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Online since: January 2015
Authors: Pavlo V. Kryvenko, Sergii Guzii, Hameedi Abdullah Jafar Al-Musaedi
It is known that load-bearing metallic structures that are in service in the atmospheric conditions showed that are exposed to corrosion.
Introduction In typical atmospheric conditions, the corrosion of metal structures occurs due to the action of short-circuited electrochemical cells.
Task of the study was to develop a geocement coating designed to protect metal structures from atmospheric corrosion.
Safronchik, Corrosion protection of building structures and technological equipment Stroyizdat, Leningrad, 1988
Guziy, Features of processes of structurization of binders compositions in the system “xNa2O∙yAl2O3∙nSiO2∙mH2O, Proceedings of XII Symposium on Science and Research in the Silicate Chemistry, Chemistry of no silicate binders and technology application, SILICHEM Brno 19-21.09.2007, Czech Republic, pp. 35-41
Online since: August 2014
Authors: Hui Bai, Hong Gao, Ming Hu
A Zigzag Chain Cd (II) Coordination Polymer Based on 2,4-Dinitro-benzoic Acid Ligand: Syntheses, Structure and Photoluminescence Hui Bai1,a, Hong Gao1,b and Ming Hu1, c 1Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China aemail :baihuiguoguo@163.com bemail :honggood@hotmail.com cemail(corresponding author):hm988@126.com Keywords: Coordination polymer, 2,4-dinitro-benzoic acid, Crystal structure, Photoluminescence, Property Abstract: The coordination polymer, namely, [Cd(L)2(phen)]n (1) (HL=2,4-dinitro-benzoic acid, phen=1,10-phenanthroline) has been hydrothermally synthesized.
The carboxylate groups of L- adopt the bridging monodentate and bidentate modes to link two Cd2+ ions, resulting in a 1-D zigzag chain structure.
Then, we described the synthesis, characterization and crystal structure of a metal-organic coordination polymer, namely, [Cd(L)2(phen)]n (1).
The structure was solved by direct methods and refined on |F|2 by full-matrix least-squares using SHELXTL97 crystallographic software package.
The structures of compound show 1-D zigzag chains structure.
Online since: January 2009
Authors: Jian Guo Yu, Qin Hui Zhang, Shao Peng Li, Shu Ying Sun, Xian Sheng Yin
The physical chemistry structure are characterized by XRD, TEM/HRTEM, SAED and N2 adsorption-desorption analysis; and the lithium selective adsorption properties are tested by the adsorption isotherm measurement and demonstrated with the distribution coefficient of a series of alkaline and alkaline-earth metal ions.
The specific characteristic arises partly from their rigid structure with little swelling or shrinking in aqueous phases and brought about a strong steric effect or an ion-sieve effect for various ions depending on the hydrated or dehydrated size of the adsorbed ions.
We carefully compared the synthesis process with those in the related literature, and confirm the point of view of Kasuga [9, 10] and Li [11] that the washing and dispersing process is very important to obtain the layered or tubular structure.
Figure 3-b is a typical HRTEM image of a single nanoribbon with well-defined lattice structure.
Table 1 shows the physical chemistry texture properties of the nanocrystal TiO2 (TO-R), Li2TiO3 ternary oxide precursor (LTO-R) and the derived ion-sieves (STO-R).
Online since: June 2012
Authors: Dan Yu Jiang, Qiang Li, Lin Zhang, Cai Xia Li, Lei Su
Structure and Luminescence Characteristics of Terbium Hydroxide Nanosheets Doped with Eu3+ Lin Zhang1a, Caixia Li1, Danyu Jiang2, Lei Su1 and Qiang Li1b 1 Department of Chemistry, East China Normal University, Shanghai, China 2 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China a 715zhanglin@163.com; b qli@chem.ecnu.edu.cn Keywords: nanosheets; terbium hydroxide; Luminescence; microwave Abstract.
The structure of layer compound and the morphology of nanosheets were determined by XRD and TEM.
This paper reported the structure and luminescence characteristics of Eu3+ doped Terbium Hydroxide nanosheets, which were obtained after the synthesis and exfoliation of layer compound of (Tb1-xEux)2(OH)5NO3·1.5H2O.
Fig. 3 gives the Scanning Electron Microscopy (SEM) picture which suggests that the samples we got is Lamellar structured, and the size of several micrometers, and provides a strong evidence for the exfoliation of layered material.
