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Online since: February 2012
Authors: Jyun Yu Chen, Hong Wen Wang, Wen Jie Lan, Jia You Liou, Ygin Chieh Chen
A heterogeneous structured photo electrode using CDS -modified TiO2 nanotube arrays (TNA) was fabricated.
FESEM, EDS, XRD and UV-Visible were employed to characterize the structures and properties of CDS -modified TNA heterogeneous structure.
Peng:Journal Physical Chemistry C, Vol. 113(2009) p.16021
Sato: Journal Materials Chemistry, Vol. 11 (2001) p.3343
Guo:Journal Physical Chemistry C, Vol. 111(2007) p.13437
FESEM, EDS, XRD and UV-Visible were employed to characterize the structures and properties of CDS -modified TNA heterogeneous structure.
Peng:Journal Physical Chemistry C, Vol. 113(2009) p.16021
Sato: Journal Materials Chemistry, Vol. 11 (2001) p.3343
Guo:Journal Physical Chemistry C, Vol. 111(2007) p.13437
Online since: March 2007
Authors: Chang Liu, Xi Feng Qin, Zhu Hong Yang, Xin Feng, Xiao Hua Lu
Control of Surface Morphologies and Crystal Structures of Potassium
Titanate Fibers by Flux Method
Chang Liu1 , Xifeng Qin
2, Zhuhong Yang3, Xin Feng
4, Xiaohua Lu*5
College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009,
China
1 changliu@njut.edu.cn, 2 superman107@163.com, 3 y3n_4@yahoo.com, 4 xfeng@njut.edu.cn,
*5 xhlu@njut.edu.cn
Key Words: potassium titanate fibers, surface morphologies, crystal structures, flux method
Abstract: In this work, flux method is used to control the surface morphologies and crystal
structures of the fine K2Ti6O13 fibers.
In this work, Flux method [5] is used to control the surface morphologies and crystal structures of these fine K2Ti6O13 fibers.
K2CO3 (CP, Shanghai Chemistry Reagent Factory), KCl (AR, Shanghai Zhenxin Reagent Factory).
Fig. 3 shows that the crystal structures of fibers have been transformed to K2Ti4O9 with Zigzag layered structures.
K2Ti2O5 with linear layered structures also appears when the amount of K2CO3 reaches 40wt%.
In this work, Flux method [5] is used to control the surface morphologies and crystal structures of these fine K2Ti6O13 fibers.
K2CO3 (CP, Shanghai Chemistry Reagent Factory), KCl (AR, Shanghai Zhenxin Reagent Factory).
Fig. 3 shows that the crystal structures of fibers have been transformed to K2Ti4O9 with Zigzag layered structures.
K2Ti2O5 with linear layered structures also appears when the amount of K2CO3 reaches 40wt%.
Online since: December 2014
Authors: Hu Lin Li, Li Xia Huo, Hui Zhou, Yu Gang Zheng, Kai Feng Zhang, Rui Peng Sang
Synthesis of highly-ordered V2O5 nanowires by AAO template and its electrocatalytic activity for dopamine electro-oxidation
Kaifeng Zhang* 1, Hui Zhou1, Hulin Li2, Ruipeng Sang1, Lixia Huo1
and Yugang Zheng1
1Science and Technology on Surface Engineering Laboratory, Lanzhou Institute of Physics,
China Academy of Space Technology, Lanzhou 730000 P.R.China
2College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
E-mail address: zhangkf07@hotmail.com
Keywords: Oxides; sol-gel chemistry; catalytic properties
Abstract.
The morphologies, structures and components of the nanowires were characterized by XRD, SEM and XPS.
In the process, the concepts of sol-gel chemistry and template synthesis were well combined.
Although the background diffraction peaks of alumina template are very strong, the major diffraction peaks of V2O5 are clearly observed, which are consistent with orthorhombic phase structure V2O5 (001) and (101) plane.
It is believed that the synthetic strategy may be extendable to prepare other 1D materials, and the good electrocatalytic behavior of V2O5 nanowires is potentially applied in the fields of biosensor and catalytic chemistry.
The morphologies, structures and components of the nanowires were characterized by XRD, SEM and XPS.
In the process, the concepts of sol-gel chemistry and template synthesis were well combined.
Although the background diffraction peaks of alumina template are very strong, the major diffraction peaks of V2O5 are clearly observed, which are consistent with orthorhombic phase structure V2O5 (001) and (101) plane.
