Aziz Kheireddine - Academia.edu (original) (raw)

Papers by Aziz Kheireddine

Chemical Data Collections, 2018

Chemical preparation, crystal structure and vibrational study are reported on a new diphenylhydra... more Chemical preparation, crystal structure and vibrational study are reported on a new diphenylhydrazine dihydrogenophosphate (C 6 H 9 N 2) 2 H 2 P 2 O 7 (DPHDP) single crystal. This organic cationic diphosphate compound was synthesized by the method of ion exchange resin. (C 6 H 9 N 2) 2 H 2 P 2 O 7 crystallizes in the monoclinic system. The structural resolution shows the existence of H 2 P 2 O 7 2ion chains linked together by hydrogen bonds. The organic cations C 6 H 9 N 2 + and the phosphate chains are linked together by hydrogen bonds. The vibrational study by IR spectroscopy of the title compound reveals the presence of three bands and confirms the existence of non-equivalent positions of water molecules in the structure.

Chalcogen Chemistry, Feb 20, 2019

Chemical preparation, crystal structure, thermal behavior, and IR studies are reported for the ba... more Chemical preparation, crystal structure, thermal behavior, and IR studies are reported for the barium cesium cyclotriphosphate dihydrate BaCsP 3 O 9 .2H 2 O and its anhydrous form BaCs 4 (PO 3) 6 .Ba Cs P 3 O 9 .2H 2 O, isotypic to BaTlP 3 O 9 .2H 2 O and BaNH 4 P 3 O 9 .2H 2 O, is monoclinic P21/n with the following unit cell dimensions: a = 7.6992(2)Å, b = 12.3237(3)Å, c = 11.8023(3)Å, α = 90 (2) , β = 101.18(5) , γ = 90. (3) , and Z = 4. The total dehydration of BaCsP 3 O 9 .2H 2 O is between 100 C and 580 C. The IR absorption spectroscopy spectrum for the crystal confirms that most of the vibrational modes are comparable to similar cyclotriphosphates and to the calculated frequencies. The thermal properties reveal that the compound is stable until 90 C.

Acta Crystallographica Section A Foundations and Advances, 2018

Chemical Communications, 2019

We report for the first time, the performance of black pearl (BP) carbon as an electrocatalyst in... more We report for the first time, the performance of black pearl (BP) carbon as an electrocatalyst in all-vanadium redox-flow-batteries.

International Journal of Science and Research (IJSR), 2016

Industrial phosphoric acid contains free metal impurities and / or complexed one. Moreover, each ... more Industrial phosphoric acid contains free metal impurities and / or complexed one. Moreover, each element of the chemical forms and each proportion's form are still unknown. However, the total contents of each element have been known up to now. It is necessary restraining the elimination or recuperation of the species in solution, to understand their deportment and know what form they may exist. This work examin the behavior and speciation of iron sulfate's ions by monitoring the kinetics reaction of the iron sulfate's dissociation in the phosphoric acid in various capacities (1-5.5 M) and by the characterization of the product precipitated by the ray X diffractions. The results obtained have allowed us to determine the equilibrium time of the dissociation reaction of iron sulfates in different phosphoric acid milieu at ambient temperature and the influence of acid content on the sulfate ions (SO 4 2-) and iron II (Fe 2+) behavior. This work allowed us to retain the variation of the phosphoric acid content has no significant influence on the equilibrium time of the dissociation reaction of the iron sulfates or on the precipitated product nature and the precipitated structural analysis confirms the absence of iron phosphate (Fe 3 (PO 4) 2) and the compound obtained is always iron sulfates (FeSO 4).

