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Online since: November 2012
Authors: Rui Yuan Zheng, Wan Yi Liu, Xia Zheng, Bing Li, Zheng Wang, Jing Xin Ma, Ning Liu
Preparation and Characterization of Magenetically Core-shell Structure Carbon Based Solid Sulfonic Acid
Ning Liu1, Ruiyuan Zheng1, Wanyi Liu1,a, Jinxin Ma1, Xia Zhang1, Bing li1
and Zheng Wang1,b
1College of chemistry and Chemical Engineering, Ningxia University,Yinchuan 750021,China
a liuwy@nxu.edu.cn; b wzheng@nxu.edu.cn
Keywords: Magnetic core-shell carbon based solid acid, Sulfonation ,Preparation, Characterization
Abstract: Magnetic core-shell structure carbon based solid sulfonic acid was prepared and characterized systematically.
The structure, morphology and ferromagnetic property of ferrite powders and composites were characterized by XPS, TEM, FTIR spectra and VSM, respectively.
The advantages, including high acidic concentration and magnetically active, are potentially important for industrial applications of the Core-shell Structure Carbon Based Solid Sulfonic Acid as an efficient heterogeneous solid acid catalyst in the future.
In this work, carbon based solid sulfonic acid with unique magenetic core-shell structure and high acid concentration were prepared by a rapid and cheap immobilization technique.
The structure, morphology and ferromagnetic property of ferrite powders and composites were characterized by XPS, TEM, FTIR spectra and VSM, respectively.
The advantages, including high acidic concentration and magnetically active, are potentially important for industrial applications of the Core-shell Structure Carbon Based Solid Sulfonic Acid as an efficient heterogeneous solid acid catalyst in the future.
In this work, carbon based solid sulfonic acid with unique magenetic core-shell structure and high acid concentration were prepared by a rapid and cheap immobilization technique.
Online since: September 2013
Authors: Mi Yan, Kun Ming Qian, Song Ji, Jie Hao, Ang Ding, Yan Song Zhang, Ming Li Li, Jing Hui Huang
The magnetic loss increases remarkably when work temperatures are exceed the Tmax, the structure and chemistry of the grain boundaries (GBs) should provide a strong influence on Hc [16-19], which prevent the future application of the magnets, and a number of investigations attempted to correlate the GB structure/chemistry and Hc [18, 19].
The physics properties and structure of magnets were measure with different morphology as shown in Fig. 1c.
After the annealing, the structure had changed enormously.
Discussion The structures have strong effect on the magnetic property of the permanent magnets.
Ma: Materials Chemistry and Physics Vol. 113 (2009), p. 764 [11] Y.H.
The physics properties and structure of magnets were measure with different morphology as shown in Fig. 1c.
After the annealing, the structure had changed enormously.
Discussion The structures have strong effect on the magnetic property of the permanent magnets.
Ma: Materials Chemistry and Physics Vol. 113 (2009), p. 764 [11] Y.H.
Online since: September 2007
Authors: Peng Chao Kang, Zi Yang Xiu, Chun Yu Wang, Yun He Zhang, Guo Qin Chen, Gaohui Wu
The nickel is face-centre cubic
structure and coordination number 12, the lattice parameter A= 0.1352 nm.
If it had non-intact face-centred cubic structure, it would be the same as liquid-like structure-non-crystal, because the grains size of Ni-P is very small.
The structure of alloys from crystal to non-crystal along with quantity of component phosphor, that law as: crystal → crystal + crystallite → crystallite → crystallite + non-crystal → non-crystal [11].
(2) The X-Ray Diffraction (XRD) proved that the main phases on the coatings were aluminum and amorphous structure Ni-P alloys
Morgiel: Materials Chemistry and Physics Vol. 81 (2003), p. 319-322 [4] Y.
If it had non-intact face-centred cubic structure, it would be the same as liquid-like structure-non-crystal, because the grains size of Ni-P is very small.
The structure of alloys from crystal to non-crystal along with quantity of component phosphor, that law as: crystal → crystal + crystallite → crystallite → crystallite + non-crystal → non-crystal [11].
