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Online since: March 2012
Authors: Jin He Jiang, Bin Shan
The Synthesis and Ion-exchange Property of Li+ Memorized Inverse Spinel Al0.75Fe1.25(PO4)2
Jinhe Jiang Bin Shan
MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China
Corresponding author.
In this paper, the discussion is about the synthesis, structure and ion exchange of the Al-Fe composite oxide inorganic ion exchanger of Li+ with the ability of memory and inverse spinel structure.
The structure of compound metal oxide Al0.75Fe1.25(PO4)2 crystallized at 720℃ was much perfect.
Rare Metal. 1999,18(2),143 [2] Z.S.Peng, Y.S.Yan, C.Y.Jiang, C.R.Wan, H.C.Gao: Advance on extraction lithium from salt lake, J.Chemistry Online. 1997,(12),11 [3] Y.F.Liu, Q.Feng, Kenta Ool: Li extraction/insertion reaction with LiAlMnO4 and LiFeMnO4 spinels in the Aqueous phase, J.Journal of Colloid and Interface Science. 1994,163(1),130 [4] H.Zhong: Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells, J.Chinese Journal of Applied Chemistry. 2000,17(3),307
In this paper, the discussion is about the synthesis, structure and ion exchange of the Al-Fe composite oxide inorganic ion exchanger of Li+ with the ability of memory and inverse spinel structure.
The structure of compound metal oxide Al0.75Fe1.25(PO4)2 crystallized at 720℃ was much perfect.
Rare Metal. 1999,18(2),143 [2] Z.S.Peng, Y.S.Yan, C.Y.Jiang, C.R.Wan, H.C.Gao: Advance on extraction lithium from salt lake, J.Chemistry Online. 1997,(12),11 [3] Y.F.Liu, Q.Feng, Kenta Ool: Li extraction/insertion reaction with LiAlMnO4 and LiFeMnO4 spinels in the Aqueous phase, J.Journal of Colloid and Interface Science. 1994,163(1),130 [4] H.Zhong: Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells, J.Chinese Journal of Applied Chemistry. 2000,17(3),307
Online since: May 2011
Authors: Dao Wu Yang, Ling Zhu, Xue Qiang Cao
Sonochemical Synthesis and Luminescence Property of YF3:Eu3+ Nanocrystals
Ling Zhua, Xueqiang Caob and Daowu Yangc
Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China
azhulingster@gmail.com, bxcao@ciac.jl.cn, cdaowuy@163.com
Keywords: Aqueous solution; YF3:Eu3+; Ultrasound irradiation;
Abstract.
These extreme transient high pressures and temperatures provide a unique environment for the growth of materials with novel structures and can promise a very short reaction time [3].
The study of rare-earth fluorides is currently an active research field in modern materials chemistry due to their many potential applications in optics, biological labeling, catalysis fields, etc [4].
Results and discussion Structure and morphology of the nanocrystal Fig. 1.
All peaks can be well indexed to the orthorhombic YF3 structure in good agreement with the literature values of JCPDS (File No. 32-1431).
These extreme transient high pressures and temperatures provide a unique environment for the growth of materials with novel structures and can promise a very short reaction time [3].
The study of rare-earth fluorides is currently an active research field in modern materials chemistry due to their many potential applications in optics, biological labeling, catalysis fields, etc [4].
Results and discussion Structure and morphology of the nanocrystal Fig. 1.
All peaks can be well indexed to the orthorhombic YF3 structure in good agreement with the literature values of JCPDS (File No. 32-1431).
Sintering and Electrical Properties of Ce0.8Sm0.2O1.9 Solid Electrolyte Modified by Addition of MnO2
Online since: February 2011
Authors: Lu Cun Guo, Yi Feng Zheng
X-ray diffraction analysis showed that all the samples exhibit a fluorite structure.
The formation of completely phase-pure CeO2 with cubic fluorite structure (Fm3m) is observed in all the samples.
Jadhav, Materials Chemistry and Physics Vol. 109 (2008), p. 39 [20] K.
Jacobson, Chemistry of Materials Vol. 19 (2007), p. 4702 [30] W.
Karan, Materials Chemistry and Physics Vol. 115 (2009), p. 728
The formation of completely phase-pure CeO2 with cubic fluorite structure (Fm3m) is observed in all the samples.
Jadhav, Materials Chemistry and Physics Vol. 109 (2008), p. 39 [20] K.
Jacobson, Chemistry of Materials Vol. 19 (2007), p. 4702 [30] W.
Karan, Materials Chemistry and Physics Vol. 115 (2009), p. 728
Online since: August 2013
Authors: Dan Jun Wang, Yan Zhong Zhen, Feng Fu, Gang Lin Xue
Hydrothermal Synthesis of Zn2(MoO4)(SeO3) and Photocatalytic Applications
Yanzhong Zhen 1, a, Danjun Wang 1, b, Feng Fu 1,c, Ganglin Xue 2,d
1 College of Chemistry & Chemical Engineering, Yan'an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an 716000, People’s Republic of China.
