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Online since: January 2011
Authors: Jun Feng Zhu, Guang Hua Zhang, Zhuo Miao, Shan Shan Yang, Bo Zhou
Synthesis of Amino Methylene Phosphonic Acid Resin-Supported Hydrated Cerium Oxide Hybrid Sorbent and Its Application in Drinking Water Junfeng Zhu1,a﹡,Guanghua Zhang1,b,Zhuo Miao2,c, Shanshan Yang1,d and Bo Zhou1,e 1 Key laboratory of Auxiliary Chemistry & Technology for Chemical Industry Ministry of Education, Shaanxi University of Science & Technology, Xi’an 710021, China 2 Tangdu Hospital,the Forth Military Medical University, Xi'an, 710038, China aemail:zjfeng123123@163.com, bemail:zhanggh@sust.edu.cn, cemail: littlezhuo1213@yahoo.com.cn, demail:ygss1989@163.com, eemail:475564750@qq.com ﹡corresponding author: Junfeng Zhu Keywords: hybrid sorbent;fluoride ion;drinking water;hydrated cerium oxide;amino-methylene phosphonic acid resin Abstract.
The structure and thermal properties of CeH-APAR were tested by FTIR and TGA.
Fourier Transform infrared spectroscopy: A trace of APAR and CeH-APAR were respectively taken in a thin KBr disk, sweep range: 400 ~4000cm-1, to test and compare their structure.
The pH value influences capacity of CeH loaded on the amino phosphoric acid resin.It changes the structure of binding site of the resin surface, the morphology of cerium ions and the interaction between cerium ions and the binding sites.
Online since: May 2011
Authors: Meng Yang Wang, Wei Ran Cao, Hong Liu
The structure and morphology of obtained materials were characterized by X-ray powder diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS).
Room-temperature ionic liquids (RTILs), which are generally exemplified by the combination of a large organic cation with a weakly coordinating anion, have attracted significant attention in many fields of chemistry and industry as environmentally benign solvents.
Each sample exhibits only single broad (100) diffraction peak at about 2θ = 2-3o, indicating the typical less long-range ordered worm-like mesoporous structure as reported by Pinnavaia et al. [16].
Table 1, Structural properties of the HMS samples Sample BMIM+BF4-/Si (mol) Particle size (nm) 2θ (degree) d100 (nm) a0 (nm) Pore diameter (nm) SBET (m2/g) Pore volume (cm3/g) DLS SEM S1 S2 S3 S4 0 0.5 1.0 1.5 348 68 95 177 200-400 50-90 80-100 120-180 2.27 2.22 2.18 2.13 3.89 3.98 4.05 4.14 4.49 4.60 4.68 4.78 2.40 2.59 2.50 2.60 1087.3 1328.3 1180.6 1120.8 0.92 1.26 1.13 1.09 Fig. 1 XRD patterns of the HMS samples The TEM images of the HMS samples shown in Fig. 2 reveal a disordered, wormhole mesopore structure, which is consistent with the small-angle XRD result.
Online since: August 2010
Authors: Oleg Smorygo, Vladislav Sadykov, Natalia Mezentseva, Vladimir Usoltsev, Vitali Mikutski, Alexander Marukovich, Oleg Bobrenok, Uvarov Nikolay
., Novosibirsk, 630090, Russia 5Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze str., Novosibirsk, 630128, Russia a sadykov@catalysis.ru, bolegsmorygo@yahoo.com, cbobrenok@itp.nsc.ru, dUvarov@solid.nsc.ru Keywords: SOFC, metal substrate, foam, nanocomposites, functional layers, design, performance.
The open-cell foam layer (thickness 1-2 mm, cell density 60 ppi) provides the structure robustness, while a thin (100-200 µm) mesoporous layer facilitates supporting functional layers.
Ferritic steel (FeCr) porous SOFC supports are considered as a promising option due to the pore structure suitable for the thin functional layers deposition, the minor mismatch in the thermal expansion, formation of the dense surface oxide scale in the oxidizing environments [4].
Metal foam support structure: (a) open cell foam component; (b) thin compressed foam component; (c) Ni-YSZ cermet coating Cell preparation and testing.
Online since: January 2010
Authors: Yuan Ming Huang
Because molecular self-assembly systems lie at the interface between molecular biology, chemistry, polymer science, materials science and engineering, it represents a significant advance in the molecular engineering of simple molecular building blocks useful for a wide range of applications.
Self-assembly has a number of advantages as a strategy: (1) it carries out many of the most difficult steps in nanofabrication using the very highly developed techniques of synthetic chemistry; (2) it draws from the enormous wealth of examples in biology for inspiration: self-assembly is one of the most important strategies used in biology for the development of complex, functional structures; (3) it can incorporate biological structures directly as components in the final systems; and (4) it tends to produce structures that are relatively defect-free and self-healing because it requires that the target structures be the thermodynamically most stable ones open to the system.