(2) The X-Ray Diffraction (XRD) proved that the main phases on the coatings were aluminum and amorphous structure Ni-P alloys
Morgiel: Materials Chemistry and Physics Vol. 81 (2003), p. 319-322 [4] Y.
Online since: September 2017
Authors: Mohamad Nurul Azman Mohammad Taib, Sharifah Bee O.A. Abdul Hamid, Nurhidayatullaili Muhd Julkapli, Wageeh Abdulhadi Yehye
The Field Emission Scanning Microscopy (FESEM) was used to study the structures and surfaces of the NCC and composites produced.
In this paper, we reported NBR reinforced with NCC at low loading level and studied the morphological structure properties.
Fig 2(a) shows the structure of MCC observed by FESEM.
Fig. 1 Tensile strength of NBR and NBR/NCC composite films (b) (d) (c) (a) Fig. 2(a) FESEM of Micro crystalline (MCC) structure (1000x); (b) Nano crystalline (NCC) structure (500x); (c) MCC structure (5000x); (d) NCC structure (5000x) From Fig. 3 shows that the NBR that act as a control sample, it shows a clean and smooth surface with some element probably from the accelerator.
Tam, Chemistry and applications of nanocrystalline cellulose and its derivatives: A nanotechnology perspective, CAN J CHEM ENG, 89(2011), 1191-1206
In this paper, we reported NBR reinforced with NCC at low loading level and studied the morphological structure properties.
Fig 2(a) shows the structure of MCC observed by FESEM.
Fig. 1 Tensile strength of NBR and NBR/NCC composite films (b) (d) (c) (a) Fig. 2(a) FESEM of Micro crystalline (MCC) structure (1000x); (b) Nano crystalline (NCC) structure (500x); (c) MCC structure (5000x); (d) NCC structure (5000x) From Fig. 3 shows that the NBR that act as a control sample, it shows a clean and smooth surface with some element probably from the accelerator.
Tam, Chemistry and applications of nanocrystalline cellulose and its derivatives: A nanotechnology perspective, CAN J CHEM ENG, 89(2011), 1191-1206
Structural Studies of Potassium Hexatitanates Prepared under Hydrothermal and Solid State Conditions
Online since: June 2006
Authors: Z. Aiyub, Rosiyah Yahya, A. Hassan
Aiyub
Dept. of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Email, rosiyah@um.edu.my
Keywords: potassium hexatitanate; hydrothermal; solid state, FTIR, XRD
Abstract, The structural studies of potassium hexatitanates prepared under both hydrothermal and
solid state conditions were carried out.
Fourier Transform Infra-red spectroscopy (FTIR) results revealed that potassium hexatitanate structure consisted of TiO6 octahedral units irrespective of the preparative conditions and particle size.
X-ray diffraction (XRD) results showed that the only potassium hexatitanate phase was detectable and the structure is of the Wadsley-type consisting of chains of Ti-O octahedral sharing edges with tunnels in which the potassium ions are located.
Scanning electron microscopy was also employed to study its surface structure and morphology while X-ray diffraction was used to determine and compare the crystallinity of the potassium hexatitanate structure prepared by the different methods.
Conclusions The FTIR results revealed that potassium hexatitanates prepared under both hydrothermal and solid state conditions consists of TiO6 octahedral units in the potassium hexatitanate structure and this is confirmed by the XRD results.
Fourier Transform Infra-red spectroscopy (FTIR) results revealed that potassium hexatitanate structure consisted of TiO6 octahedral units irrespective of the preparative conditions and particle size.
X-ray diffraction (XRD) results showed that the only potassium hexatitanate phase was detectable and the structure is of the Wadsley-type consisting of chains of Ti-O octahedral sharing edges with tunnels in which the potassium ions are located.
Scanning electron microscopy was also employed to study its surface structure and morphology while X-ray diffraction was used to determine and compare the crystallinity of the potassium hexatitanate structure prepared by the different methods.
