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Online since: September 2013
Authors: Irina Shushina, Jian Hua Ran, Felix Telegin, Viktoriia Priazhnikova
China, Wuhan Textile University
2,3,4Engels Ave 7, Ivanovo, 153000, Russia, Ivanovo State University of Chemistry and Technology
aemail: jeanne1185@gmail.com, bemail: shysha22@mail.ru, cemail: prajnikova@mail.ru, demail: felix.telegin@gmail.com
Keywords: Acid dyes, mordant dyes, Fenton reaction, catalysis, inhibition, Fe-complex formation.
Introduction Fenton reaction and advanced oxidation process for destruction of textile dyes are the subjects of great amount of research papers, dealing with chemistry and mechanism of reaction as well as development of advanced technology of dye destruction in effluents.
Destruction of mordant dyes is of great interest for chemistry and technology of dyeing of textile as far as mordant dyes are widely used for producing dyeings of high performance with high fastness to washing and light [1].
Another dye 4 is destroyed with about the same rate as usual acid dye 2 of similar structure, k=1,70x10-1 / min-1.
References [1] Colorants and Auxiliaries: Organic Chemistry and Application Properies.
Introduction Fenton reaction and advanced oxidation process for destruction of textile dyes are the subjects of great amount of research papers, dealing with chemistry and mechanism of reaction as well as development of advanced technology of dye destruction in effluents.
Destruction of mordant dyes is of great interest for chemistry and technology of dyeing of textile as far as mordant dyes are widely used for producing dyeings of high performance with high fastness to washing and light [1].
Another dye 4 is destroyed with about the same rate as usual acid dye 2 of similar structure, k=1,70x10-1 / min-1.
References [1] Colorants and Auxiliaries: Organic Chemistry and Application Properies.
Online since: December 2012
Authors: Bo Wen Cheng, Lei Xia, Peng Xi
Study of Irradiation Hydrophilic Modification of Polypropylene Meltblown Nonwovens
Lei Xia1,2,a, Peng Xi3,4,b, Bowen Cheng1,2,3,c
1School of Textile, Tianjin Polytechnic University, Tianjin 300160, China
2Key Laboratory of Advanced Textile Composites, Ministry of Education of China, Tianjin 300160, China
3Tianjin Multicipal Kay Lab of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin 300160, China
4State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry Chinese Academy of Sciences, Beijing 100080, China
axia1983@163.com, bxipeng@tjpu.edu.cn, cbowen@tjpu.edu.cn
Keywords: Polypropylene, Irradiation Grafting, Hydrophilic, Meltblown Nonwovens.
Because the macromolecular structure of polypropylene doesn’t contain the hydrophilic group, the cross-section of the fiber is a circular and compact shape which is lack of pores and crevices, the hydrophilicity of the polypropylene nonwovens is extremely terrible [6-8].
Radiation Physics and Chemistry, 2000, 57(5):179-186
Radiation Physics and Chemistry, 2001, 60(3):495-502.
Because the macromolecular structure of polypropylene doesn’t contain the hydrophilic group, the cross-section of the fiber is a circular and compact shape which is lack of pores and crevices, the hydrophilicity of the polypropylene nonwovens is extremely terrible [6-8].
Radiation Physics and Chemistry, 2000, 57(5):179-186
Radiation Physics and Chemistry, 2001, 60(3):495-502.
Online since: September 2015
Authors: K.Y. Sandhya, S.M.Y. Mohamed Mukthar Ali
Sandhya1, b*
1 Department of Chemistry, Indian Institute of Space Science & Technology, India
asmymukthar@gmail.com, bsandhya@iist.ac.in
Keywords:TiO2-MoS2; Visible light; Solvothermal; NMP; Photodegradation.