Figure 1 depicts the synthetic scheme and molecular structures of the three-benzene-ring containing banana-shaped compound 1,3-phenylene bis[4-alkyloxylbenzyl ideneamine].
It is evidenced in literature that banana-shaped molecules can be self-assembled into layered structures [6-10].
The periodic structures in Fig. 13 clearly demonstrate that the banana-shaped molecules can self-organize themselves into various kinds of diffraction gratings.
Online since: January 2013
Authors: Meng Le Sun, Yan Xin Yang
The crystalline structure was measured by powder X-ray diffraction (XRD, Philips PW 1700x with Cu Kα line radiation).
If the reaction time is prolonged to 3 h, the dendritic structures become very clear and the length is about 1μm.
The surface of the dendritic structures turned to smooth and the branch grow on the trunk began to emerge.
When the distilled water was changed to ethanol, the products were nanoflowers composed of nanorods of horn structure.
Xu: Chinese Journal of Inorganic Chemistry, Vol. 24 (2008), p. 1434 [17] D.
Online since: July 2012
Authors: Bin Ba Yan, Pin Wang, Si Man Liu
Studied on preparation Montmorillonite modified by CTAMB and adsorption performance on nitrobenzene Liu siman1a Yan binba1b Wang pin1c 1 Department of chemistry, Mianyang Normal University, Mianyang 621000 a liusim@sina.com b 215805336@qq.com c 943302180@qq.com Keywords: CTAMB, modified, adsorption Abstract: Na-montmorillonite was modified by CTAMB through the intercalation.
However, the force between the cations and the structures of the cell layers is so weak that montmorillonite modified attracts inorganic or polymer into the interlayer with the exchangeability of ions, thereby its activities enhanced [6].
The structure is completed in the Spectrum One Fourier transform infrared spectroscopy.
It shows that the layer structure of montmorillonite has changed by modification.
Fig.6 Adsorption properties on nitrobenzene and the changes of the crystal spacing of MMT’s under reaction time. 2.1.3 Effect of temperature on the structure and adsorption properties The amount of CTAMB is 4 mmol, the reaction time is 4 h, and the reaction temperature is between30˚C and 70˚C.
Online since: August 2017
Authors: Susan T.L. Harrison, Robert J. Huddy, Robert van Hille, Tomas Hessler, Tynan Marais
The CSTR supports a purely planktonic microbial community, whilst solid support structures are incorporated into the UAPBR and LFCR enhance biomass retention.
Solution chemistry was routinely monitored for sulfate, sulfide and volatile fatty acid concentrations as well as pH and redox potential.
A detachment protocol for the recovery of matrix-associated and matrix-attached cells from the solid support structures has been adapted from Govender et al. [8].
Briefly, solid support structures were aseptically sampled from the reactors, in triplicate.
The incorporation of solid support structures is expected to confer the LFCR and UAPBR with enhanced reactor performance, through increased biomass retention.
Online since: June 2012
Authors: Jun Qing Meng
The results showed that power ultrasound has an important impact on the pore structure of coal, and pore volume increased with increasing ultrasonic treatment time, the largest increase to 28.32%.
These change the porous structure and permeability of the coal, and to promote the infiltration of water into the porous structure of coal, improve the wetting of coal [7].
Power ultrasound has important effect on the permeability and pore structure of the coal material.
The mechanics of power ultrasound on coal-water system, related to the theory of mechanics, acoustics, physics, chemistry, and so need to be multidisciplinary in-depth study.
The influence mechanism of different frequencies power ultrasound on porous structure and permeability of coal material through experimental study.
Online since: September 2013
Authors: Shi Jun Yu, Xiao Li Wang, Xu Han
The resulting structure possessed a continuous network macropores, the walls of which were made up of porous crystals of MnO with 50 nm pores [23].
Such as-synthesized materials have macroporous structures and mesopores wall, the APS architecture would be favorable for capture more light and transfer light into the deeper layer of the 3D system, thus enhance light harvesting.
This novel structure of the material provides a high specific capacitance of 715 F g-1 and remarkable rate capability.
The chemistry of the process was investigated for improved understanding of macropore structure formation by examining the effects of sol-gel parameters such the as alkyl group of the starting alkoxides and the central metal atom as well as pH of the starting solution.
Layer structured metal chalcogenides are of great interests in energy storage because their crystal structure can be easily utilized for the reversible storage of hydrogen, lithium, sodium and magnesium via electrochemical intercalation, making them good candidates for fuel cell, lithium ion battery, sodium ion battery and magnesium ion battery applications [28].
Online since: February 2014
Authors: Jian Xiong, Jun Ye, Wen Hao Li
The DACMC structure is identified by FTIR.
The junctions finally form the physical network structure.
Cross-link can make interaction between the molecular chains more strong and maintain the overall structure stable.
It may be difficult to disrupt such structure.
The the network structure of the DACMC solution was stronger than CMC’s.