2 Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Department of Chemistry, Northwest University, Xi’an, 710069, People’s Republic of China.
The structure was solved by direct methods using the program SHELXS-97.
Results and discussion FE-SEM, XRD, TG and Crystal Structure of the sample.
Figure 1 The morphology, phase composition and crystal structure of sample.
(A) FE-SEM picture, (B) XRD and (C) Crystal structure of Zn2(MoO4)(SeO3).
The structure was solved by direct methods using the program SHELXS-97.
Results and discussion FE-SEM, XRD, TG and Crystal Structure of the sample.
Figure 1 The morphology, phase composition and crystal structure of sample.
(A) FE-SEM picture, (B) XRD and (C) Crystal structure of Zn2(MoO4)(SeO3).
Online since: September 2014
Authors: Adulhalim Shah Maulud, Amir Sada Khan, Chong Fai Kait, Zakaria Man, Mohamad Azmi Bustam Khalil
But the crystalline cellulose has a super molecular structure and has strong network of of intra- and intermolecular hydrogen bonds which make the conversion of cellulose into LA limited.
The effect of ball milling on the structure of cellulose was first investigated, followed by conversion behavior of ball milled cellulose into LA.
The decrease in the patricle size of cellulose is due to the breake down of long chain cellulose polymer into less and amorphous structure.
Kuznetsov, "Production of levulinic acid from wood raw material in the presence of sulfuric acid and its salts," Chemistry of natural compounds, vol. 34, pp. 182-185, 1998
Heeres, "Kinetic study on the acid-catalyzed hydrolysis of cellulose to levulinic acid," Industrial & engineering chemistry research, vol. 46, pp. 1696-1708, 2007
The effect of ball milling on the structure of cellulose was first investigated, followed by conversion behavior of ball milled cellulose into LA.
The decrease in the patricle size of cellulose is due to the breake down of long chain cellulose polymer into less and amorphous structure.
Kuznetsov, "Production of levulinic acid from wood raw material in the presence of sulfuric acid and its salts," Chemistry of natural compounds, vol. 34, pp. 182-185, 1998
Heeres, "Kinetic study on the acid-catalyzed hydrolysis of cellulose to levulinic acid," Industrial & engineering chemistry research, vol. 46, pp. 1696-1708, 2007
Online since: January 2012
Authors: Qiang Wang, Zhuan Ni Yu, Liang Min Yu
Synthesis and Antifouling Capability of New Mixture Ratio Coating Containing Methoxysilane Moiety
Qiang Wang1a,Zhuan ni Yu1b,Liangmin Yu2a
1 College of chemistry and pharmaceutical, Qingdao Agriculture University
Qingdao, 266109, PR China
2 College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, PR China
1a e-mail: oceanwq@yahoo.cn; 1b e-mail: fxhx2006@sohu.com; 2ae-mail: yuyan@ouc.edu.cn
Keywords: Acrylic-silane resin ; synthesis; antifouling properties; coatings
Abstract.
In this paper, a novel coating containing methoxysilane and acrylic resin were synthesized which have special structure to antifouling.
On the other hand, the acrylic resin copolymerized AM changed the micro-structure of surface which had killing bacteria property.
CHB-1,CHB-2 and CHB-3 had similar anti-alga property, because they had similar structure and antiflant.
To be kept in mind, the identification of these coatings with antifouling properties requires a wide range of expertise field of biology as well as chemistry.
In this paper, a novel coating containing methoxysilane and acrylic resin were synthesized which have special structure to antifouling.
On the other hand, the acrylic resin copolymerized AM changed the micro-structure of surface which had killing bacteria property.
CHB-1,CHB-2 and CHB-3 had similar anti-alga property, because they had similar structure and antiflant.
To be kept in mind, the identification of these coatings with antifouling properties requires a wide range of expertise field of biology as well as chemistry.
Online since: October 2014
Authors: Wu Kui Luo, Mei Zhen Zhou, Shao Ming Ying
Synthesis and characterization of manganese phosphate aluminosilicate molecular sieve
Wu-Kui Luo1, a *, Shao-Ming Ying1,b, Mei-Zhen Zhou1,c
Department of Chemistry, Ningde Normal University, Ningde 352100, China.
However, due to the catalytic process, if the cell structure using a molecular sieve catalyst, can improve the selectivity to light olefins, but in the reaction process to reduce catalytic performance, shorter life; large pore molecular sieve catalysts used in the structure, its service life can be extended, but it will reduce the selectivity of light olefins.
Transition Metal Chemistry, 2009, 34(8):943-947
Inorganic Chemistry, 2012, 51, 2432-2437
Structure−Property Relationships of Inorganically Surface-Modified Zeolite Molecular Sieves for Nanocomposite Membrane Fabrications[J].
