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Online since: May 2012
Authors: Hong Zhu Ma, Chun Guang Pan
Desulfurization of Simulated Coking Benzene on Modified Activated Clay Chunguang Pan, Hongzhu Ma* Institute of Energy Chemistry, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China, 710062 E-mail address: hzmachem@snnu.edu.cn (H.
Other techniques such as X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and energy dispersive X-ray spectroscopy (EDXS) were also employed to characterize the structure of catalysts.
Several techniques, such as X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDXS), temperature programmed desorption of ammonia (NH3-TPD), and Brunauer-Emmett- Teller (BET), were used to characterize the structure of the catalyst.
NH3-TPD patterns of SAC and SFAC catalysts Characterization of Pore Structure of Catalyst.
Online since: March 2009
Authors: Krzysztof Koziol, Noorhana Yahya, Mohd Kamarulzaman Bin Mansor
The X-ray diffraction pattern reveals the cubic structure of YIG and BIG samples at 7000C and 5000C respectively.
The electron diffraction pattern attached to FESEM image indicates the single crystal structure achieved due sol gel soft chemistry route taken in this work.
Conclusion XRD and TEM results show that the samples have single phase and single crystal garnet structure while the crystallization occurs at 700o C and 500o C for YIG and BIG samples respectively.
This lower crystallization temperature and short sintering time (2 hours) could be related to the good homogeneity of the gel preparation via the soft chemistry route taken in this work.
Online since: May 2011
Authors: Quan An Li, Ke Jie Li
The HRTEM image indicated that the β' precipitate has long-period ordered structure (seen in Fig.3).
At about 473K, the Gd will dissolve up to 3.8 wt. % and squeezing into the Mg structure, and generate stresses.
At the same time, the HRTEM images showed that the β' precipitate has long-period ordered structure (LPS) (seen in Fig. 3) which can effectively improve the mechanical properties of alloy at ambient and elevated temperatures.
The remarkable high strength of experimental alloy was mainly associated with solution strengthen of RE and precipitation strengthening of dispersive LPO structure β' and stable Mg5Gd precipitates in Mg matrix.
[8] Zhang Qinglian: Inorganic Chemistry Volume. 7 (Science press, Beijing 1984)
Online since: May 2016
Authors: Jian Zhao, Xue Wu Hong, Xiao Qian Qi, Qing Sen Xie
The stress-strain behavior of the Hooke hinge is analyzed using finite element method, and the reliability and stability of the structure is evaluated, which provides some theoretical guidance for the design of Hooke hinge.
Introduction With the fast development of technology globally, industrial robust has become one of the most characteristic mechanically and electrically integrated equipment due to its high speed, accuracy and capacity, and thus widely used in many different areas such as aerospace, mechanics, automobile, chemistry, and manufacturing [1].
Online since: February 2013
Authors: Hai Dou Wang, En Zhong Li, Wei Ling Guo
Ag/AgCl) was triggered by reactive oxygen species (HO2•- or OH•-) on an in situ electrodeposited MnO2 nano-structured electrode.
Owing to special structure, novel chemical and physical property, good environmental compatibility of MnO2 nano-materials and their composites, they are one of the most promising cathodic materials and also used for catalyzing electrochemical deoxidizing reactions of O2[1,2].
Ru(bpy)32+ is one of the most attractive ECL reagents in the fundamental studies and commercial applications due to its strong luminescence, good solubility in aqueous solvents, high stability of chemistry, electrochemistry and photochemistry and fast electron-transfer reaction at easily attainable potential[3-6].
The ITO electrode covered with MnO2 nano-structure was fabricated in a conventional three-electrode cell, consisting of ITO as the working electrode, a Pt foil as the counter electrode, and a Ag/AgCl as the reference electrode by controlled-potential electrolyzing 0.1 M MnCl2 solution at -1.2 V (νs.
