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Online since: October 2010
Authors: Zhen Ni Du, Yong Cai Zhang, Shi Yin Li
In air template-free synthesis of In2S3 hierarchical nanostructure from InCl3·4H2O and thiourea
Shi Yin Li1,a, Zhen Ni Du2,b, Yong Cai Zhang2,c,*
1School of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210046, China
2College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
alishiyin@njnu.edu.cn; bjane860605@yeah.net; czhangyc@yzu.edu.cn
Keywords: Semiconductors, Nanostructures, Chemical synthesis
Abstract.
The structure and optical property of the obtained products are characterized by X-ray diffraction (XRD), field emission scanning electronic microscope (FESEM), and UV-vis absorption spectra.
Both products displayed the characteristic XRD peaks corresponding to face-centered cubic structure In2S3 (JCPDS card no. 03-065-0459), and no XRD peaks arising from the possible impurities such as In2O3 and (NH4)2InCl5·4H2O can be visible, suggesting the preparation of phase-pure In2S3.
The structure and optical property of the obtained products are characterized by X-ray diffraction (XRD), field emission scanning electronic microscope (FESEM), and UV-vis absorption spectra.
Both products displayed the characteristic XRD peaks corresponding to face-centered cubic structure In2S3 (JCPDS card no. 03-065-0459), and no XRD peaks arising from the possible impurities such as In2O3 and (NH4)2InCl5·4H2O can be visible, suggesting the preparation of phase-pure In2S3.
Online since: February 2015
Authors: Yao Tang, Zhao Lin Zhan, Xiao Hua Yu, Miao Ma, Xiao Yu Li
The product through the SEM selected area electron diffraction and found the uniform spherical structure with crystal features in transmission electron microscopy, high rate of the particle size is about 0.5um[11-12].
Through experimental analysis, she pointed out that when Mn:Co is 0.7:0.3, the precursor for P2 single layered structure, and the lattice parameters a=0.2838nm, c=1.1112nm, C: a=3.92, charge discharge test to Li0.9 [Mn0.7Co0.3]O2, the capacitance of the material for the first time, charge and discharge of 152.70 mAh/g, and has good cycle performance.
Zhou, H.Xu: Journal of chemistry, Vol. 7 (2003) p. 449
[20] Z.Tang, Y.Ruan: Progress in chemistry, Vol. 17 ( 2005) p. 1.
Through experimental analysis, she pointed out that when Mn:Co is 0.7:0.3, the precursor for P2 single layered structure, and the lattice parameters a=0.2838nm, c=1.1112nm, C: a=3.92, charge discharge test to Li0.9 [Mn0.7Co0.3]O2, the capacitance of the material for the first time, charge and discharge of 152.70 mAh/g, and has good cycle performance.
Zhou, H.Xu: Journal of chemistry, Vol. 7 (2003) p. 449
[20] Z.Tang, Y.Ruan: Progress in chemistry, Vol. 17 ( 2005) p. 1.
Online since: April 2015
Authors: Jia Yan, Chen Lei Xiong, Chen Jing Qin, Xiu Li
We investigated the optical properties of ZnO/Au film structures fabricated by sputtering and spin coating.
Morphological study of the nano-structured samples have been investigated using SEM imaging.
Its structure and properties were studied and a possible formation mechanism was proposed.
Well distributed Au-ZnO structure shows obvious increase of UV emission compared to that of the pure ZnO.
Zhang, Affinity Binding-Guided Fluorescent Nanobiosensor for Acetylcholinesterase Inhibitors via Distance Modulation between the Fluorophore and Metallic Nanoparticle , Analytical Chemistry, 84 (2012), 2830-2836
Morphological study of the nano-structured samples have been investigated using SEM imaging.
Its structure and properties were studied and a possible formation mechanism was proposed.
Well distributed Au-ZnO structure shows obvious increase of UV emission compared to that of the pure ZnO.
Zhang, Affinity Binding-Guided Fluorescent Nanobiosensor for Acetylcholinesterase Inhibitors via Distance Modulation between the Fluorophore and Metallic Nanoparticle , Analytical Chemistry, 84 (2012), 2830-2836
Online since: May 2004
Authors: Victor Fruth, Daniela Cristina Berger, Maria Zaharescu, M. Gatner, Monica Popa, L. Predoana
Zaharescu
1.
1
Institute of Physical Chemistry, Romanian Academy, Spl.Independentei 202, Bucharest 77208,
Romania.
2
Tokyo Institute of Technology, Materials and Structures Laboratory, Nagasuta 4259, Midori-ku,
Yokohama 226-8503, JAPAN
3
"Politehnica" University Bucharest, Department of Inorganic Chemistry, 1 Polizu street, 78126Bucharest,
Romania
Keywords: bismuth oxides, ionic conductor, sol-gel route.
Nonequilibrium crystal structures can be stabilized by producing nanometer-scale crystallites or by epitaxially depositing the material onto a template with a crystal structure similar to the one desired.
Unfortunately, the cubic structure is only stable from 705-740ºC to the melting point at 825ºC.