Li, Structure and Luminescence Characteristics of Yttrium Hydroxide Nanosheets Doped with Eu3+, Advanced Materials Research . 177 (2011) 269-271
Online since: April 2014
Authors: Feng Ping Wang, Mei Xu, Yan Zhen Lu, Xue Jiao Liu, Jian Ling Hu, Yan Li, Quan Shui Li
The Journal of Physical Chemistry C, 2008, 112(29): 10773-10777
The Journal of Physical Chemistry C, 2011, 115(18): 9136-9145
The Journal of Physical Chemistry, 1993, 97(25): 6692-6695
Journal of Materials Chemistry, 2011, 21(8): 2495-2501
The Journal of Physical Chemistry B, 2002, 106(37): 9463-9483
Online since: May 2012
Authors: Muhammad Shuaib, M. Siddiq, S. Aftab, H. Nawaz
The chemistry of zirconium and titanium is similar as they belong to the same group.
The perovskite structure of the powder is developed by calcining the powder at this temperature.
Sanchez in: Sol-Gel Chemistry of Transition Metal Oxides, Volume 18, Progress in solid state chemistry, (1988)
Livage in: Better ceramics Through Chemistry III, Mater.
Scherer: Sol-gel Science: The Physics and Chemistry of Sol-Gel Processing (Academic Press, San Diego, 1990)
Online since: February 2007
Authors: Chang Chun Ge, Xin Tai Su, Qing Zhi Yan
In order to solve these problems, several solution chemistry routes such as sol-gel method [8-9] have been tried.
So a pure BCN18 phase with complex perovskite structure was formed at 800°C.
Conclusions A novel wet chemistry method was used to prepare single-phase samples of BCN18.
Furthermore it was discovered that a pure BCN18 phase with complex perovskite structure was formed at 800°C.
Inorganic Chemistry, Vol. 20 (2004), pp. 57
Online since: September 2013
Authors: Yan Liu, Jian Ming Wang, Chun Lin He, Yang Liu
A new technology to obtain a fine-structured and high-toughness HAZ of HSLA steel for high heat input welding is developed using metallurgical thermodynamics, physical chemistry of metallurgy and material processing methods synthetically in this study.
In such a situation, further enhancement of HAZ toughness and strength in structural steel plates has come to constitute important development subjects in order to insure the safety of steel structures [3-5].
Therefore, a new technology to obtain a fine-structured and high-toughness HAZ is developed for the purpose of realizing excellent toughness in a HAZ of HSLA steel for high heat input welding using metallurgical thermodynamics, physical chemistry of metallurgy and material processing methods synthetically in this study.
Online since: July 2012
Authors: Jin Shui Yao, Mei Li, Wen Guang Li, Ying Kai Liu, Jun Liu
The morphology and structure of the nanoparticles had been studied by scanning and transmission electronic microscopes (TEM), X-ray diffractometer and Fourier Transform Infrared Spectroscopy (FTIR) and the results indicated the nanocomposites were core-shell structure.
The Cu/PPy composite spheres with well-defined core-shell structures were synthesized and showed uniform spherical morphology.
This synthetic route simplifies the procedure to prepare nanoparticles with a core–shell structure and it takes place in aqueous solution at room temperature.
Shi; Materials Chemistry and Physics, Vol. 102 (2007) No.2, p.255
Li; Journal of Materials Chemistry, Vol. 15 (2005) No.26, p.2551
Online since: May 2022
Authors: Rui Gi Gong, Zhang Chen, Kai Qiang Zhang, Yan Feng Gao
The method is wildly used to prepare nanocomposites with unique structures such as core-shell [4] structure and hierarchical [5] structure.
The calcined SST samples possessed a tetragonal rutile structure, and without other phases (e.g.
Fig. 4d shows the coating structure was replaced by the congery appearance at a excessively content of ATO.
Xu, Hydrothermal synthesis of 3D hierarchically flower-like structure Ti/SnO2-Sb electrode with long service life and high electrocatalytic performance, Journal of Electroanalytical Chemistry, 855 (2019) 113635
Dai, Fabrication and excellent conductive performance of antimony-doped tin oxide-coated diatomite with porous structure, Materials Chemistry and Physics, 133 (2012) 907–912