (FeO,) 3, J.
Geller, Crystal chemistry of the garnets, Zeitschrift fUr Kristallographie, Bd. 125 (1967) 1-47 [4] R.D.
[17] Kenzo Kitayama, Masanori Sakaguchi, Youhei Takahara, Hiroyuki Endo, and Hirofumi Ueki, Phase equilibrium in the system Y–Fe–O at 1100o C, Journal of Solid State Chemistry 177 (2004) 1933–1938 [18] N.
The method consists of reacting Y2O3 and Fe2O3 oxides together are as follows. 3Y2O3 + 5Fe2O 3 ® 2 Y3Fe5O 12 (YIG) (1) This transformation results in the appearance of an intermediate compound with a perovskite structure and chemical formula YFeO3 (Yttrium iron oxide – orthoferrite phase).
Gilleo, (1957), The crystal structure and ferrimagnetism of yttrium-rion garnet, Y,Fe, (FeO,) 3, J.
Geller, Crystal chemistry of the garnets, Zeitschrift fUr Kristallographie, Bd. 125 (1967) 1-47 [4] R.D.
[17] Kenzo Kitayama, Masanori Sakaguchi, Youhei Takahara, Hiroyuki Endo, and Hirofumi Ueki, Phase equilibrium in the system Y–Fe–O at 1100o C, Journal of Solid State Chemistry 177 (2004) 1933–1938 [18] N.
Online since: July 2020
Authors: Azwani Sofia Ahmad Khiar, M.S.M. Misenan
In general, the structure of MC are polysaccharides made up from a linear chains backbone of (1-4) glucosidic units of methyl group (-CH3) substituents.
Analysis of FT-IR spectra was done to gain the to identify the functional groups and predicted the chemical structure in CS/MC blend polymer and BMIMTFSI.
Progress In Solid State Chemistry. 17(3):145-261. https://doi.org/10.1016/0079-6786(87)90003-3
Computational insights into the molecular interaction and ion-pair structures of a novel zinc-functionalized ionic liquid, [Emim][Zn(TFSI)3].
Journal of Physical Chemistry B.
Analysis of FT-IR spectra was done to gain the to identify the functional groups and predicted the chemical structure in CS/MC blend polymer and BMIMTFSI.
Progress In Solid State Chemistry. 17(3):145-261. https://doi.org/10.1016/0079-6786(87)90003-3
Computational insights into the molecular interaction and ion-pair structures of a novel zinc-functionalized ionic liquid, [Emim][Zn(TFSI)3].
Journal of Physical Chemistry B.