Conclusions The FTIR results revealed that potassium hexatitanates prepared under both hydrothermal and solid state conditions consists of TiO6 octahedral units in the potassium hexatitanate structure and this is confirmed by the XRD results.
Online since: October 2011
Authors: Ya Lin Ren, Yan Jun Cong, Cun She Chen
Synthesis and Activity Determination of Angiotensin Converting Enzyme Inhibitors Derived from αs1-casein Protein
Ren Yalin1,a,Cong Yanjun2,b,Chen Cunshe2,c
1Chemical and Environmental Engineering Beijing Key Laboratory of Flavor Chemistry Beijing Technology and Business University Beijing, China
2Chemical and Environmental Engineering Beijing Key Laboratory of Flavor Chemistry Beijing Technology and Business University Beijing, China
arenyalin110@yahoo.com.cn,bcongyj@th.btbu.edu.cn, cchencs@th.btbu.edu.cn
Keywords:Angiotensin-converting enzyme inhibitor(ACEI); tripeptide; Solid-phase synthesis; HPLC
Abstract.A lot of peptides were synthesized on the basis of the sequence of αs1-casein.
Angiotensin-converting enzyme inhibitors (ACEI) with the better biological activity were screened and their structure-activity relationship was studied.
Conclusion In this paper, the structure-activity relationship of milk-derived antihypertensive peptides is determined by comprehensive study, involving of hydrophobic amino acid, proline and N-terminal amino acid in the primary structure.
Angiotensin-converting enzyme inhibitors (ACEI) with the better biological activity were screened and their structure-activity relationship was studied.
Conclusion In this paper, the structure-activity relationship of milk-derived antihypertensive peptides is determined by comprehensive study, involving of hydrophobic amino acid, proline and N-terminal amino acid in the primary structure.
Online since: March 2013
Authors: Mi Ouyang, Bin Hu, Xiao Jing Lv, Cheng Zhang, Jun Huang
Atmospheric Pressure Synthesis of ZnO Nanotubes by Aqueous Solution Route
Jun Huanga, Xiaojing Lvb, Mi Ouyang*, Bin Huc, Cheng Zhang*
State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, P.
X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) equipped with the selected area electron diffraction (SAED) setup were used to analyze the crystal structure, surface morphology and inner structure of ZnO nanotubes.
The crystal structure was characterized by X-ray diffraction (XRD, X'Pert Pro, PANalytical) with Cu Kα radiation.
All the results further demonstrated that the obtained structure had a wurtzite hexagonal phase.
Tong, et al, Electrochemical growth and control of ZnO dendritic structures, J.
X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) equipped with the selected area electron diffraction (SAED) setup were used to analyze the crystal structure, surface morphology and inner structure of ZnO nanotubes.
The crystal structure was characterized by X-ray diffraction (XRD, X'Pert Pro, PANalytical) with Cu Kα radiation.
All the results further demonstrated that the obtained structure had a wurtzite hexagonal phase.
Tong, et al, Electrochemical growth and control of ZnO dendritic structures, J.
Online since: June 2014
Authors: Qiang Xu, Yoshiyuki Kojima, Naoki Toyama, Tetsuo Umegaki, Shunsuke Imamura
The results indicate that hollow structure plays important role to show high activity.
1.
We have focused on hollow spheres to reveal the relation between structure of solid acid or catalyst and catalytic activity for hydrolysis of NH3BH3 [4, 6, 8, 9].
From Figure 1a, the spherical particles of ca. 200-300 nm in diameter with hollow structure were obtained by preparation using L(+)-arginine, and the wall thickness is around 30.0 nm.
The spherical particles of ca. 200-300 nm in diameter with hollow structure were obtained by preparation with ammonia, and the wall thickness is around 5.0 nm (Figure 1b).
The results indicate that hollow structure plays important role to show high activity.
We have focused on hollow spheres to reveal the relation between structure of solid acid or catalyst and catalytic activity for hydrolysis of NH3BH3 [4, 6, 8, 9].