However, due to the catalytic process, if the cell structure using a molecular sieve catalyst, can improve the selectivity to light olefins, but in the reaction process to reduce catalytic performance, shorter life; large pore molecular sieve catalysts used in the structure, its service life can be extended, but it will reduce the selectivity of light olefins.
Transition Metal Chemistry, 2009, 34(8):943-947
Inorganic Chemistry, 2012, 51, 2432-2437
Structure−Property Relationships of Inorganically Surface-Modified Zeolite Molecular Sieves for Nanocomposite Membrane Fabrications[J].
Online since: July 2012
Authors: Bao Jun Li, Cheng Wei Li, Xiao Hong Tang
Rice Straw and Rice Straw Ash as Precursor for Synthesis of Mesoporous Molecular Sieves MCM-41
Xiaohong Tang1, a, Baojun Li2, b and Chengwei Li1, c
1Department of Chemistry, Henan Institute of Education, Zhengzhou 450046, P R China
2Department of Chemistry, Zhengzhou University, Zhengzhou 450001, P R China
atxhxw@126.com, blbjfcl@zzu.edu.cn, clcwli@126.com
Keywords: Rice straw, Rice straw ash, MCM-41
Abstract.
The isotherm curve belongs to the type IV (IUPAC), which indicates that MCM-41 possess a typical mesoporous molecular sieve structures (Fig. 3a).
The distributions of pore diameter are concentrated in the range of typical mesoporous structures (Fig. 3b).
This high specific surface area, pore diameter and total pore volumes should be attributed to the typical mesoporous structures of MCM-41.
Yu: Molecular Sieve and Chemistry of Porous Materials, Science Press (Beijing), pp.135-137, 2004 (in Chinese)
The isotherm curve belongs to the type IV (IUPAC), which indicates that MCM-41 possess a typical mesoporous molecular sieve structures (Fig. 3a).
The distributions of pore diameter are concentrated in the range of typical mesoporous structures (Fig. 3b).
This high specific surface area, pore diameter and total pore volumes should be attributed to the typical mesoporous structures of MCM-41.
Yu: Molecular Sieve and Chemistry of Porous Materials, Science Press (Beijing), pp.135-137, 2004 (in Chinese)
Online since: January 2020
Authors: G. M. Kurunina, O.M. Ivankina, G. M. Butov
When producing a supported catalyst, one can control the size and structure of metal particles [19-22].
Photomicrographs (SEM) of 1%Pt/Sm2O3 (а), 1%Pt/Tb2O3 (b), 1%Pt/Yb2O3 (c) catalyst structures.
Scanning electron microscopy was used to study the surface structure of the obtained 1% Pt/Sm2O3 (Tb2O3, Yb2O3) catalysts.
Suresh, et al., Tailoring the synthesis of supported Pd catalysts towards desired structure and size of metal particles, Physical Chemistry Chemical Physics, 12(18) (2010) 4833-4842
Meille, Review on methods to deposit catalysts on structured surfaces, Applied Catalysis A: General, 315 (2006) 1-17
Photomicrographs (SEM) of 1%Pt/Sm2O3 (а), 1%Pt/Tb2O3 (b), 1%Pt/Yb2O3 (c) catalyst structures.
Scanning electron microscopy was used to study the surface structure of the obtained 1% Pt/Sm2O3 (Tb2O3, Yb2O3) catalysts.
Suresh, et al., Tailoring the synthesis of supported Pd catalysts towards desired structure and size of metal particles, Physical Chemistry Chemical Physics, 12(18) (2010) 4833-4842
Meille, Review on methods to deposit catalysts on structured surfaces, Applied Catalysis A: General, 315 (2006) 1-17
Online since: May 2016
Authors: Mat Taib Razaina, Dody Ariawan, Zainal Arifin Mohd Ishak
Such modifications resulted in some changes to to the fiber surface morphology [1-3] as well as chemistry [1,3,4] and also the fiber strength and stiffness [5].
The surface structure of the untreated kenaf fiber (Fig. 1(a)) showed randomly distributed of smooth bumps of variable dimensions.
In contrast, topographic images of kenaf fibers after 3, 4 and 5 h of treatment showed different surface structures.
Instead of bumps a more organized scale-like structures were observed on the fiber surfaces.
Matuana, Surface chemistry changes of weathered HDPE/wood-flour composites studied by XPS and FTIR spectroscopy, Polym.
The surface structure of the untreated kenaf fiber (Fig. 1(a)) showed randomly distributed of smooth bumps of variable dimensions.
In contrast, topographic images of kenaf fibers after 3, 4 and 5 h of treatment showed different surface structures.
Instead of bumps a more organized scale-like structures were observed on the fiber surfaces.
Matuana, Surface chemistry changes of weathered HDPE/wood-flour composites studied by XPS and FTIR spectroscopy, Polym.