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Fe-Modified ZSM-5 and β Zeolites for Direct N2O Decomposition Quanhui GUO1,a, Juan Li1 and Yingxia LI2,b* 1 College of Chemistry and Chemical Engineering, Institute of Fine Chemical and Engineering, Henan University, Kaifeng 475004, China 2 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China aqhguo@henu.edu.cn, bliyx@buct.edu.cn Keywords: Fe-ZSM-5, Fe-β, zeolite, N2O decomposition, ion-exchanged Abstract.
From the results of EPR spectra, it indicated that the same iron species were loaded on ZSM-5 and β zeolites thought the channel structures of above zeolites was different.
However, the channel structure and the Brönsted acid sites of the above zeolites are different so that the distribution of charge-balancing iron cations is different.

The nature and structure of spinel ferrite crystals were studied by Bragg and determined in 1915 [1, 15].
The spinel ferrite group consists of numerous materials with nearly similar structures.
ZnFe2O4 (Zinc ferrite) is a normal spinel by structure.
Bragg, The structure of magnetite and the spinels, Nature 95 (1915) 561
Klabunde (Ed), Nanoscale Materials in Chemistry, New York, Wiley, 2001

Its structure is shown below: Reagent-grade NaCl powder, nitric acid (HNO3) or ammonia (NH4OH) solutions(Shanghai Chemical Reagent Co., Ltd., Shanghai, China) were also used; and the distilled water was produced in our laboratory.
This is probably because that the surface chemistry of powder varies according to how it was manufactured.
Rheology and colloidal structure of aqueous TiO2 nanoparticle suspensions[J].

Microorganisms and bacteria also cause membrane erosion, the deterioration of water temperature, pH, residual chlorine content, pressure and other parameters may cause the membrane hydrolysis and oxidation.[1]Consequently, changes of membrane structure will weak the water permeability of the membrane.
The major harms of the acidic waste water is that it corrodes water pipes, hydraulic structures and building foundation, does harm to the aquatic animals’ breeding after being discharged, and affects crop growth.
Green chemistry and Green Technologies in Water Treatment [J].

These factors contribute to destruction of material structure, lower their usage durability.
Bensted, The chemistry of efflorescence [J].
Materials and Structures 2000, 33: 634 –46

The structure of combustion chamber is regularity, generating 45448 structured meshes. 1.2 Setting the boundary condition The specific form of basic governing equations can be found in literature [7].
“Mechanism and modeling of nitrogen chemistry in combustion”.

Hydroxyapatite/Polyvinyl Alcohol Composite Hydrogels for Bone and Cartilage Tissue Engineering Anna Timofejevaa, Dagnija Locab Riga Technical University, Faculty of Materials Science and Applied Chemistry, Institute of General Chemical Engineering, Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Latvia aanna.timofejeva_1@rtu.lv, bdagnija.loca@rtu.lv Keywords: hydroxyapatite, polyvinyl alcohol, in situ, hydrogels, bone, cartilage, tissue engineering Abstract.
We assume that, during the HAp in situ synthesis in the PVA medium (DH 88%), Ca2+ ions, which were present in the starting suspension, interacted with the residual acetate groups and formed complex structures.
Moreover, the gradual increase of swelling curve and non-occurrence of equilibrium swelling ratio after 55 days of immersion in PBS, in case of HAp/PVA 50:50 samples, may be attributed to the slow diffusion of “bound” water in the structure of the material.

Table 3 Results of beam bending test Item M-CTP miture Standard failure strain /µε 1# 2# 3# Average ≥2300 2654 2589 2692 2645 3.2.3 Freeze-thaw split test Water stability of bituminous pavement means water damage actually, which stands for that water entered into the asphalt mixture through interspace and crack, under the repeated action of the dynamic load of vehicle wheel, the water passed into the interface between asphalt and mineral aggregate, reduced the adhesion of asphalt, which cause asphalt peeled off from mineral aggregate, the whole structure of the road pavement would be destroyed as well.
[9] G.Collin,Production and Application of Coal-Tar Pitch[C].Conference on Structure and Properties of Coals. 1991: 154-162
Polish Journal of Applied Chemistry, 2000, 44(2-3): 167-171

Mala Natha, Asheesh Kumarb and Arijit Mallickc Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India amalanfcy@iitr.ernet.in, basheeshku@gmail.com, carijit.chem08@gmail.com Keywords: carbonaceous material; hydrogen storage; metal-organic compounds; X-ray diffraction; scanning electron microscopy Abstract.
Structures of different metal-organic compounds incorporated with graphite.
Graphite because of its porous structure adsorbs transition metal atoms.

It is very clear that nanoparticles can be synthesized and stabilized by using chemical methods such as chemical reduction [12-13], electrochemical techniques [14], photochemical reactions [15] and now a days via green chemistry route [16].
XRD results confirm the crystallinity and FCC structure of the nanoparticles.
The next characteristic study which was done to study the morphology and crystal structure of the synthesized nanoparticles was TEM.