Journal of Optoelectronics and Advanced Materials

The corrosion inhibition of mild steel in 1 M HCl solution by sodium triphosphate (STPP), Na5P3O1... more The corrosion inhibition of mild steel in 1 M HCl solution by sodium triphosphate (STPP), Na5P3O10, has been studied using potentiodynamic polarisation as an electrochemical technique, weight loss and UV–vis spectrophotometric measurement. The results of weight loss and Tafel polarization measurements showed that this compound has fairly good inhibiting properties for steel corrosion in acidic bath, with 87% inhibition efficiency at optimum concentration 10-3 M. The inhibition is of a mixed anodic–cathodic nature. The adsorption behaviour of the investigated compound is found to obey Langmuir adsorption isotherm. Negative value was calculated for the energy of adsorption indicating the spontaneity of the adsorption process. The formation of complex between metal cations and sodium triphosphate is also proposed as additional inhibition mechanism of mild steel corrosion.

Structural modifications of cyclophosphates of manganese from Mn3(P3O9)2.10H2O to Mn2P4O12 during... more Structural modifications of cyclophosphates of manganese from Mn3(P3O9)2.10H2O to Mn2P4O12 during thermal behavior process Aziz KHEIREDDINE, Ismaïl FAHIM, Malika TRIDANE, Said BENMOKHTAR and Said BELAAOUAD Laboratoire chimie physique des matériaux – Faculté des sciences Ben M’sik- Université Hassan II Mohammedia – Casablanca, Maroc. Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphate Mn3(P3O9)2.10H2O. Mn3(P3O9)2.10H2O is monoclinic P21/n with the following unit-cell dimensions : a = 9.631(5)Å, b = 18,173(7)Å, c = 7,976(4), b = 109,438(4)° and Z = 2. Mn3(P3O9)2.10H2O has never been studied except its crystallographic characterization. The thermal behavior of Mn3(P3O9)2.10H2O has been investigated and interpreted by comparison with IR absorption spectrometry, X-ray diffraction experiments, chemical analyses, thermal analyses (TGA-DTA) and differential scanning calorimetry (DSC ) Mn3(P3O9)2.10H2O is stable, in the conditions of temperature...

Mediterranean Journal of Chemistry, 2013

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphates Pb3(P3O9)2.3H2O and Cd3(P3O9)2.14H2O. The later cyclotriphosphates have never been studied except their crystallographic characterization and are stable in the conditions of temperature and pressure of our laboratory until 343K. The final products of the dehydration and calcination of Pb3(P3O9)2.3H2O and Cd3(P3O9)2.14H2O, under atmospheric pressure, are respectively their long chain polyphosphates, [Pb(PO3)2]âˆž and Î²[Cd(PO3)2]âˆž. The intermediate product of the dehydration of Cd3(P3O9)2.14H2O, under atmospheric pressure, is its long chain polyphosphate form Î±, Î±[Cd(PO3)2]ï‚¥. [Pb(PO3)2]âˆž and Î²[Cd(PO3)2]âˆž are stable until their melting points at respectively 946K and 1153K. Two different methods, Ozawa and KAS have been selected in order to study the kinetics of thermal behavior of the cyclotriphosphates Pb3(P3O9)2.3H2O and Cd3(P3O9)2.14H2O for the first time. The kinetic and...

Powder Diffraction, 2011

Methods of chemical preparation and XRD data are reported for a new triphosphate CuNa3P3O10 and t... more Methods of chemical preparation and XRD data are reported for a new triphosphate CuNa3P3O10 and two cyclotriphosphates SrRbP3O9·3H2O and SrRbP3O9. SrRbP3O9·3H2O was prepared by the method of ion-exchange resin, while CuNa3P3O10 and SrRbP3O9 were obtained by total dehydration of CuNa3P3O10·12H2O and SrRbP3O9·3H2O, respectively. CuNa3P3O10 crystallizes in the hexagonal system, with space group P-31c, Z=2, and the following unit-cell dimensions: a=b=7.022(1) Å, c=9.217(1) Å, M(20)=81, F(20)=117(0.003 419, 50), and V=393.24(2) Å3. SrRbP3O9·3H2O is orthorhombic, with Z=4, space group Pnma, and the following unit-cell dimensions: a=9.120(1) Å, b=8.141(1) Å, c=15.234(1) Å, M(20)=5.1, F(20)=5.8(0.0173,199), and V=1131.1(3) Å3. SrRbP3O9 is monoclinic, with space group P21/m or P21, Z=4, and the following unit-cell dimensions: a=14.958(3) Å, b=8.503(2) Å, c=7.898(2) Å, β=122.19(2)°, M(20)=9.9, F(20)=16.5(0.0189, 64), and V=850.2(8) Å3.

