Search results

Polyethylene glycol (PEG) and Nanozeolite (NZ) were used as additives to improve the membrane’s porosity, chemistry, and overall performance in ion adsorption.
The structure of zeolite consists of 3- dimensional frameworks made up of SiO4 and AlO4 tetrahedral.
Meanwhile, the addition of nanozeolite alters the surface morphology that resulted in a crumple-like structure, and made pores appear more evident. 0.025wt% is the optimum loading of NZ in the polymer matrix, and beyond the said concentration, agglomeration occurs.

Among them, template method has been extensively used to prepare mesoporous carbon due to its less metal residue, low cost and flexible pore-structure controllability.
Micromeritics tristarⅡ 3020 was used to determine the surface area and pore structure of the mesoporous carbon.
Surface area and pore-structure of mesoporous carbons The surface area and pore structure of the mesoporous carbon were determined with Micromeritics tristarⅡ 3020.
By analyzing the BET results, it was concluded that mesoporoe carbon possessing superior pore structures could be prepared by one-step template method.
[8] Sun Dong,Li Xiaokun,Zhang Huajie,et al.International Journal of Environmental Analytical Chemistry,2012, 92: 3, 324-333.

Synthesis and Photoelectrocatalytic Property of Two-Nonmetal- Codoped TiO2 Nanotube Arrays with High Aspect Ratio Haida Liaoa, Weiping Zhang, Xiaoming Sun, Liang Shi and Mingfeng Qin College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning 530006, China a lhd21c@tom.com Key words: TiO2 nanotube array; high aspect ratio; binary doping; photoelectrocatalysis Abstract: Electrolyte containing F– was employed to conduct two-step anodic oxidation.
Using FSEM, XRD and EDS, the characterization on the topography, structure and doped elements of TiO2 nanotubes were performed.
In the case of nanotube array with high aspect ratio, the doping substance is difficult to be doped in the hollow structure of nanotube, thus the effect of hollow doping of nanotube array is restricted.
At 500°C, TiO2 was mixed crystal structure with a certain ratio of anatase and rutile.

On the basis of microstructure observations, the first exhibits adiabatic shear bands, which called instability domain, the second represents fine recrystallized grain structures, which called stability domain.
These exhibits fine recrystallized grain structures with serrated grain boundaries.
Fine recrystallized grain structures produced at 0.01s-1, 950˚Cowing to the δ phase precipitates and grain growth occurred above 1050˚C owing to phase precipitates and carbides dissolution. 3.
Materials Chemistry and Physics, Vol. 3 (2006), p.1-5

Synthesis Parameters of Ultrafine YAG Powder Materials via Hydrothermal Precipitation Method Minghan Xu1, Aixia Chen1a, Ruihua Wang1, Longtao Liu1, Zhihui Li1, Shibin Li1, Jieguang Song2b, Lin Chen2, Chengwei Hao3 1School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China 2Key Laboratory for Industrial Ceramics of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China 3School of Architecture and Civil Engineering, West Anhui University, Luan 237012, China a93618054@qq.com, bsongjieguang@163.com Keywords: YAG; ultra-fine powder; synthesis parameters; hydrothermal precipitation method Abstract.
The experimental results show that the rod-like particles have a poly-crystal structure at the reaction temperature of 200℃, reaction time of 2 days and the molar ratio of salt to alkali of 1:8.
It can be seen that the diameter of rod-like particles is about 150nm, the length of about 4000nm, and rod-shaped crystal in the transmission electron microscope to see the diffraction spot for the ring, that the powder is polycrystalline structure.
The experimental results show that the rod-like particles have a polycrystal structure at the reaction temperature of 200℃, reaction time of 2 days and the molar ratio of salt to alkali of 1:8.

Evolution of crystal structure of the induction melted sample upon annealing and spark plasma sintering (SPS) was tracked by room-temperature X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods.
A number of other methods such as wet chemistry route [32], microwave synthesis [33], mechanical alloying [34], combustion synthesis [35,36], direct melting [15,37,38], melt spinning [39], flux- [40], MgH2- [41,42], and H2- [43] assisted synthesis methods have been proposed for preparing Mg2Si-based thermoelectric materials.
Structure of the samples was characterized by scanning electron microscopy (SEM, JEOL 6700) in backscattered electron signal.
According to these data, the sample crystallizes in a cubic crystal structure.

Fabrication and Preparation of Coal-Water Slurry Dispersant with Amphoteric Polycarboxylate Junfeng Zhu1,a﹡, Guanghua Zhang1,b,Zhuo Miao2,c and Hao Hao1,d 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, littlezhuo1213@yahoo.com.cn, demail:syxyyhh@163.com ﹡corresponding author: Junfeng Zhu Keyword: energy sources, coal-water slurry (CWS), amphoteric polycarboxylate (AmPC) dispersant, apparent viscosity, stability Abstract.
And then, The molecule structure of amphoteric polycarboxylic dispersant was characterized by FTIR.

Thus, the structure of the grown crystals approaches the stoichiometric structure of the lithium niobate crystal (Li/Nb = 1) with increasing boron concentration in the melt.
It indicates the same nature of hydrogen bonds in the structure of these crystals.
It allows us to adjust the Li/Nb ratio and approximate the structure of LiNbO3:B3+ crystals to a structure of LiNbO3stoich with a constant refractive index along the growth axis.
Polgar, Growth, defect structure, and THz application of stoichiometric lithium niobate, Appl.
Polgar, Growth, defect structure, and THz application of stoichiometric lithium niobate, Appl.

Increasing the proportion of PEG, many flowerlike or starlike branched structures having ends of regular hexagonal prismatic structure, are formed.
The schematic representation of regular hexagonal pyramid structure (p), regular hexagonal prism structure (c) and side structure (m) is shown in Fig. 10.
Crystallographic structures.
Increasing the proportion of PEG, many flowerlike or starlike branched structures, having ends of regular hexagonal prismatic structure, are formed.
Cai: Journal of Solid State Chemistry, Vol. 178, (2005) p. 1864

Ferrite structure is spinel with the formula AB2O4, where A and B represent various cations of transition metals such as iron (Fe).
Quantitative analysis was performed using general structure analysis system (GSAS) software.
An interesting thing to learn is the ability of La atoms to substitute Fe atoms with the same structure.
The CoFe2-xLaxO4 structure is a cubic with a space group (Fd-3m).
M., Kamyar S., A comparative study of differet concentrations of pure Zn powder effects on synthesis, structure, magnetic and microwaveabsorbing properties in mechanically-alloyed Ni-Zn ferrite, Journal of Physics and Chemistry of Solids, 2016, 96-97, pp. 49 – 59