It is believed that the synthetic strategy may be extendable to prepare other 1D materials, and the good electrocatalytic behavior of V2O5 nanowires is potentially applied in the fields of biosensor and catalytic chemistry.
Online since: January 2012
Authors: Qing Zhi Fei, Zhi Xu
Structure of chitin during this process is characterized by infrared spectroscopy (IR) and scanning electron microscopy (SEM).
Mechanical-chemistry is also known as the mechanical chemistry, specializing in physical and chemical changes that induced by high-energy machine.
We should take further study on these structure and properties.
Conclusions (1) Producing chitosan by mechanical-chemistry process is simple, easy to operate and pollution-free.
Thereby it proves effectively that acetyl has been removed from the department by mechanical-chemistry reaction.
Mechanical-chemistry is also known as the mechanical chemistry, specializing in physical and chemical changes that induced by high-energy machine.
We should take further study on these structure and properties.
Conclusions (1) Producing chitosan by mechanical-chemistry process is simple, easy to operate and pollution-free.
Thereby it proves effectively that acetyl has been removed from the department by mechanical-chemistry reaction.
Online since: August 2013
Authors: Ying Wang
Geometric configurations of the three compounds are optimized by DFT method of quantum chemistry on B3LYP/6-31G.
In the present work quantum chemistry method is used to optimize their structures and study the influence of substituent on structural parameters.
Based on the optimized structures, we probe into their excited and emission fluorescence spectra theoretically.
Fig. 1 Structures of the three compounds Theoretical method Fluorescent molecules always have rigid plane and delocalized π bond.
Results and Discussion Configuration Structures The characteristic of the compounds is that they have a large delocalizedπbond in their structures, which is the basis that the compounds generate fluorescent spectra.
In the present work quantum chemistry method is used to optimize their structures and study the influence of substituent on structural parameters.
Based on the optimized structures, we probe into their excited and emission fluorescence spectra theoretically.
Fig. 1 Structures of the three compounds Theoretical method Fluorescent molecules always have rigid plane and delocalized π bond.
Results and Discussion Configuration Structures The characteristic of the compounds is that they have a large delocalizedπbond in their structures, which is the basis that the compounds generate fluorescent spectra.
Online since: June 2020
Authors: Apipong Putkham, Somchai Ladhan, Ajchara Imkum Putkham
Keywords: calcium oxide, eggshell, catalyst, pore structure, calcination.
Results and Discussions Effect of Thermal Decomposition on Crystalline Structure.
Journal of Materials Chemistry A. 2014;2(35):14270-14288
ACS Sustainable Chemistry & Engineering. 2018;6(4):5283-5295
Indonesian Journal of Chemistry. 2013;13(2):5
Results and Discussions Effect of Thermal Decomposition on Crystalline Structure.
Journal of Materials Chemistry A. 2014;2(35):14270-14288
ACS Sustainable Chemistry & Engineering. 2018;6(4):5283-5295
Indonesian Journal of Chemistry. 2013;13(2):5
Online since: April 2005
Authors: Besim Ben-Nissan, Adriyan Milev, R. Roest, Hala Zreiqat, Stella Valenzuela
H.zreiqat@unsw.edu.au
2
Department of Chemistry, Materials and Forensic Science, University of Technology, Sydney,
P.O.
Previously we demonstrated that surface chemistry modification of bioceramics induced osteogenesis.
We propose that improved strength and integration rate of an implant in osseous tissue will be achieved by specifically altering the interfacial chemistry of a biomaterial with bioactive molecules.
Previously we have shown that biomaterials and surface chemistry modification influence bone cell (osteoblasts) adhesion (2), growth (3) and phenotypic expression including the pattern of integrin expression (4).
Western blot analysis revealed that surface chemistry modification of Ti-6Al-4V with CHAp caused a strong activation of Shc proteins (isoforms 66, 52, 46) and phosphorylated Erk1/2 (Fig 2A and 2B).
Previously we demonstrated that surface chemistry modification of bioceramics induced osteogenesis.
We propose that improved strength and integration rate of an implant in osseous tissue will be achieved by specifically altering the interfacial chemistry of a biomaterial with bioactive molecules.
Previously we have shown that biomaterials and surface chemistry modification influence bone cell (osteoblasts) adhesion (2), growth (3) and phenotypic expression including the pattern of integrin expression (4).
