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Article

Borosilicate Glass Containing Bismuth and Zinc Oxides as a Hot Cell Material for Gamma-Ray Shielding

1Physics Department, Faculty of Science, Al-Azhar University, Girls Branch, Nasr City, Cairo, Egypt

22Physics Department, Faculty of Science, Al-Azhar University, boys Branch, Nasr City, Cairo, Egypt


Physics and Materials Chemistry. 2014, 2(1), 20-24
DOI: 10.12691/pmc-2-1-4
Copyright © 2014 Science and Education Publishing

Cite this paper:
H. A. Saudi, H. A. Sallam, K. Abdullah. Borosilicate Glass Containing Bismuth and Zinc Oxides as a Hot Cell Material for Gamma-Ray Shielding. Physics and Materials Chemistry. 2014; 2(1):20-24. doi: 10.12691/pmc-2-1-4.

Correspondence to: H.  A. Saudi, Physics Department, Faculty of Science, Al-Azhar University, Girls Branch, Nasr City, Cairo, Egypt. Email: heba_saudi@yahoo.com

Abstract

Gamma-ray attenuation coefficients (the half value layer parameters, gamma – ray shielding properties) for the x ZnO - (5−x) Bi2O3 -10 B2O3 -40 SiO2 (x = 0, 5, 10, 15 and 20) at 662, 1173 and 1332 keV photon energies have been determined experimentally, using a narrow beam transmission method, as well as theoretically using the ‘mixture rule’ and the ‘XCOM’ computer software. The molar volume and FTIR investigations have been used to study the structural properties of the glass system. Optical, UV-visible, absorption measurements were performed also to investigate the transmittance aimed to investigate the performance of the glass system for using as hot cells for shielding windows in nuclear technology.

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References

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Article

DFT-Calculations of Thermodynamic Parameters of ZnTe, ZnSe, ZnS Crystals

1Department of Physics and Chemistry of Solid State

2Physics and Chemistry Institute, SHEE “Vasyl Stefanik Precarpathian National University”, Ivano-Frankivsk, Ukraine

3Department of Inorganic Chemistry, Yuriy Fedkovych Chernivtsi National University, Chernivtsi, Ukraine


Physics and Materials Chemistry. 2014, 2(1), 14-19
DOI: 10.12691/pmc-2-1-3
Copyright © 2014 Science and Education Publishing

Cite this paper:
T.O. Parashchuk, N.D. Freik, P.M. Fochuk. DFT-Calculations of Thermodynamic Parameters of ZnTe, ZnSe, ZnS Crystals. Physics and Materials Chemistry. 2014; 2(1):14-19. doi: 10.12691/pmc-2-1-3.

Correspondence to: T.O.  Parashchuk, Department of Physics and Chemistry of Solid State. Email: taras-parashchuk@i.ua

Abstract

Based on the analysis of the crystal and electronic structure of semiconductors ZnX (X=Te,Se,S) in cubic phase there have been built the cluster model for calculation of the geometric and thermodynamic parameters. The method of consideration of the boundary conditions for the proposed cluster models has been presented. Based on the results of ab initio quantum-chemical calculations of the crystal structure of molecular clusters the temperature dependence of formation energy ∆E, formation enthalpy ∆H, Gibbs free energy ∆G, entropy ∆S, specific heat capacity at constant volume CV have been defined. Computer calculations of the thermodynamic parameters were carried out with the help of density functional theory (DFT), using hybrid valence base set B3LYP. Also, in the work have been derived analytical expressions of temperature dependences of the presented thermodynamic parameters, which have been approximated by a quantum-chemical calculation data using mathematical package Maple 14.

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References

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Article

α- Zirconium Titanium Phosphates - Fibrous Cerium Phosphate Composite Membranes and Their 1,10- Phenanthroline Cu(II) Pillared Materials

1Department of Chemistry, Faculty of Science, Tripoli University

2Department of Chemistry, Sebha University, Sebha

3Industrial Research Centre, Tripoli, Libya


Physics and Materials Chemistry. 2014, 2(1), 7-13
DOI: 10.12691/pmc-2-1-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Sadek K.Shakshooki, Mohamed B.Hassan, Wafaa K.EL-Nowely, Abdulhafiz El-Belazi, Sumaia M. Abed, Mona.M. Al-Said. α- Zirconium Titanium Phosphates - Fibrous Cerium Phosphate Composite Membranes and Their 1,10- Phenanthroline Cu(II) Pillared Materials. Physics and Materials Chemistry. 2014; 2(1):7-13. doi: 10.12691/pmc-2-1-2.

