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From the analysis, eggshell has been successfully decorated over GO structure, where GO-calcium bond was observed in the FTIR spectra.
Therefore, it is very interesting to analyze the influence of surface chemistry between GO/ES adsorbent and fluoride adsorbate.
This solution was initially sonicated for 1 h to enhance the exfoliation of GO structure prior to ES mixing.
Surface chemistry of GO/ES adsorbent is one of the factors that affecting the fluoride removal in wastewater.
This formation contributes to increasing the affinity of surface chemistry towards fluoride.

Crystals M2Ni (SO4)2.XH2O (M=Na, X=4; M=K, NH4, Rb, Cs, X=6): Crystal Structures, Spectrum and Thermal Stability Characterizations Xia Wang 1, Mingqing Xing 2 1 School of Chemistry and Chemical Engineering, Weifang University, Weifang, China 2 School of Economics and Management, Weifang University, Weifang, China wangxia-2001@163.com Keywords: single crystal structures, X-ray diffraction method, optical transmission spectrum, d-d electron transition, thermal stability Abstract.
The similarity in optical spectrum is consistent with the comparability of structures.
This phenomenon is different to six water molecule structures of other compounds.
From crystal chemistry viewpoint, a high ionic radii of metal cations {R(M+)} and {R(M´2+)}, low numbers of crystal water molecules are favorable for crystallization of M2SO4·M´SO4·nH2O double salts.
Molecular Structure ,Vol.706(2004), p.57-63

Reaction Mechanism of Perovskite KNbO3 in Aqueous Solution Kenji Toda 1, Saori Tokuoka 1, Naotaka Ohtake 2, Kazuyoshi Uematsu 2 and Mineo Sato 2 1Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan 2 Department of Chemistry and Chemical Engineering, Niigata University, Niigata 950-2181, Japan Keywords: Layered Perovskite, Crystal Structure, Solution, Potassium Niobate, Reaction Mechanism, Nanosheet ABSTRACT Nanosize particles of potassium niobate KNbO3 were prepared by a soft chemistry method.
Crystal structure of soft chemical KNbO3 was determined by Rietveld refinement method for neutron diffraction patterns.
In this method, rock-salt-type KF blocks in a layered perovskite, K2NbO3F, with a K2NiF4-type structure was selectively dissolved in water to produce perovskite nanosheets at room temperature [7-9].
Rietveld structure refinement was carried out with the program RIETAN2000 [11].
Figure 3 shows the powder neutron diffraction pattern fitting for KNbO3 prepared by the soft chemistry method.

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But there are few reports on doped CrSi2 electronic structure (energy band structure and density of states) and its theoretical or experimental study on optical properties.
At first, we used BFGS [19-22] method to geometrically optimize the supercell structures of CrSi2 (2×1×1) before and after doping, then the structures after geometry optimization are used for the calculation of electronic structure and optical property.
So it is totally understandable that the cell volume slightly increases after doping based on quantum chemistry theory.
Electronic Structure.
QianKeHeJZi [2010]2001) [2] Guizhou Key and Special Laboratory of Functional Material & Resource Chemistry, China References [1] V.E.Borisenko (Ed.), Semiconducting Silicides, Springer, Berlin, 2000, pp.85-87

China 2College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P.R.
China 3College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P.R.
ZR2010BL025), Open Project of State Key Laboratory of Supramolecular Structure and Materials (No. sklssm201323)(Jilin University), State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (No. 2011-13)(Jilin University).
:Chinese J. of Chemistry, Vol. 19 (2001) No.7, p.675
:Analytical Chemistry, Vol. 30 (2002) No.1, p.125.

Electronic Structures.
Fig. 2 depicts the band structures of the materials.
Li, Interaction of amino acids and single-wall carbon nanotubes, The Journal of Physical Chemistry C, 116(2) (2012) 1724-1731
Junizah, Carbon nanotubes: a review on structure and their interaction with proteins, Journal of Chemistry, 2013 (2013)
Shojaie, A comprehensive density functional theory study on molecular structures of (5, 5) carbon nanotube doped with B, N, Al, Si, P, Co, and Ni, Computational and Theoretical Chemistry, 1114 (2017) 55-64

China 2 Department of Applied Chemistry, School of Science, Tianjin University of Commerce, Tianjin 300134, P.
China 3 Department of Applied Chemistry, School of Science, Tianjin University of Commerce, Tianjin 300134, P.
The crystal structures of them were analyzed by X-ray diffractometer.
Effects of initial potential on the crystal structure of TiO2 thin films.
(4) Oxidation time has no effect to the crystal structure of TiO2 thin films.

Particular attention is devoted to synthesis and processing, especially mechanical alloying and mechano-chemistry, and to the correlation between processing, parameters and physical properties.
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