The cubic crystal structure of δ-Bi2O3 is a defect fluorite structure with disordered occupancy of the cation sites and disordered vacancies on the oxygen sites [4,6].
The IR spectra were recorded in order to obtain more data about structure of the prepared precursors.
Nonequilibrium crystal structures can be stabilized by producing nanometer-scale crystallites or by epitaxially depositing the material onto a template with a crystal structure similar to the one desired.
Unfortunately, the cubic structure is only stable from 705-740ºC to the melting point at 825ºC.
The cubic crystal structure of δ-Bi2O3 is a defect fluorite structure with disordered occupancy of the cation sites and disordered vacancies on the oxygen sites [4,6].
The IR spectra were recorded in order to obtain more data about structure of the prepared precursors.
Online since: December 2012
Authors: Hilbeth P. Azikri de Deus, Guilherme S. Paez Dupim, Claudio R. Avila da Silva
The shearing load results in breakdown of the network (continuous structures) into flocs (kind of smaller network structures).
Let us for simplicity assume that the extension of the network structures follows the Hooks Law, i.e. , where is the structural shear modulus of the completely structured substance (network structure) and is the shear extension (or shear deformation).
In the field of chemistry a well-known principle affirms that the rate of a reaction is proportional to the concentration of the reacting substances, and this assumption is in agreement with the approach adopted here.
Hatfield, Colloid and capillary chemistry, Methuen, 1926
Drake, A general mathematical survey of the coagulation equation, International Reviews in Aerosol Physics and Chemistry 3 (1972) 201–376
Let us for simplicity assume that the extension of the network structures follows the Hooks Law, i.e. , where is the structural shear modulus of the completely structured substance (network structure) and is the shear extension (or shear deformation).
In the field of chemistry a well-known principle affirms that the rate of a reaction is proportional to the concentration of the reacting substances, and this assumption is in agreement with the approach adopted here.
Hatfield, Colloid and capillary chemistry, Methuen, 1926
Drake, A general mathematical survey of the coagulation equation, International Reviews in Aerosol Physics and Chemistry 3 (1972) 201–376
Online since: August 2011
Authors: Jing Hua Yu, De Jin Zang, Lei Ge, Pei Ni Zhao, Jia Dong Huang
A High Throughput and High Selective Chemiluminescence Method for Quantification of Bifenthrin Based on Molecularly Imprinted Film
Dejin Zang 1, a, Lei Ge 1,b, Peini Zhao1,c , Jinghua Yu1,d* and Jiadong Huang2,e
1 Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
2College of Medicine and Life Sciences, University of Jinan, Jinan 250022, China
aZangdejin_lm@163.com, bjndxgelei@gmail.com, czhaopn_1985@163.com, bujn.yujh@gmail.com, etiger7955@163.com, * corresponding author
Keywords: Sol-gel material; Molecularly imprinted film; Chemiluminescence; 96 micro-well plate; Bifenthrin
Abstract.
One novel highly cross-linked, shape-controllable molecularly imprinted sol-gel film (MISF) with good thermal and chemical stability and three-dimensional network porous structure has been developed.
Molecular imprinting is a novel methodology which provides molecular assemblies of desired structures and properties and is being increasingly used for several applications such as in separation processes, immunoassays and antibody mimics, catalysis, artificial enzymes, biosensor recognition elements and bio- and chemo-sensors.
One novel highly cross-linked, shape-controllable molecularly imprinted sol-gel film (MISF) with good thermal and chemical stability and three-dimensional network porous structure has been developed.
Molecular imprinting is a novel methodology which provides molecular assemblies of desired structures and properties and is being increasingly used for several applications such as in separation processes, immunoassays and antibody mimics, catalysis, artificial enzymes, biosensor recognition elements and bio- and chemo-sensors.
Online since: May 2011
Authors: Wei Xin Dong, Jun Feng Zhu, Guang Hua Zhang
Preparation and Properties of Amino Acid Chelating Resin from the Waste Plastic of Polystyrene
Guanghua Zhang a, Weixin Dong b, Junfeng Zhu c
Key Laboratory of Light Chemical Additives Chemistry and Technology in Ministry of Education in Shaanxi University of science & technology, Xi’an 710021, China
a email: zhanggh@sust.edu.cn, bemai:0806026@sust.edu.cn, cemail:zjfeng123123@163.com
*Corresponding author: Weixin Dong
Key words: Chloromethylated polystyrene; Amino acid resin; Synthesis; Adsorption properties.
The structure of resin was characterized by IR and thermal analysis represents.
Our research based on the deserted polystyrene foamed plastics as raw materials, prepared an environment-protecting amino acid type chelating resin, then analyzed its structure and evaluated the properties of adsorption for the heavy metal ions Cr3 +, Pb2 +.
References [1] Qifa Liu, Baojiao Gao: Journal of High School Chemistry Vol.27 (2006), P.380 in Chinese
The structure of resin was characterized by IR and thermal analysis represents.
Our research based on the deserted polystyrene foamed plastics as raw materials, prepared an environment-protecting amino acid type chelating resin, then analyzed its structure and evaluated the properties of adsorption for the heavy metal ions Cr3 +, Pb2 +.