Powder Diffraction, 2012

Methods of chemical preparation and XRD data are reported for four cyclotriphosphates associated ... more Methods of chemical preparation and XRD data are reported for four cyclotriphosphates associated with barium alone and with ammonium and thallium. These phosphates are Ba3(P3O9)2·4H2O, BaNH4P3O9·2H2O, BaTlP3O9·2H2O, and BaTlP3O9·Ba3(P3O9)2·4H2O was prepared by the direct method of chlorures, BaNH4P3O9·2H2O and BaTlP3O9·2H2O by the method of ion-exchange resin, and BaTlP3O9 by total dehydration of BaTlP3O9·2H2O. Ba3(P3O9)2·4H2O is monoclinic, space group P21/n, Z = 4, with a = 7.546(3), b = 12.105(4), c = 11.649(4) Å, β = 100.340(3)°, V = 1046.8(2) Å3, M(20) = 81, and F(20) = 117(0.003 419, 50). BaNH4P3O9·2H2O is monoclinic, space group P21/n, Z = 4, with a = 7.547(1), b = 12.065(1), c = 11.697(1) Å, β = 101.111(1)°, V = 1045.1(3) Å3, M(20) = 9 (AV.EPS = 0.000 116 9), and F(20) = 14(0.0287 06, 53). BaTlP3O9·2H2O is monoclinic, space group P21/n, Z = 4, with a = 7.546(3), b = 12.105(4), c = 11.649(4) Å, β = 100.340(3)°, V = 1046.8(2) Å3, M(20) = 81, and F(20) = 117(0.003 419, 50). BaN...

Phosphorus Research Bulletin, 2007

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphate Ca 3 (P 3 O 9) 2. 10H 2 O. Ca 3 (P 3 O 9) 2. 10H 2 O is monoclinic P2 1 /n with the following unit-cell dimensions : a = 9.332(7)Å, b = 18.13(1)Å, c = 7.841(5), β = 106.69(5)° and Z = 2. Ca 3 (P 3 O 9) 2. 10H 2 O has never been studied except for its crystallographic characterization. The thermal behavior of Ca 3 (P 3 O 9) 2 .10H 2 O has been studied and interpreted by comparison with IR absorption spectrometry, X-ray diffraction experiments, chemical analyses, thermal analyses (TGA-DTA) and differential scanning calorimetry (DSC). Ca 3 (P 3 O 9) 2. 10H 2 O is stable, in the conditions of temperature and pressure of our laboratory, until 80°C. It is impossible to dehydrate Ca 3 (P 3 O 9) 2. 10H 2 O without breaking its rings P 3 O 9 3and leading to amorphous compounds in X-ray diffraction and IR absorption spectrometry. The final product of the dehydration and calcination of Ca 3 (P 3 O 9) 2. 10H 2 O, under atmospheric pressure is its long chain polyphosphate form β, β[Ca(PO 3) 2 ] ∞. β[Ca(PO 3) 2 ] ∞ is stable until its melting point at 1097°C. On the other hand, β[Ca(PO 3) 2 ] ∞ is prepared by dry way. β[Ca(PO 3) 2 ] ∞ has many applications in industry such as humidity sensor and corrosion inhibitor. Also, quantum chemical calculations have been performed for the P 3 O 9 rings.