Geim, Fine structure constant defines visual transparency of graphene, Science 320 (2008) 1308
Highly dispersive {001} facets-exposednanocrystalline TiO2 on high quality graphene as a high performance photocatalyst, Journal of Material Chemistry 22 (2012) 7484-7491
Physical, Chemistry Chemical Physics 15(2013) 12963-12970
Journal of Physical Chemistry C, 115 (2011) 23718-23725
Geim, Fine structure constant defines visual transparency of graphene, Science 320 (2008) 1308
Highly dispersive {001} facets-exposednanocrystalline TiO2 on high quality graphene as a high performance photocatalyst, Journal of Material Chemistry 22 (2012) 7484-7491
Physical, Chemistry Chemical Physics 15(2013) 12963-12970
Journal of Physical Chemistry C, 115 (2011) 23718-23725
Online since: May 2006
Authors: Leif Hermansson, Jesper Lööf, Hakan Engqvist, Adam Faris, Mikael Ottosson
In Vitro Bioactivity of Injectable Ceramic Orthopaedic Cements
Adam Faris1, Håkan Engqvist1, 2
, Jesper Lööf1, 2, Mikael Ottosson
3
,
Leif Hermansson1, 2
1
Department of Materials Science, Angstrom Laboratory, Uppsala University, Box 534, 751 21
Uppsala, Sweden
2
Doxa AB, Axel Johanssons gata 4-6, 754 51 Uppsala, Sweden
3Materials Chemistry, Angstrom Laboratory, Uppsala University, Box 538, 751 21 Uppsala,
Sweden
adam@faris.se, hakan.engqvist@angstrom.uu.se, jesper.loof@doxa.se
mikael.ottosson@mkem.uu.se, , leif.hermansson@doxa.se
Keywords: Orthopaedic cements, bioactivity, surface analysis
Abstract The objective of this paper is to investigate and compare the in vitro bioactivity of three
injectable cements for orthopaedic applications.
This originates from differences in the setting chemistry, where the calcium silicates and aluminates bond much higher amounts of water than the calcium phosphates do, giving less porosity and thus potentially higher strength of the hardened body.
The structure and appearance of the films changed with longer storage time, although the film thickness was established early in the process.
Thin-film XRD of the surfaces after 7 days of storage. 30 40 26 50 CA CP CS Discussion The in vitro bioactivity of calcium phosphate cement is undisputable and naturally given by its material formulation and reaction chemistry.
Although this is not exactly the same reactive phase as in this study, the hydration reaction chemistry is similar.
This originates from differences in the setting chemistry, where the calcium silicates and aluminates bond much higher amounts of water than the calcium phosphates do, giving less porosity and thus potentially higher strength of the hardened body.
The structure and appearance of the films changed with longer storage time, although the film thickness was established early in the process.
Thin-film XRD of the surfaces after 7 days of storage. 30 40 26 50 CA CP CS Discussion The in vitro bioactivity of calcium phosphate cement is undisputable and naturally given by its material formulation and reaction chemistry.
Although this is not exactly the same reactive phase as in this study, the hydration reaction chemistry is similar.
Online since: April 2014
Authors: A.M. Frolov, I.A. Tkachenko, V.P. Morozova, Vladimir S. Rudnev, I.V. Lukiyanchuk, M.V. Adigamova, Peter V. Kharitonskii, A.Y. Ustinov, Sergey A. Boev
Sukhanova 8, 690950 Vladivostok, Russia
3 Institute of Chemistry, Far East Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, 690022 Vladivostok, Russia
ae-mail: peterkh@yandex.ru, be-mail: froloff5@yandex.ru
Keywords: magnetic particles, magnetization, magnetostatic interactions, magnetic moment, superparamagnetism, iron oxides, iron-containing coatings, plasma-electrolytic oxidation.
Consequently, the magnetization of dispersed in the amorphous coating clusters, which are the systems of interacting particles, or hetero-structures will be determined by the grains, for which the Let's observe weakly magnetic particle (phase), that has a stable magnetic moment, for example, goethite Ms ~ 5 G or hydrogoethite Ms ~ 0.5 G.
Sergienko, Doklady Physical Chemistry, 428 (2009) 189
Morozova, Protection of Metals and Physical Chemistry of Surfaces, 46 (5) (2010) 566
Frolov, Russian Journal of Physical Chemistry A, 87 (6) (2013) 1052
Consequently, the magnetization of dispersed in the amorphous coating clusters, which are the systems of interacting particles, or hetero-structures will be determined by the grains, for which the Let's observe weakly magnetic particle (phase), that has a stable magnetic moment, for example, goethite Ms ~ 5 G or hydrogoethite Ms ~ 0.5 G.
Sergienko, Doklady Physical Chemistry, 428 (2009) 189
Morozova, Protection of Metals and Physical Chemistry of Surfaces, 46 (5) (2010) 566
Frolov, Russian Journal of Physical Chemistry A, 87 (6) (2013) 1052
Online since: June 2014
Authors: Jie Wu, Chun Zhang
Ir/AlO(OH)/Fe3O4: A high active and selective catalyst for Hydrogenation of p-choronitrobenzene to p-chloroaniline
Jie Wu1, a*, Chun Zhang2,b
1Vocational and technical college, China West Normal University, Nanchong 637002, China
2 Chemical Synthesis and pollution control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637009, China
axiaowulaoshi@126.com, b chunzhang@163.com
* Corresponding author
Keywords: p-choronitrobenzene; p-chloroaniline; hydrogenation; magnetic catalyst
Abstract.