As shown in Fig. 3, MnO2 nano-plaminas in situ electrodeposited are composed of two crystal structures.
Online since: November 2014
Authors: Peng Ding, Han Ping Zhu, Song Fang, Hailin Liu
The structure, morphology and electrochemical properties of the products were investigated by XRD, SEM and constant current discharge-charge test.
We also used power X-ray diffraction and scanning electron microscopy to characterize the structure and morphology of nano Mn3O4.
This structure can increase the contact area between active materials and electrolyte, conductive carbon black, and shorten the transport length of Li+ and electrons.
This structure can increase the contact area between active materials and electrolyte, conductive carbon black, shorten the transport length of Li+ and electrons, and enhance the electron conductivity of Mn3O4.
Physical Chemistry Chemical Physics, 2003, 5(23): 5215-5220
Online since: February 2008
Authors: Cheng Peng, Zhen Zhang, Dong Lin Huang, Yan Li Liu
The change of the crystal structure with the content of doped Pr was investigated.
In this paper we present results of a systematic study of the structure, electrical conductivity and thermophysical properties of Ce1-xPrxO2-δ solid solutions prepared by gel-combustion method.
This suggests that at this temperature, which is significantly lower compared with traditional solid-state techniques [11] and lower than that used in hydrothermal synthesis [12], the samples can form a cubic fluorite structure.
Its crystal structure was calculated using the CELL program.
The results indicated that all the samples can be indexed to cubic structure.
Online since: January 2012
Authors: Yu Feng Li, Xiao Hui Gao, Hong Chao Wang
Transmission electron microscope(TEM) characterization indicated that the latex particles were form uniform analogous core-shell structure.
From the images, we can see that the emulsion particles have analogous core-shell structure obviously.
The chemical structure of the polyacrylate latex containing fluorine and silicon were detected by FT-IR and the results are presented in Fig. 5.
TEM micrographs revealed that the polyacrylate latex containing fluorine and silicon particles have analogous core-shell structure obviously.
Structure and properties of self-assembled fluorocarbon-silica nanocomposites, Journal of Non-Crystalline Solids. 354 (2008) 1074-1079
Online since: February 2008
Authors: Zhi Qiang Zhuang, Yu Dong Lu, Xin Wang
In the highly donor-doped conditions, the microstructure or solid solubility substituted defect structure as the main factor affecting the variety of resistivity.
The XRD patterns revealed that the samples are polycrystalline perovskite structure with no evidence of any secondary phases.
The results of the defect chemistry showed that holes and Pb vacancies were the major defects in lightly donor-doped BaPbO3 [10].
Many cation vacancies lead to a wide range of grain boundary structures and high potential barriers, and ultimately produce the PTCR behavior.
The room-temperature resistivity is determined by the defect structure, microstructure, and solid solubility.
Online since: June 2005
Authors: Ping Yang, H. Sun, Guo Jiang Wan, Yong Xiang Leng, An Sha Zhao, Nan Huang, Sh.N. Ge, Jun Ying Chen, Jin Wang
We conclude that the various film characteristics such as structure, composition and surface morphology due to the different oxygen partial pressures significantly influence the biological behavior of EC.
Introduction There has been in recent years a considerable upsurge in work on the surface structure and chemistry of materials with biological or biomedical applications.
The structure, composition and surface morphology of the Ti-O films were characterized using X-ray diffraction (XRD, X'Pert Pro MPD), X-ray photoelectron spectroscopy (XPS, XSAM-800), and Atomic Force Microscopy (AFM, SII, Autoprobe SPA400).
It is clear that the structure of the Ti-O film has been transferred from non-stoichiometric suboxides of TiO to a mixture of TiO and Ti2O3, and then transferred into stoichiometric TiO2 with increasing oxygen partial pressure.
Magnification 100 5 Conclusions The different characteristics of Ti-O films, such as structure, composition, and surface morphology due to different oxygen partial pressures, significantly influence the biological behavior of EC.