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Online since: April 2014
Authors: Karol Iždinský, František Simančík, Pavol Štefánik, Lucia Senčeková, Pavol Švec
Structure of the Ni coated Mo/Mo silicide wire as revealed in cross sectional view is presented in Fig. 3.
Fig. 4 Secondary electron micrographs (a, b) revealing structure of compacted Ni coated Mo/Mo silicide wire composite Microstructural analysis in Fig. 5 revealed the distribution of Mo, Si and Ni in the interfacial zone.
Particularly it provides structures exhibiting various kinds of structural inhomogeneities including pores, voids and cracks.
It appears that extremely high compaction temperatures are required to get the fully compacted structures, what is difficult to realize in practice.
They are believed to be governed by local chemistry.
Online since: September 2011
Authors: Hui Xu, Yuan Guo Xu, Shuo Wiei Zhao, Hua Ming Li
Photocatalytic degradation of methylene blue over Co-Ag3VO4 under visible light irradiation Shuowiei Zhao1,a, Hui Xu2,b, Huaming Li2,c,*, Yuanguo Xu2,d 1 Zhenjiang Institute of Environmental Science, Zhenjiang, 212001, China; 2 School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R.China; bE-mail:xh@@ujs.edu.cn, *cE-mail: lihm@ujs.edu.cn Key words: Co-Ag3VO4; visible light; photocatalytic; methylene blue.
BiVO4, with a scheelite monoclinic structure[18-20], and AgNbO3 [21], with a perovskite structure showed photocatalytic activities for O2 evolution from aqueous solutions containing Ag+ as electron scavenger under visible light irradiation.
Jiao, Monoclinic structured BiVO4 nanosheets: hydrothermal preparation, formation mechanism, and coloristic and photocatalytic properties.
[20] S.Tokunaga, H.Kato, A.Kudo, Selective preparation of monoclinic and tetragonal BiVO4 with scheelite structure and their photocatalytic properties.
Kudo, Role of Ag+ in the band structures and photocatalytic properties of AgMO3 (M: Ta and Nb) with the perovskite structure.
Online since: September 2013
Authors: Xiu Feng Xiao, Shan Shan Wu, Qiu Ling Yao, Xiao Xuan Lin, Xuan Qin
Diagram of molecular structure of CAPB Materials and experimental methods Preparation of the samples. 0.10 mol / L Ca (NO3) 2 and 0.06 mol / L (NH4)3PO4 solution were prepared respectively, standby.
This particular structure makes the HA has a larger surface area, so that it has great potential in terms of adsorbed on the catalyst as well as drug delivery.
With the continuous release of Ca2 + from the rod-like micelles - Ca2 + complex, HA nuclei priority growth along the rod-like micelles into a one-dimensional rod-like structure.
Therefore, nucleation from a surface of the spherical micelle, the rod-like micelles induce the HA nucleating directional growth, and finally generate a three-dimensional pore structure HA microspheres.
The CAPB and HA structure crystal ion interaction, the role of enhanced as the CAPB concentration increases, and can affect the HA crystal morphology, embody CAPB induced crystal nucleation and growth.
Online since: July 2011
Authors: Juan Wang, Ying Lin Yan, Yun Hua Xu, Zhen Xing Luan
In particular, morphology-controlled syntheses of nano-structured optical materials have great significance in systematic fundamental studies of crystal growth and exploring new applications.
As is known, GdVO4 with zirconia structure is a promising material for rare earth-activated oxide phosphors and near-infrared lasers [4].
All XRD patterns can be readily indexed to a zirconia-type tetragonal structure with lattice constants comparable to the values given in JCPDS 72–0277 [14].
But a second phase could be detected when the pH rose to 14, and all the peaks of second phase could be indexed to the Gd(OH)3 (JCPDS Card No.38-1042) [14] with hexagonal structure.
Chen, Spectroscopic properties of lanthanides in nanomaterials, in: Handbook on the Physics and Chemistry of Rare Earths, edited by K.A.
Online since: April 2011
Authors: Jacques Huot, Manuel Tousignant
It has been investigated by Akiba’s group which found from neutron diffraction that TiV1.1Mn0.9 forms two hydrides: a mono-hydride with a pseudo-cubic FCC structure and a di-hydride with a CaF2 structure [7-9].
Contrary to the pure vanadium case, all compounds have a multiphase C14/BCC structure.
Usually, different plateau pressure means different crystal structure of the hydride phases.
