Search results

The morphology and structure of the calcium carbonate were characterized by scanning electron microscopic (SEM), Fourier transform infrared spectroscopy (IR) and powder X-ray diffraction (XRD).
The yield of calcium carbonate precipitation, crystal structure, morphology, sedimentation volume and packing density are under the influence of external conditions in the process of microbial precipitation method, such as pH, temperature, concentration, precipitation time and other factors.
Some samples were rhombic, petal-like, rectangular and irregular bulks paticles, which distributed disorderly with the characteristics of multi-layer overlapping structure on the surfaces, ranged 1～15μm in diameters(Fig.C6, Fig.C10 and Fig.C15). calcium carbonate in sample C1, C10 and C15 dispersed uniformly, while in sample C6 packed the most intensively.
Journal of Solide State Chemistry Vol. 177 (2004), p. 681-689
Materials and Structures Vol.36 (2003), p. 342-352

Quantitative Analysis of the Content of Substituent Group in Difunctional Polysiloxane Chunqi Shenga , Zhirong Qub , Jianxiong Jiangc, Guoqiao Laic Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 310012 China ashengchunqi@yahoo.com.cn bquzhirong@gmail.com c,dlaiguoqiao@yahoo.com.cn Keywords: Silicone, Polysiloxane, Elemental analyzer, Nuclear magnetic resonance, The content of substituent group Abstract.
With this purpose, analysis of the quality percentage content of C and H in four different kinds of difunctional polysiloxane in automatic elemental analyzer, then compute the formula weight of a basic structure unit to deduce the content of the substituent group.
Introduction Polysiloxane is a material of polymer which backbone is made up of Si-O bonds, Si atom connects to the H atom or other to form the side chains, so the organic groups and the inorganic structure are coexist in this kind material.
Compare with the pure organic and inorganic material, the special composition and structure decide this material has special performance.
We are doing research in the determining the content of group in other similar structure polymer using this method.

Preparation and Characterization of the Hydrophilic Polysulfone Ultrafiltration Membrane Xi Wang1,a, Zhi-Ping Zhao1,b*, Peng Lu1,c 1School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China a18701518606@163.com, bzhaozp@bit.edu.cn, clupeng1204@163.com Keywords: Polysulfone, Ultrafiltration membrane, Hydrophilic, Grafting.
The structure of membrane was characterized by Fourier transform infrared and the properties were measured by pore size, contact angle and membrane water flux.
Results and Discussion Chemical Structure Analysis of Hydrophilic CMPSF Membrane.
Furthermore, when the reaction time increased from 60 min to 120 min, ultrafiltration membrane structure has a significant change.
However, when the reaction time of more than 120 min, the structure parameters along with the change of the reaction time tend to change slightly

athanikaieswaran@gmail.com, bjothi141@yahoo.co.in and cmurugakoothan03@yahoo.co.in Keywords: Copper nanoparticles, Ocimum sanctum (Tulsi), structure determination, optical tweezers, Optical forces, Rayleigh Theory.
The copper nanoparticles are crystallized with FCC structure.
The XRD pattern shows a high crystalline level using a leaf extract of ocimum sanctum of copper sample with diffraction angles of 43.15°, 50.12° and 74.24°, which correspond to the characteristic face centered cubic (FCC) structure of copper and are indexed as (111), (200) and (220) respectively [2, 12].
The copper nanoparticles are crystallized with FCC structure.
Green and Purple, Journal of Applied Chemistry, Vol 7, (2014), 123-127 [6] Anuradha G, B., Syama Sundar and M.

The rates of methylene blue degradation using the tubular structure are almost twice that using the sponge like structure.
Alivisatos, Perspectives on the physical chemistry of semiconductor nanocrystals, J.
El-Sayed, Chemistry and Properties of Nanocrystals of Different Shapes, Chem.
Jorio, Unusual properties and structure of carbon nanotubes, Annu.
Shen, The surface chemistry of hybrid nanometer-sized particles I.