Introduction Hydrogenation of chloronitrobenzenes to chloroanilines is of great concern in synthetic chemistry since chloroanilines are important chemicals which are widely applied as end products or intermediates for producing herbicides, dyes, drugs, pesticides and fine chemicals[1, 2].
It can be seen that the intensive bands at 3442 cm-1 was blonged to the vas(Al)O-H stretching vibrations and the band at 1065 cm-1 was assigned to the δsAl-O-H mode of boehmite, respectively, indicating that the pre-prepared catalyst contained large amount of hydroxyl groups and structure water and can be dispersed well in ethanol/water mixture[8].
Xu, Green Chemistry, Vol.9 (2007),p. 849 [5] F.
Ma, Green Chemistry, Vol.13 (2011),p. 1238 [6] G.
Introduction Hydrogenation of chloronitrobenzenes to chloroanilines is of great concern in synthetic chemistry since chloroanilines are important chemicals which are widely applied as end products or intermediates for producing herbicides, dyes, drugs, pesticides and fine chemicals[1, 2].
It can be seen that the intensive bands at 3442 cm-1 was blonged to the vas(Al)O-H stretching vibrations and the band at 1065 cm-1 was assigned to the δsAl-O-H mode of boehmite, respectively, indicating that the pre-prepared catalyst contained large amount of hydroxyl groups and structure water and can be dispersed well in ethanol/water mixture[8].
Xu, Green Chemistry, Vol.9 (2007),p. 849 [5] F.
Ma, Green Chemistry, Vol.13 (2011),p. 1238 [6] G.
Online since: February 2008
Authors: Ming Hao Fang, Zhao Hui Huang, Yan Gai Liu, Xiao Xian Wu, Jun Tong Huang
The
chemistry composition (mass fraction) was: 61.25%SiO2, 7.80%Al2O3, 12.77%Fe2O3, 1.45%TiO2,
6.68%CaO, 0.55%MgO, 1.22%K2O, 0.55%Na2O, 0.81%P2O3, 0.33%SO3, 0.07%loss.
The chemistry composition of mild-clay (Tangshan) was: 59.76%SiO2, 16.39%Al2O3, 2.95%Fe2O3, 0.74%TiO2, 0.83%CaO, 0.95%MgO, 1.71%K2O, 0.098%Na2O, 9.86%loss.
The chemistry composition of high aluminum fly ash (Mengxi Thermoelectricity Plant) was: 41.20%Al2O3, 48.49%SiO2, 3.37%Fe2O3, 1.30%TiO2, 3.31%CaO, 0.20%MgO, 0.013%MnO, 2.12%loss.
High aluminum fly ash was a kind of solid waste with certain chemistry activity.
Fig.6 showed that the structure of sample I was dense, had a few porosity and surface damage.
The chemistry composition of mild-clay (Tangshan) was: 59.76%SiO2, 16.39%Al2O3, 2.95%Fe2O3, 0.74%TiO2, 0.83%CaO, 0.95%MgO, 1.71%K2O, 0.098%Na2O, 9.86%loss.
The chemistry composition of high aluminum fly ash (Mengxi Thermoelectricity Plant) was: 41.20%Al2O3, 48.49%SiO2, 3.37%Fe2O3, 1.30%TiO2, 3.31%CaO, 0.20%MgO, 0.013%MnO, 2.12%loss.
High aluminum fly ash was a kind of solid waste with certain chemistry activity.
Fig.6 showed that the structure of sample I was dense, had a few porosity and surface damage.
Online since: May 2006
Authors: Rogerio Colaço, Eduardo Pires, Tânia Costa, Ana Paula Serro
Previous works have shown that irradiation sterilization can change the color
of some bioceramics [2] (which can be an indication of modifications of their physical, chemical
and mechanical properties), can modify the structure of biopolymers (crosslinking and degradation)
[1], can influence the wettability of titanium implants [3] and, finally can influence the setting
reaction and mechanical properties of apatite cements [4].
In order to retrieve information of the surface chemistry of the samples, X-ray photoelectron spectroscopy (XPS) was performed with a MgKα anodic X-ray source, operating at 15 KeV.
These XPS results indicate that sterilization with γ-irradiation induces some modifications in the surface chemistry, most probably the formation of an oxidized layer, which is responsible for the observed change of coloration of the HAp coatings.
