Thermal behaviour of mixed tetravalent metal salts

Szirtes, L.; Poko, Z.; Shakshooki, S. K.; Ahmed, M.F.; Dehair, A.; Benhamed, A.

doi:10.1007/bf02057245

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…A comparison of these findings with those on mixed crystalline zirconiumtitanium phosphates prepared by the reflux method and dried in air or above P205 [1] revealed their similar thermal behaviour.…”

Section: Resultsmentioning

confidence: 60%

Thermal behaviour of acidic salts of mixed tetravalent metals

Shakshooki¹,

Khalil²,

Abuhamaira³

et al. 1992

Journal of Thermal Analysis

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Section: Resultsmentioning

confidence: 60%

Thermal behaviour of acidic salts of mixed tetravalent metals

Shakshooki¹,

Khalil²,

Abuhamaira³

et al. 1992

Journal of Thermal Analysis

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“…Their layered crystalline materials, resemblance clay minerals, exist as two dimensional (2-D) and threedimensional (3-D) structures, have the general formulae of α-M(iv)(HPO 4 ) 2 . H 2 O, Ө-M(iv)(HPO 4 ) 2 .5H 2 O and γ-M(iv).PO 4 .H 2 PO 4 .2H 2 O, (where M = Ti, Zr, Hf, Ge, Sn, Ce etc) have been established Clearfield [25], Szirtes, et al [28], Shakshooki, et al [26], Alberti, et al [23]. α-Layered mixed zirconium-titanium phosphates, Zr x Ti (1x) (HOP 4 ) 2 .H 2 O(α-Zr x Ti 1-x P), (0 ≤ x ≤ 1),are known, Shakshooki, et al [26], To date there have been very little work on layered α-zirconium-tin phosphates.…”

Section: Introductionmentioning

confidence: 96%

Studies on Electrochemical Properties of Polycarbazole Prepared Via Self-Support Polymerization and Self-Doping

Shakshooki¹,

El-Akari²,

Abouderbala³

et al. 2023

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Mixed glassy zirconium-tin phosphate, g-Zr0.64.Sn.0.36(HPO4)2.3H2O(g-ZrSnP), nano fibrous cerium phosphate, Ce(HPO4)2 2,9H2O(nCePf), and mixed glassy zirconium-tin phosphate / fibrous cerium phosphate nanocomposite membrane, [g-Zr0.64 Sn0.36 (HPO4)2]0.25 [Ce(HPO4)2]0.75 ..4.43H2O, were prepared and characterized. By chemical , x-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform spectroscopy (FTIR), Zirconium tin mole ratio were estimated using (EDAX). Novel [g-Zr0.64 Sn0.36 (HPO4)2]0.25 [Ce(HPO4)2]0.75 / polycarbazole nanocomposite membrane was prepared via self-support polymerization of carbazole, which was promoted by the reduction of Ce(iv) phosphate present in the inorganic matrix. Possible explanation is nCePf present on the surface of the nanocomposite is attacked by carbazole, converted to cerium (III) orthophosphate(CePO4). The resultant polycarbazole was characterized by C,H,N analysis, SEM ,FT-IR. UV-Vis and electrical conductance measurements. From elemental (C,H,N) analysis, the amount of polycarbazole present in the composite found to be (2.15 % in wt.). Polycarbazole is considered as one of modern material used in solar cells, furthermore it has become an important material for optoelectronic applications in recent years. The dc conductivity of polycarbazole nanocomposite membrane at 280C (using RC-Circuit) found to be equal to 3x10-5 Scm-1, range of semi-conductors. We suggest self-doping occurred on polymerization, which is due to H+ present in (O3POH)2 groups of [g-Zr0.64 Sn0.36 (HPO4)2]0.25. The electrochemistry of resultant polycarbazole in acetonitrile solution for a range of concentrations from 1.06 x10-4 to 2.19 x 10–3 mol dm-3 was carried out using CV techniques. Investigation of its electrochemical properties affords insight into the mechanisms for their oxidation and reduction, therefore provides the basis for evaluating the stabilities of the material and for designing novel polycarbazole-derived materials with desired properties as well as new devices. That will be discussed.

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“…The organic derivatives were identified by analytical, X-ray powder diffraction and IR spectrophotometric methods under the conditions described earlier [4]. The thermal behaviour of the materials was investigated with a MOM-C derivatograph under the conditions described earlier [5].…”

Section: Experimental Preparationsmentioning

confidence: 99%

Thermal decomposition of organic derivatives of crystalline zirconium phosphate-phosphite

Rajeh

Szirtes

1991

Journal of Thermal Analysis

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Organic derivatives of crystalline zirconium phosphate-phosphite (ZrPP) are easily obtained by direct contact of the given organic solution with the crystalline material. The thermal decomposition of benzyl alcohol, benzylamine and some other aromatic compounds intercalated in ZrPP was examined. All examined samples lose their crystal water first at a relatively low temperature. The structural water is lost at a relatively higher temperature (in comparison with the crystalline a-zirconium phosphate derivatives).The zirconium phosphate-phosphite (ZrPP) ion-exchanger was first investigated by Alberti and coworkers [1, 2], and we investigated the effects of modification of the preparation method and the mode of preparation of organic derivatives of this material [3,4]. The double-layered ZrPP is a good intercalating agent for organic molecules containing COOH and/or NH2 groups.As part of this work, the thermal stability and thermal decomposition of organic derivatives were studied, and the results of these investigations are presented in this paper. Experimental PreparationsPreparations were carried out as follows: in each case, 100 ml of a saturated solution of the organic molecule added dropwise to 1.0 g of zirconium phosphate-phosphite (ZrPP). The ZrPP was equilibrated with this solution for five days at room temperature.

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Thermal behaviour of mixed tetravalent metal salts

Cited by 7 publications

References 4 publications

Thermal behaviour of acidic salts of mixed tetravalent metals

Thermal behaviour of acidic salts of mixed tetravalent metals

Studies on Electrochemical Properties of Polycarbazole Prepared Via Self-Support Polymerization and Self-Doping

Thermal decomposition of organic derivatives of crystalline zirconium phosphate-phosphite

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