X-ray diffraction (XRD) analysis demonstrates that the films are found of anatase phase in crystal structure.
Most of these applications are thanks to its n-type semiconducting property and realized with micro or nano structured TiO2 powders or thin films.
Films deposited at temperatures in the range from 400 to 500oC, show the anatase crystalline structure.
Vishnyakov, Journal of Photochemistry and Photobiology A: Chemistry, 2010, 211, pp. 59–64

The device ultilized the leg-style structure with front and rear legs supporting alternately to simulate the process of human being walking up and down the stairs.
Stair-climbing system utilizes with leg-style structure, divided into two systems as front-leg system and back-leg system (Fig. 1).
Fig. 1 Working principle of the wheelchair Fig. 2 Structure of Z-style backplane Design of Z-style backplane To prevent wheelchair from rolling over, the backplane of legs all adopts the Z-style, which helps it stand across two stairs (Fig. 2).
Vol. 22 (2010), p.2740-2745 [5] Liu Jianjun: Basic tutorial examples of SolidWorks 2009 (Chemistry Industry Press, China 2009).

Department of Chemistry and Environmental Engineering, Hubei University for Nationalities, Enshi, 445000, China 2 Research Center of Eco-Tourism Culture in Western Hubei, Institute of Economics and Management, Hubei University for Nationalities, Enshi, 445000, China a E-mail: syw2788@hotmail.com, b E-mail: dxh790816@126.com Keywords: Kaolinite; Acid activation; Adsorption; Ni(II) Abstract: X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen physical adsorption, potentiometric titrations and batch adsorption experiments were employed to characterize the crystal structure, micromorphologies and surface properties of raw kaolinite (RKao) and acid-activated kaolinite (AAKao).
This implies that the crystal structure of RKao was partially destructed during the acidification.
This could be ascribed to the facts that: (1) the well crystal structure of RKao was partially destructed during the acidification, and (2) the particle size of AAKao was smaller than that of RKao.

Proton Conducting Electrolytes Synthesized with Diammonium Hydrogen Phosphate Dedy Eka PRIYANTO1, Hidenobu SHIROISHI 1, Satoshi TANIMOTO 2, Shunsuke HIRUKAWA 2, Morihiro SAITO 2, and Jun KUWANO 2 1Department of Chemical Science and Engineering, Tokyo National College of Technology, Kunugida 1220-2, Hachioji-shi, Tokyo 193-0997, Japan 2Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo 162-0826, Japan ABSTRACT Proton conducting ZrO2－yP2O5 (y = 1.0, 1.2, 1.4. 1.6, 1.8) electrolytes based on a shell-core structure were synthesized with diammonium hydrogen phosphate by a solid state reaction, and their conductivities were investigated by ac-impedance spectroscopy.
Hence, the electrolytes have a ZrP2O7-based core and amorphous phosphates-based shell structure [8-11].
This probably indicates that there is a limit of y (P2O5 content) to retain the shell-core structure.

Synthesis and Kinetic of Palladium Nanotube using Polymer Compound Jong-Ho Lee1,a, Choong-Soo Chi2,b, Han-Jun Oh3,c 1Department of Chemistry, Hanseo University, Seosan, 352-820, Korea 2School of Advanced Materials Engineering, Kookmin University, Seoul, 136-702, Korea 3Department of Materials Science, Hanseo University, Seosan, 352-820, Korea ajhlee@hanseo.ac.kr, bcschi@kookmin.ac.kr, chanjun58@hanseo.ac.kr Keywords: Template wetting, Nanotube, Palladium, Friedman method Abstract.
The palladium nanotubes can be successfully fabricated by the template wetting process, and the crystalline structure is confirmed by XRD.
The crystalline structure of synthesized Pd nanotubes was observed by XRD.
The palladium nanotubes can be successfully fabricated by the template wetting process, and the crystalline structure was confirmed by XRD.