Western blot analysis revealed that surface chemistry modification of Ti-6Al-4V with CHAp caused a strong activation of Shc proteins (isoforms 66, 52, 46) and phosphorylated Erk1/2 (Fig 2A and 2B).
Online since: August 2003
Authors: Kazuyoshi Uematsu, Mineo Sato, Kenji Toda, Masato Kawakami
A
layered perovskite titanate, NaLaTiO4, with an ordered K2NiF4 type structure was dissolved into an
aqueous HNO3 solution to give crystalline rutile titania at 90 °C.
Until recently, the structure refinements of these compounds have not been undertaken.
In recent paper, we have reported the crystal structure of layered perovskite compounds, NaLnTiO4 [3].
Fig.1 Crystal structure of layered perovskite NaLaTiO4.
The developed soft chemistry process is a general and Fig. 4 Photocatalytic activities of as-prepared TiO2 (غ), soft chemical TiO2 annealed at 600 °C (ٌ), and commercial rutile (٤) monitored at 663 nm.
Until recently, the structure refinements of these compounds have not been undertaken.
In recent paper, we have reported the crystal structure of layered perovskite compounds, NaLnTiO4 [3].
Fig.1 Crystal structure of layered perovskite NaLaTiO4.
The developed soft chemistry process is a general and Fig. 4 Photocatalytic activities of as-prepared TiO2 (غ), soft chemical TiO2 annealed at 600 °C (ٌ), and commercial rutile (٤) monitored at 663 nm.
Online since: April 2021
Authors: R.O. Sirotkin, O.S. Sirotkin
It is worth noting that the differences in structure of subsequent levels (Table 1) start to grow from 1b) sublevel of fine microstructure (formation of molecules or non-molecular structure).
Lomonosov, in his work "Elements of mathematical chemistry" (an element and a corpuscle) and adopted by the scientific community in 1860 in Karlsruhe (Germany).
Butlerov (chemical structure and bonding), which is, effectively, implemented in the SCBC, is proposed as a modern scientific basis for the unification of methods for controlling structure and properties of substances and materials.
Sirotkin, Chemistry (Fundamentals of unified chemistry), KNORUS, Moscow, 2017
[17] Cambridge International Pre-U Chemistry (Principal) 9791.
Lomonosov, in his work "Elements of mathematical chemistry" (an element and a corpuscle) and adopted by the scientific community in 1860 in Karlsruhe (Germany).
Butlerov (chemical structure and bonding), which is, effectively, implemented in the SCBC, is proposed as a modern scientific basis for the unification of methods for controlling structure and properties of substances and materials.
Sirotkin, Chemistry (Fundamentals of unified chemistry), KNORUS, Moscow, 2017
[17] Cambridge International Pre-U Chemistry (Principal) 9791.
Online since: September 2020
Authors: Larysa Trofimova
In this regard, the solution of the complex problem of obtaining the majority of construction composites with a given structure and predictable performance criteria while reducing the resource intensity for their production is inextricably linked with theoretical and experimental studies in the field of physical chemistry of initial disperse systems.
Therefore, the determining elements of regulation of these processes should be based on modern concepts and principles of physicochemical dynamics – the new physical chemistry scientific direction of disperse systems developed in recent years by N.B.
Definition of the Purpose and Objectives of the Study For a number of years, the author, under scientific guidance and with consultations of the chief of Laboratory of High Concentration Disperse Systems of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, member of the Russian Academy of Natural Sciences, Doctor of Chemistry N.B.
Nevertheless, with all the variety of interpretations, from the standpoint of physical chemistry, the observed phenomenon is of a very general nature, which is expressed in a specific qualitative scheme (Fig. 3).
Skoblinskaia, Physical Chemistry of Internal Deformation of Cement Stone, Moscow, Stroiizdat, 1980.
Therefore, the determining elements of regulation of these processes should be based on modern concepts and principles of physicochemical dynamics – the new physical chemistry scientific direction of disperse systems developed in recent years by N.B.
Definition of the Purpose and Objectives of the Study For a number of years, the author, under scientific guidance and with consultations of the chief of Laboratory of High Concentration Disperse Systems of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, member of the Russian Academy of Natural Sciences, Doctor of Chemistry N.B.
Nevertheless, with all the variety of interpretations, from the standpoint of physical chemistry, the observed phenomenon is of a very general nature, which is expressed in a specific qualitative scheme (Fig. 3).
Skoblinskaia, Physical Chemistry of Internal Deformation of Cement Stone, Moscow, Stroiizdat, 1980.