In order to evaluate if this change in the surface chemistry induced by irradiation has any effect on the wettability behaviour of HAp coatings, water contact angle measurements were performed by the sessile drop method.
The obtained results showed that the sterilization process induces changes in the surface chemistry of the more external layer of the surfaces, detected by XPS analysis and wettability measurements, which results in a slight modification of the color of the sterilized samples.
In order to retrieve information of the surface chemistry of the samples, X-ray photoelectron spectroscopy (XPS) was performed with a MgKα anodic X-ray source, operating at 15 KeV.
These XPS results indicate that sterilization with γ-irradiation induces some modifications in the surface chemistry, most probably the formation of an oxidized layer, which is responsible for the observed change of coloration of the HAp coatings.
In order to evaluate if this change in the surface chemistry induced by irradiation has any effect on the wettability behaviour of HAp coatings, water contact angle measurements were performed by the sessile drop method.
The obtained results showed that the sterilization process induces changes in the surface chemistry of the more external layer of the surfaces, detected by XPS analysis and wettability measurements, which results in a slight modification of the color of the sterilized samples.
Online since: September 2013
Authors: Liang Fa Gong, Qi Qun Cao, Jia Wen, Ming Lan Ge, Hua Rong
Abstract: The structures, stabilities, and bonding features of neutral M(η5-P5)2 (M = Fe, Ru, and Os) and cationic M(η5-P5)+ have been investigated using density functional theory (DFT) (hybrid B3LYP and pure BP86 methods).
The eclipsed (D5h) structure has been predicted to be the global minimum for this triad bis(pentaphospholyl) metallocenes, and the staggered (D5d) structure to be the rotational transition state.
Introduction The chemistry of metal sandwich complexes has developed intensively since the discovery of ferrocene, Fe(η5-C5H5)2[1,2].
The sandwich [Ti(η5-P5)2]2- was synthesized and characterized in 2002 by Urnezius et al.[3], and the structures and bonding of the analogues of ferrocene, Fe(η5-E5)2 (E = N, P, As, Sb) have been revealed theoretically by Frunzke et al.[4].
The structures of neutral metal dibenzene complexes, M(C6H6)2 (M = Sc - Zn) have been investigated theotretically by Il Seung Youn et al using Møller Plesset second order perturbation theory (MP2) [7].
The eclipsed (D5h) structure has been predicted to be the global minimum for this triad bis(pentaphospholyl) metallocenes, and the staggered (D5d) structure to be the rotational transition state.
Introduction The chemistry of metal sandwich complexes has developed intensively since the discovery of ferrocene, Fe(η5-C5H5)2[1,2].
The sandwich [Ti(η5-P5)2]2- was synthesized and characterized in 2002 by Urnezius et al.[3], and the structures and bonding of the analogues of ferrocene, Fe(η5-E5)2 (E = N, P, As, Sb) have been revealed theoretically by Frunzke et al.[4].
The structures of neutral metal dibenzene complexes, M(C6H6)2 (M = Sc - Zn) have been investigated theotretically by Il Seung Youn et al using Møller Plesset second order perturbation theory (MP2) [7].
Online since: June 2022
Authors: Nishant Shukla, Pawan Chetri, Gazi A. Ahmed
Structural properties
Sb2Te3 in its conventional cell form is a hexagonal structure and its primitive cell is a rhombohedral(R-3m) structure as shown in Fig. 1.
Fig. 4 Band structure of a 3QL Antimony Telluride.
Carey, The electronic structure of the antimony chalcogenide series: Prospects for optoelectronic applications, Journal of Solid State Chemistry 213 (2014) 116-125
Krause, Refinement of the Sb2Te3 and Sb2Te2Se structures and their relationship to nonstoichiometric Sb2Te3− ySey compounds, Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry, 30(5) (1974) 1307-1310
Goddard III, Accurate Ab initio quantum mechanics simulations of Bi2Se3 and Bi2Te3 topological insulator surfaces, The journal of physical chemistry letters 6(19) (2015) 3792-3796.
Fig. 4 Band structure of a 3QL Antimony Telluride.
Carey, The electronic structure of the antimony chalcogenide series: Prospects for optoelectronic applications, Journal of Solid State Chemistry 213 (2014) 116-125
Krause, Refinement of the Sb2Te3 and Sb2Te2Se structures and their relationship to nonstoichiometric Sb2Te3− ySey compounds, Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry, 30(5) (1974) 1307-1310
Goddard III, Accurate Ab initio quantum mechanics simulations of Bi2Se3 and Bi2Te3 topological insulator surfaces, The journal of physical chemistry letters 6(19) (2015) 3792-3796.