From Figure 1a, the spherical particles of ca. 200-300 nm in diameter with hollow structure were obtained by preparation using L(+)-arginine, and the wall thickness is around 30.0 nm.
The spherical particles of ca. 200-300 nm in diameter with hollow structure were obtained by preparation with ammonia, and the wall thickness is around 5.0 nm (Figure 1b).
The results indicate that hollow structure plays important role to show high activity.
Online since: December 2011
Authors: Zhi Hua Zhou, Bo Li, Jing Cao, Li Hua Liu
Modification of Fly Ash by Sodium Tetraethylenepentamine-multi Dithiocarbamate and its Removing Performance towards Cu(II)
Lihua Liu1,a, Bo Li 1.b, Jing Cao 1.c, Zhihua Zhou1,d
1Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education and Hunan Province, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan Province, P.R.China
aemail: liulihualj@sina.com.cn, llh213@163.com, bemail: 364390063@qq.com, cemail:caojing702@163.com; demail: zhou7381@126.com
Keywords: Modified fly ash, Copper wastewater, Removal rate, Sedimentation rate, Stability
Abstract.
The structure of MFA was characterized by FTIR, and the morphology was observed by using scanning electron microscope (SEM).
In this study, a modified fly ash (MFA) was prepared from fly ash (FA) and tetraethylenepentamine-multi dithiocarbamate (TEPAMDT), its structure was characterized by FTIR, and the morphology was observed by using scanning electron microscope (SEM).
The amorphous phase can take place the pozzolanic reaction with the hydrates of alkali metal alkaline earth metal in the present of water, leading to it dissolving to decompose the network structures of Si-O and Al-O [8].
This structure is beneficial for metal ions adsorption.
The structure of MFA was characterized by FTIR, and the morphology was observed by using scanning electron microscope (SEM).
In this study, a modified fly ash (MFA) was prepared from fly ash (FA) and tetraethylenepentamine-multi dithiocarbamate (TEPAMDT), its structure was characterized by FTIR, and the morphology was observed by using scanning electron microscope (SEM).
The amorphous phase can take place the pozzolanic reaction with the hydrates of alkali metal alkaline earth metal in the present of water, leading to it dissolving to decompose the network structures of Si-O and Al-O [8].
This structure is beneficial for metal ions adsorption.
Online since: October 2023
Authors: R. Sangeetha, C. Nirmala, R. Sumathi, K. Mohanasudha, E. Siva Senthil
The films are very adherent to the substrate and well crystallized according to the face centered cubic structure with the preferred orientation (1 1 1).
It is observed to have a preferred orientation growth along the (1 1 1) direction.[1] All diffraction peaks can be indexed as a face centered cubic structure of PbS thin film.
The structural analysis says that the film formed with FCC structure and (111) orientation perpendicular to the substrate.
Seghaier, N Kamoun, R.Brini and A R Amara, Structural and optical Properties of PbS thin films deposited by chemical bath deposition, Materials Chemistry and Physics, 97(2006) 71-80
[9] Basu.P.K, Chaudhuri.T.K, Nandhi.K.C, Saraswat.R.S. and Acharya.H.N,1990, Preparation and Characterization of Chemically deposited Lead Sulphide thin films, Journal of Material Science and Subject: Chemistry and Material Science and Engineering, Vol 25, No.9 PP-4014-4017
It is observed to have a preferred orientation growth along the (1 1 1) direction.[1] All diffraction peaks can be indexed as a face centered cubic structure of PbS thin film.
The structural analysis says that the film formed with FCC structure and (111) orientation perpendicular to the substrate.
Seghaier, N Kamoun, R.Brini and A R Amara, Structural and optical Properties of PbS thin films deposited by chemical bath deposition, Materials Chemistry and Physics, 97(2006) 71-80
[9] Basu.P.K, Chaudhuri.T.K, Nandhi.K.C, Saraswat.R.S. and Acharya.H.N,1990, Preparation and Characterization of Chemically deposited Lead Sulphide thin films, Journal of Material Science and Subject: Chemistry and Material Science and Engineering, Vol 25, No.9 PP-4014-4017