Journal of Alloys and Compounds, 2009

Journal of Power Sources, 2019

Abstract NASICON-type Na4MnV(PO4)3 with reduced graphene oxide (rGO) has been synthesized by the ... more Abstract NASICON-type Na4MnV(PO4)3 with reduced graphene oxide (rGO) has been synthesized by the simple sol-gel reaction and characterized by different analytical techniques. The resulted material has been explored as a cathode material for rechargeable non-aqueous and aqueous sodium-ion batteries. In non-aqueous electrolytes, the as-synthesized Na4MnV(PO4)3-rGO composite shows stable discharge capacity of 86 mAh g−1 at 0.1 C and 68 mAh g−1 at 0.2 C after 100 cycles in half-cell and full-cell configurations, respectively. In aqueous electrolytes, it delivers an initial discharge capacity of 92 mAh g−1 at 1 C rate in half-cells and 97 mAh g−1 at 10 C rate in full-cells having NaTi2(PO4)3-MWCNT as the anode. Stable cycleability and high rate capabilities of Na4MnV(PO4)3-rGO composite can be attributed to the very strong and sustainable conductive percolation networks for both electrons and Na+ ions. The obtained results reveal that the aqueous electrolyte cell has a huge scope for gird level energy storage applications.

Phosphorus, Sulfur, and Silicon and the Related Elements

Phosphorus Research Bulletin, 2007

... Said Belaaouad*, Malika Tridane, Hind Chennak, Rachid Tamani, Abdelkebir Kenz,Mohammed Moutaa... more ... Said Belaaouad*, Malika Tridane, Hind Chennak, Rachid Tamani, Abdelkebir Kenz,Mohammed Moutaabbid (*Corresponding author : sbelaaouad@gmail.com) Laboratoire de Recherches de Chimie-Physique Générale des Matériaux, BP 7955. ...

Mediterranean Journal of Chemistry, 2013

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O. The later cyclotriphosphates have never been studied except their crystallographic characterization and are stable in the conditions of temperature and pressure of our laboratory until 343K. The final products of the dehydration and calcination of Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, are respectively their long chain polyphosphates, [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ . The intermediate product of the dehydration of Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, is its long chain polyphosphate form α, α[Cd(PO 3 ) 2 ]  . [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ are stable until their melting points at respectively 946K and 1153K. Two different methods, Ozawa and KAS have been selected in order to study the kinetics of thermal behavior of the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O for the first time.

Materials Research Bulletin, 2002

Chemical preparation, crystallographic characterization and vibrational studies are reported for ... more Chemical preparation, crystallographic characterization and vibrational studies are reported for two new condensed phosphates associated to nickel-rubidium NiRb 4 (P 3 O 9 ) 2 and strontium-thallium SrTl 4 (P 3 O 9 ) 2 . SrTl 4 (P 3 O 9 ) 2 was prepared by the method of ion-exchange resin and NiRb 4 (P 3 O 9 ) 2 was obtained by total thermal dehydration of NiRb 4 (P 3 O 9 ) 2 .6H2O. SrTl 4 (P 3 O 9 ) 2 is rhombhoedral , Z = 2, space group P-31c, with the following unit-cell parameters : a = 7,424(1) Å, c = 20,176(2) Å and V = 2807.46(2) (Å 3 ). NiRb 4 (P 3 O 9 ) 2 is triclinic, Z = 2, space group P-1, with the following unit-cell parameters : a = 8,046(9) Å , b = 9,733(0) Å, c = 4,327(5) Å, α = 98.053°, β = 88.616°, γ = 84.761° and V = 333,95(2) (Å 3 ). Vibrational study is also reported for the title compounds.

Materials Research Bulletin, 2002

Mediterranean Journal of Chemistry, 2013

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O. The later cyclotriphosphates have never been studied except their crystallographic characterization and are stable in the conditions of temperature and pressure of our laboratory until 343K. The final products of the dehydration and calcination of Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, are respectively their long chain polyphosphates, [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ . The intermediate product of the dehydration of Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, is its long chain polyphosphate form α, α[Cd(PO 3 ) 2 ]  . [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ are stable until their melting points at respectively 946K and 1153K. Two different methods, Ozawa and KAS have been selected in order to study the kinetics of thermal behavior of the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O for the first time.