References [1] Qifa Liu, Baojiao Gao: Journal of High School Chemistry Vol.27 (2006), P.380 in Chinese
Online since: September 2013
Authors: Lang Lang, Qi Chang Dai, Miao Yu, Yu Bin Ji
Spatial structure of polysaccharides’ molecules
Polysaccharides’ anti-tumor activity is influenced by stereo chemical structure as well as primary structure; moreover, their activity depends on higher structures more than primary structure.
Two else structures have no action.
Structural modification of polysaccharides The structures of polysaccharides have four levels as primary structure, secondary structure, tertiary structure, quarternary structure, and the last three could be called higher structures.
Quarternary structure is spatial structure formed by various chemical bonds in or between polysaccharide molecules.
Pharmaceutical Chemistry.
Two else structures have no action.
Structural modification of polysaccharides The structures of polysaccharides have four levels as primary structure, secondary structure, tertiary structure, quarternary structure, and the last three could be called higher structures.
Quarternary structure is spatial structure formed by various chemical bonds in or between polysaccharide molecules.
Pharmaceutical Chemistry.
Online since: March 2004
Authors: Y.S. Lee, Won Ho Kang
Structure and Dissolution Properties of Phosphate Glasses
for Glass Fertilizer
Y.
The K2O contents, which could cause the structure change from network structure to polymeric chain structure, have direct proportion with the thermal expansion coefficient and inverse proportion with Tg and Ts.
However the network structure transfer to polymeric chain structure from the more the 10mole% of SiO2, which is affected by creation of monomer or dimmer of [PO4] due to the increase of K2O/P2O5 ratio.
Day, Chemical durability and structure of zinc-iron phosphate glasses", J.
Yung, FTIR and XPS studies of low-melting PbO-ZnO-P2O5 glasses", Mat. chemistry and physics, Vol.50 (1997), p.1-10 [3] Yoon Young Jin, Yoon Tae Min, Lee Yong Soo and Kang Won Ho, "Dissolution and Structure Analysis of Phosphate Water Soluble glasses", Kor.
The K2O contents, which could cause the structure change from network structure to polymeric chain structure, have direct proportion with the thermal expansion coefficient and inverse proportion with Tg and Ts.
However the network structure transfer to polymeric chain structure from the more the 10mole% of SiO2, which is affected by creation of monomer or dimmer of [PO4] due to the increase of K2O/P2O5 ratio.
Day, Chemical durability and structure of zinc-iron phosphate glasses", J.
Yung, FTIR and XPS studies of low-melting PbO-ZnO-P2O5 glasses", Mat. chemistry and physics, Vol.50 (1997), p.1-10 [3] Yoon Young Jin, Yoon Tae Min, Lee Yong Soo and Kang Won Ho, "Dissolution and Structure Analysis of Phosphate Water Soluble glasses", Kor.
Online since: February 2019
Authors: Vyacheslav A. Dudko, Boris P. Yur'ev
Italian band chemistry was as following. mass %: 0.04 С; 18.17 Cr; 8.55 Ni; 1.54 Мn; 0.44 Si; 0.001S; 0.020 P; 0.20 Сu.
As is clear from the given chemistry the metal of the evaluated stock coils (welded in Tumen) and the Italian band delivered in the amounts of one ton each complies with that of steel 04Х18Н10 (GOST 5632–72) based on the incoming inspection results and certificate data (for the band).
In the course of further annealing process development for capillary tubes of various chemistry (with various carbon and titanium content) adjustment of the heat treatment conditions shall be apparently expected (first of all with regard to annealing temperature), but within a very insignificant range.
Investigation was carried out for development of heat treatment conditions for capillary tubes for medical needles with a certain level of mechanical properties satisfactory for plastic strain at the tube drawing along the desired path and with a view of determining the protective atmosphere impact on the surface quality, structure, mechanical properties in the course of heat treatment and elasticity in the course of tube drawing.
The optimal heat treatment conditions (heating time, annealing temperature, controlled atmosphere and protective gas type and flows) were established for each tube size, allowing tube fabrication with light surface, structure and properties complying with the imposed requirements.
As is clear from the given chemistry the metal of the evaluated stock coils (welded in Tumen) and the Italian band delivered in the amounts of one ton each complies with that of steel 04Х18Н10 (GOST 5632–72) based on the incoming inspection results and certificate data (for the band).
In the course of further annealing process development for capillary tubes of various chemistry (with various carbon and titanium content) adjustment of the heat treatment conditions shall be apparently expected (first of all with regard to annealing temperature), but within a very insignificant range.
Investigation was carried out for development of heat treatment conditions for capillary tubes for medical needles with a certain level of mechanical properties satisfactory for plastic strain at the tube drawing along the desired path and with a view of determining the protective atmosphere impact on the surface quality, structure, mechanical properties in the course of heat treatment and elasticity in the course of tube drawing.
The optimal heat treatment conditions (heating time, annealing temperature, controlled atmosphere and protective gas type and flows) were established for each tube size, allowing tube fabrication with light surface, structure and properties complying with the imposed requirements.