As expected from figure 4, two crystal structures are present.
Wiswall Inorganic Chemistry: 9 (1970), p. 1678
Online since: February 2019
Authors: O. Pustylnik, Evgeny Velichko
At the present stage, the requirements for thermal protection of the enclosing structures of apartment buildings and other heated facilities that are raised by 3...3.5 times have been determined.
One of the most effective materials for newly constructed and reconstructed buildings and structures are wall blocks of light types of concrete (gas and foam concrete, polysterene concrete) [1].
It is obvious that an increase in strength at a constant average density can be achieved only through a qualitative improvement in its structure.
It is obvious that at the initial stage of the structure formation, the fixation of the hydrate phase particles is carried out in the position of close coagulation, creating a dense, strong structure of the cement stone [8].
Adamson, Physical chemistry of surfaces.
Online since: August 2020
Authors: Artem Kariev, Elena Barabash, Tatyana Obizhenko, Vladimir Lebedev, Yuliya Danchenko
It is shown that these conditions provide for the formation of a uniform structure of the filled composite with less internal stresses.
From these composites are made various building products and structures, building boards, floor boards, terraces, pipes, fences, siding, wall panels, roofs, products for facing building structures, etc.
Higher density allows the use of composites in exterior structures.
Obviously, this provides the formation of a more uniform structure of the filled composite with less internal stresses.
Barabash, The acid-base interaction role in the processes of the filled diane epoxy resin structuring, Chemistry and Chemical Tech., 12, 2 (2018) 188−195
Online since: October 2014
Authors: Yun Chu Hu, Yi Qiang Wu, Xin Li Zhang, Hong Hui Zhang
China 2School of Applied Chemistry and Environmental Engineering, Xinyang Vocational and Technical College, Xinyang, P.R.
The basic properties, bonding properties, chemical structure, thermal behavior, and the morphology of the cured adhesive were investigated, the results were present in the following narrative.
The chemical structure information of adhesive was investigated by FTIR spectrometer, as shown in Fig. 2.
The strengthened molecular structure of ammonium stearate modified Na2SiO3 wood adhesive was supported by the TGA result as shown in Fig. 4.
The performance improvements of the modified silicate adhesive were supported by its strengthened molecular structure and thermal stability
Online since: May 2023
Authors: Xue Feng Bai, Wei Wu
Using XRD, N2 physical adsorption, SEM and Py-IR analysis media, the effects of aluminum sources on the crystal and pore structure, morphology, B-acid center strength of the prepared SAPO-41 molecular sieves.
Pseudo-boehmite type has little effect on the crystal structure and chemical composition of SAPO-41 molecular sieve, but has different effects on its morphology, pore structure, B-acid strength of SAPO-41, and Pd dispersion on Pd/SAPO-41.
Pyridine adsorption infrared (Py-IR) is completed on PE-100 infrared spectrometer. 2 Experimental Results and Discussion 2.1 Effect of Al source on structure, chemical composition and morphology of SAPO-41 Pseudo-boehmite is an alumina hydrate with an incomplete crystal structure.The different physicochemical properties of pseudo-boehmite will lead to differences in the chemical composition, structure and acidity of the synthesized SAPO-41, thus affecting the catalytic hydroisomerization performance of Pd/SAPO-41 bifunctional catalysts.
The pseudo-boehmite type does not effect on the crystal structure and chemical composition of SAPO-41 molecular sieves, but has different effects on the morphology, pore structure, B-acid strength, and Pd dispersion on the surface of Pd/SAPO-41.
Part 1: Current State of Research on SAPO-11 and SAPO-41 Synthesis, Petroleum Chemistry,61, (2021)836–851 [6] J Liang, F Wang.
Online since: June 2012
Authors: Alejandro Manzano Ramirez, Archana Tiwari, Roopesh Jain, Anushri Saxena
Green Chemistry for the Production of Biodegradable Polymers as Solid Substrate and the Formation of Sustainable Biofilm Archana Tiwari1, Alejandro Manzano Ramirez2, Roopesh Jain1, Anushri Saxena1 1School of Biotechnology, Rajiv Gandhi Proudyogiki Vishwavidyalaya, Air port by pass road, Bhopal- 462033 (M.P.)
The structure, physio-chemical properties, monomer composition and the number and size of the granules vary depending on the organism (Anderson and Dawes, 1990; Ha and Cho, 2002).