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Online since: June 2013
Authors: Hui Shao, Gang Jian, Qing Xian Hu, Sheng Lu
Mean particle size of ~16.5 nm CoFe2O4 primary particles synthesized by coprecipitation showed non-oriented structure.
Particles with tabular structure exhibit better properties such as dispersing and microwave absorption capabilities.
Magnetic materials’ properties such as magnetostrictive can be also enhanced by forming textured structures [17].
The dried reaction products were calcinated to obtain CoFe2O4 crystals with final structure.
Duan, Chinese journal of inorganic chemistry. 6 (11) (2001) 830−834
Particles with tabular structure exhibit better properties such as dispersing and microwave absorption capabilities.
Magnetic materials’ properties such as magnetostrictive can be also enhanced by forming textured structures [17].
The dried reaction products were calcinated to obtain CoFe2O4 crystals with final structure.
Duan, Chinese journal of inorganic chemistry. 6 (11) (2001) 830−834
Online since: September 2017
Authors: E.R. Zvereva, O.S. Zueva, R.V. Khabibullina
The reduction in viscosity was observed even at low shear rates, which indicates the absence of extensive spatial structure in the oil heterogeneous system.
The size and structure of the diproksamin molecule is somewhat similar to nanoparticles [25].
The reduction in viscosity was observed even at low shear rates, which indicates the absence of extensive spatial structure in the oil heterogeneous system.
Akhmetvalieva, Improvement in the Viscosity Characteristics of Boiler Oil by Additives, Petroleum Chemistry, 56 (2016) 65-67
Zuev, Structure and properties of aqueous dispersions of sodium dodecyl sulfate with carbon nanotubes, Russ.
The size and structure of the diproksamin molecule is somewhat similar to nanoparticles [25].
The reduction in viscosity was observed even at low shear rates, which indicates the absence of extensive spatial structure in the oil heterogeneous system.
Akhmetvalieva, Improvement in the Viscosity Characteristics of Boiler Oil by Additives, Petroleum Chemistry, 56 (2016) 65-67
Zuev, Structure and properties of aqueous dispersions of sodium dodecyl sulfate with carbon nanotubes, Russ.
Online since: January 2012
Authors: Xia Xu, Hao Ding, Yue Bo Wang, Yu Liang, Wei Jiang
The structure of sericite is stable, and it is hard to prepare polymer layered silicate nanocomposites (PLSN).
The organic-inorganic composite which use the nano layered silicate minerals to fill in the polymer, are getting more and more attention and researches, since the development of intercalation chemistry of the resourceful layered silicates [2].
The crystal structure of sericite samples remained after modification with sodium fluorosilicate, but the degree of crystallinity decreased compared with raw materials.
And the degree of crystallinity was similar or more completed than that of thermal-treated sericite which could be judged from the changes of crystal structure and the dissolving-out amount of Al3+ and the change of sericite structure by modification with sodium fluorosilicate.
Poncelet: Preparation and characterization of microporous 18 angstrom Al-pillared structures from natural phlogopite micas, Micropor.
The organic-inorganic composite which use the nano layered silicate minerals to fill in the polymer, are getting more and more attention and researches, since the development of intercalation chemistry of the resourceful layered silicates [2].
The crystal structure of sericite samples remained after modification with sodium fluorosilicate, but the degree of crystallinity decreased compared with raw materials.
And the degree of crystallinity was similar or more completed than that of thermal-treated sericite which could be judged from the changes of crystal structure and the dissolving-out amount of Al3+ and the change of sericite structure by modification with sodium fluorosilicate.
Poncelet: Preparation and characterization of microporous 18 angstrom Al-pillared structures from natural phlogopite micas, Micropor.
Online since: May 2020
Authors: E.N. Kuzmichev, Pavel G. Chigrin, S.V. Nikolenko
This makes a possibility to synthesize a high-quality alloy with an ordered structure of the carbide phase during refinement and pressing.
The carbide phase ordered structure contributed to an increase in the strength characteristics of the new refractory material.
The structure of the synthesized alloy is skeletal, since there is a solid tungsten skeleton intertwined with tungsten carbide.
As for the WxCW alloy, the carbide phase constructing structure is smoother and monolithic.