Correspondence to: Sadek  K.Shakshooki, Department of Chemistry, Faculty of Science, Tripoli University. Email: shakshooki2002@yahoo.com

Abstract

Nanosized fibrous cerium phosphate, Ce(HPO4)2.2.9H2O(nCePf), and α- Zirconium -Titanium Phosphates, ZrxTi1-x(HPO4)2.H2O(α-ZTP), where x = 0.9, 0.8, 0. 67, 0.34, were synthesized. Novel composite membranes [ZrxTi(1-x)(HPO4)2]0.25 [Ce(HPO4)2]0.75 .3.3H2O were prepared. Reactions of the resulting composite membranes with 1,10-phenanthroline in ethanol, followed by the addition of 0.1M CuCl2.2H2O, in (1:1) ethanol: aqueous solution, lead to the formation of novel pillared materials: [(H1.16) Zr0.9Ti0.1 (PO4)2]0.25[(H1.16 ) Ce (PO4)2]0.75(PhenCu)0.42.2.25H2O, [(H1.5)Zr0.8Ti0.2 (PO4)2]0.25 [( H1.5)Ce (PO4)2] 0.75 (Phen Cu)0.25.1.77H2O, [(H0.3 ) Zr0.67Ti (PO4)2] 0.25 [(H 0.3) Ce (PO4)2]0.75.(Phen Cu)0.85. 4H2O, [(H1.6)Zr0.34Ti0.66 (PO4)2]0.25 [(H1.6) Ce (PO4)2]0.75.(PhenCu)0.2. 2.22 H2O, respectively. They were characterized by chemical, X-ray diffraction (XRD) and thermal analysis (TGA), accordingly were formulated. XRD patterns of the composite materials retain (d) spacing reflection of α-ZTP and nCePf, where d001 = 7.58 Å and 11.38 Å, respectively, The resulting composites are thermally stable and can be considered as novel ecofriendly solid acid catalysts, Ionex changers and ionc conductance materials.

Keywords

References

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Article

Facile Synthesis of Poly (vinylalcohol)/Fibrous Cerium Phosphate Nanocomposite Membranes

1Department of Chemistry, Faculty of Science, Tripoli University, Tripoli, Libya


Physics and Materials Chemistry. 2014, 2(1), 1-6
DOI: 10.12691/pmc-2-1-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
S.K. Shakshooki, A.A. Elejmi, A.M. Hamassi, F.A. El-Akari, N.A. Masoud. Facile Synthesis of Poly (vinylalcohol)/Fibrous Cerium Phosphate Nanocomposite Membranes. Physics and Materials Chemistry. 2014; 2(1):1-6. doi: 10.12691/pmc-2-1-1.

Correspondence to: S.K.  Shakshooki, Department of Chemistry, Faculty of Science, Tripoli University, Tripoli, Libya. Email: shakshooki2002@yahoo.com

Abstract

Nanosized fibrous cerium phosphates, Ce(HPO4)2.2.9H2O (nCePf), was prepared and characterized. Poly (vinylalcohol)/fibrous cerium phosphate nanocomposite membranes of different weight percentages (2.5,5,10 and 20 wt %) were synthesized. and found to be transparent flexible thin films. They were characterized by chemical, XRD, TGA analysis, and transmission electron microscopy (TEM). TEM images of PVA/nCePf nanocomposites show fibrous cerium phosphate in the nanometer scale, in the range of 12-15 nm, and was dispersed in the PVA matrix. The composite materials show to have mechanical and thermal stability properties superior to that of the original polymer. The exchange capacities of composite membranes were investigated and found to be equivalent to summation of ion exchange capacities of PVA and the inorganic filler (nCePf) wt % loading.

Keywords

References

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