Chemical Data Collections, 2018

Chalcogen Chemistry, Feb 20, 2019

Acta Crystallographica Section A Foundations and Advances, 2018

Chemical Communications, 2019

International Journal of Science and Research (IJSR), 2016

Journal of Optoelectronics and Advanced Materials

Mediterranean Journal of Chemistry, 2013

Powder Diffraction, 2011

Powder Diffraction, 2012

Phosphorus Research Bulletin, 2007

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphate Ca 3 (P 3 O 9) 2. 10H 2 O. Ca 3 (P 3 O 9) 2. 10H 2 O is monoclinic P2 1 /n with the following unit-cell dimensions : a = 9.332(7)Å, b = 18.13(1)Å, c = 7.841(5), β = 106.69(5)° and Z = 2. Ca 3 (P 3 O 9) 2. 10H 2 O has never been studied except for its crystallographic characterization. The thermal behavior of Ca 3 (P 3 O 9) 2 .10H 2 O has been studied and interpreted by comparison with IR absorption spectrometry, X-ray diffraction experiments, chemical analyses, thermal analyses (TGA-DTA) and differential scanning calorimetry (DSC). Ca 3 (P 3 O 9) 2. 10H 2 O is stable, in the conditions of temperature and pressure of our laboratory, until 80°C. It is impossible to dehydrate Ca 3 (P 3 O 9) 2. 10H 2 O without breaking its rings P 3 O 9 3and leading to amorphous compounds in X-ray diffraction and IR absorption spectrometry. The final product of the dehydration and calcination of Ca 3 (P 3 O 9) 2. 10H 2 O, under atmospheric pressure is its long chain polyphosphate form β, β[Ca(PO 3) 2 ] ∞. β[Ca(PO 3) 2 ] ∞ is stable until its melting point at 1097°C. On the other hand, β[Ca(PO 3) 2 ] ∞ is prepared by dry way. β[Ca(PO 3) 2 ] ∞ has many applications in industry such as humidity sensor and corrosion inhibitor. Also, quantum chemical calculations have been performed for the P 3 O 9 rings.

Journal of Alloys and Compounds, 2009

Journal of Power Sources, 2019

Phosphorus, Sulfur, and Silicon and the Related Elements

Phosphorus Research Bulletin, 2007

Mediterranean Journal of Chemistry, 2013

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O. The later cyclotriphosphates have never been studied except their crystallographic characterization and are stable in the conditions of temperature and pressure of our laboratory until 343K. The final products of the dehydration and calcination of Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, are respectively their long chain polyphosphates, [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ . The intermediate product of the dehydration of Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, is its long chain polyphosphate form α, α[Cd(PO 3 ) 2 ]  . [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ are stable until their melting points at respectively 946K and 1153K. Two different methods, Ozawa and KAS have been selected in order to study the kinetics of thermal behavior of the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O for the first time.

Materials Research Bulletin, 2002

Mediterranean Journal of Chemistry, 2013

Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphat... more Chemical preparation, thermal behavior, kinetic and IR studies are given for the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O. The later cyclotriphosphates have never been studied except their crystallographic characterization and are stable in the conditions of temperature and pressure of our laboratory until 343K. The final products of the dehydration and calcination of Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, are respectively their long chain polyphosphates, [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ . The intermediate product of the dehydration of Cd 3 (P 3 O 9 ) 2 .14H 2 O, under atmospheric pressure, is its long chain polyphosphate form α, α[Cd(PO 3 ) 2 ]  . [Pb(PO 3 ) 2 ] ∞ and β[Cd(PO 3 ) 2 ] ∞ are stable until their melting points at respectively 946K and 1153K. Two different methods, Ozawa and KAS have been selected in order to study the kinetics of thermal behavior of the cyclotriphosphates Pb 3 (P 3 O 9 ) 2 .3H 2 O and Cd 3 (P 3 O 9 ) 2 .14H 2 O for the first time.