Samokhin, Plasmic nanopowder metallurgy, In: 5th international conference-school on chemical technology abstracts collection of satellite conference reports of the XX Mendeleev Congress on General and Applied Chemistry. (2016) 32-34
The carbide phase ordered structure contributed to an increase in the strength characteristics of the new refractory material.
The structure of the synthesized alloy is skeletal, since there is a solid tungsten skeleton intertwined with tungsten carbide.
As for the WxCW alloy, the carbide phase constructing structure is smoother and monolithic.
Samokhin, Plasmic nanopowder metallurgy, In: 5th international conference-school on chemical technology abstracts collection of satellite conference reports of the XX Mendeleev Congress on General and Applied Chemistry. (2016) 32-34
Online since: January 2007
Authors: Sang Eon Park, Kwang Min Choi, David Raju Burri, Sang Cheol Han
Microwave Synthesis and Characterization of stacked AlTS-1
Kwang-Min Choi, David Raju Burri, Sang-Cheol Han, Sang-Eon Park
*
Lab. of Nano-Green Catalysis and Nano Center for Fine Chemicals Fusion Technology, Dep't of
Chemistry, Inha University, Incheon 402-751 , Korea
e-mail: separk@inha.ac.kr
Key words: Nano-stacked Al-TS-1; Al-TS-1; Microwave synthesis; Al-Solid NMR; NH3-TPD; MFI
zeolite
Abstract.
Consequently, AlTS-1 with MFI structure has materialized as one of the worth noting examples of the TS-1 family, wherein, aluminum created acidic nature and titanium imparted the redox behavior.
The XRD reflections at 24.4 o of the spectra obtained from both the materials demonstrated the orthorhombic MFI structure [14].
The symmetry of NS-AlTS-1 gradually changes to orthorthombic structure with the framework titanium [18, 19].
Conclusions MFI structured NS-AlTS-1 microporous material was successfully synthesized using a novel microwave technique, which is rapid, energy-saving and time-saving process.
Consequently, AlTS-1 with MFI structure has materialized as one of the worth noting examples of the TS-1 family, wherein, aluminum created acidic nature and titanium imparted the redox behavior.
The XRD reflections at 24.4 o of the spectra obtained from both the materials demonstrated the orthorhombic MFI structure [14].
The symmetry of NS-AlTS-1 gradually changes to orthorthombic structure with the framework titanium [18, 19].
Conclusions MFI structured NS-AlTS-1 microporous material was successfully synthesized using a novel microwave technique, which is rapid, energy-saving and time-saving process.
Modification of Used Palm Oil: Preliminary Study of its Potentiality as Polyurethane Foam Precursors
Online since: August 2016
Authors: Duangporn Riyapan, Nitinart Saetung, Anuwat Saetung
The chemical structure of modified used palm oil (MUPO) or polyol was confirmed by 1H-NMR.
The chemical structures of MUPO were analyzed by 1H NMR spectroscopy (500MHz).
The cell structure was confirmed by SEM in Fig.2 with enlargements of 30 times.
Chemical structure of all polyols was confirmed by 1H-NMR.
Choe,D.B.Min, Chemistry of deep-fat frying oils, J.
The chemical structures of MUPO were analyzed by 1H NMR spectroscopy (500MHz).
The cell structure was confirmed by SEM in Fig.2 with enlargements of 30 times.
Chemical structure of all polyols was confirmed by 1H-NMR.
Choe,D.B.Min, Chemistry of deep-fat frying oils, J.
Online since: January 2013
Authors: Ke Duan Zhi, Quan Sheng Liu, Run Xia He, Fang Wu, Ya Gang Zhang, Li Yang
The the ration of Cu to Mn is also a very important parameter to affect the structure and WGSR behavior of the Cu-Mn catalysts [10-16].
The BET and XRD measurements of the samples collected during precipitation, after drying, and before and after the WGS reaction were conducted to investigate how the ration of Cu to Mn affect the structure, activity and stability of the catalysts.
Apparently, This result indicates that the Cu-Mn based catalyst while the ration of Cu to Mn is 1:1 shows strong physical structure, whereas other samples has weaker structure.
It is interesting that the all dried samples were transferred to the spinel structured Cu1.5Mn1.5O4(JCPDS 70-0260) , Cu2+1O , Mn3O4 and CuOafter calcining at 550℃ (Fig.2-b) no matter what the ration of Cu to Mn were used.
Conclusions The ratio of Cu to Mn are important parameters to affect phase structure and texture of the Cu-Mn based WGS catalyst, especially catalytic performance at low temperature from 200℃ to 300℃.
The BET and XRD measurements of the samples collected during precipitation, after drying, and before and after the WGS reaction were conducted to investigate how the ration of Cu to Mn affect the structure, activity and stability of the catalysts.
Apparently, This result indicates that the Cu-Mn based catalyst while the ration of Cu to Mn is 1:1 shows strong physical structure, whereas other samples has weaker structure.
It is interesting that the all dried samples were transferred to the spinel structured Cu1.5Mn1.5O4(JCPDS 70-0260) , Cu2+1O , Mn3O4 and CuOafter calcining at 550℃ (Fig.2-b) no matter what the ration of Cu to Mn were used.
Conclusions The ratio of Cu to Mn are important parameters to affect phase structure and texture of the Cu-Mn based WGS catalyst, especially catalytic performance at low temperature from 200℃ to 300℃.
Online since: December 2014
Authors: Jian Feng Huang, Xiu Juan He, Li Yun Cao, Xin Gang Kong, Jian Peng Wu
One belongs to the monoclinic wolframite structure when the radius of cation ion is smaller than 0.77Å while the other is prior to generate tetragonal scheelite structure under the circumstance of larger cation radius than 0.99Å.
Their micro structure maintains complete.
This series of polyoxotungstate structure is based on the [WO6] octahedral structure by sharing in vertexes and adjacent edges to form polystructure.
In Fig.1 the crystal structure is much affected by the pH values of precursors.
College Chemistry, 2008, Vol 23, No.3 :59-63.
Their micro structure maintains complete.
This series of polyoxotungstate structure is based on the [WO6] octahedral structure by sharing in vertexes and adjacent edges to form polystructure.
In Fig.1 the crystal structure is much affected by the pH values of precursors.
College Chemistry, 2008, Vol 23, No.3 :59-63.
Online since: October 2011
Authors: Wei Hua Chen, Jian Min Zhang
A New Composite Electrocatalyst, TiO2/AC, for Oxygen Reduction in Zinc-Air Battery
Jianmin Zhanga, Weihua Chenb
Department of Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
azhjm@zzu.edu.cn, bchenweih@zzu.edu.cn
Keywords: TiO2/AC powders, electrocatalyst, air electrode, oxygen reduction
Abstract.
Results and Discussion Examination and analysis of structure.
These patterns indicate that the AC in the TiO2/AC composite catalyst has no influence on the crystal type or structure of the TiO2.
The reason for this may be that although TiO2 was calcined in the TiO2/AC composite, AC was not embedded in the crystal structure of TiO2.
The mechanical pressure could make the electrode material adopt a much more tightly packed structure with very limited void spaces.
Results and Discussion Examination and analysis of structure.
These patterns indicate that the AC in the TiO2/AC composite catalyst has no influence on the crystal type or structure of the TiO2.
The reason for this may be that although TiO2 was calcined in the TiO2/AC composite, AC was not embedded in the crystal structure of TiO2.
The mechanical pressure could make the electrode material adopt a much more tightly packed structure with very limited void spaces.
Online since: March 2009
Authors: Erik Janzén, Rebecca Cheung, Anne Henry, Enrico Mastropaolo
The
crystal structure of the films have been accessed with X-ray diffraction.
However, even if in the past decade significant progress has been made in the processing of SiC structures, the growth and the etching technologies are still under study to improve the reliability of SiC MEMS.
Fig.1.c shows high amplification image of the surface morphology of the polycrystal; no particular pattern or structure is observed.
Finally, a CF4/H2 plasma has been used to remove any potential residual of SiO2 on top of the fabricated structures.
Fig. 4 shows some of the fabricated structures.
However, even if in the past decade significant progress has been made in the processing of SiC structures, the growth and the etching technologies are still under study to improve the reliability of SiC MEMS.
Fig.1.c shows high amplification image of the surface morphology of the polycrystal; no particular pattern or structure is observed.
Finally, a CF4/H2 plasma has been used to remove any potential residual of SiO2 on top of the fabricated structures.
Fig. 4 shows some of the fabricated structures.