Crystalline insoluble acid salts of tetravalent metals—XX Forward and reverse Cs+/H+ and Rb+/H+ ion exchange on crystalline zirconium phosphate

Alberti, G.; Costantino, U.; Allulli, S.; Massucci, M. A.

doi:10.1016/0022-1902(75)80316-2

Cited by 85 publications

(23 citation statements)

References 12 publications

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“…The pH abruptly increased from the first drop of addition of CsOH solution and the plateau appeared only after a pH value of 7. This is in a good agreement with the previous studies [13].…”

Section: Exchange Of Cesium Ionsupporting

confidence: 94%

“…It should be noted here that Cs + -H + exchange is complicated [13] where two phase transitions were found in the range 50-100 percent of conversion. At alkaline pH values, it is possible to exchange about two thirds of the H + ions with Cs + [14], although this is accompanied by a strong hydrolysis of phosphate groups of the exchanger [15].…”

Section: Exchange Of Cesium Ionmentioning

confidence: 81%

“…Fig. 7 Titration curves of cesium ion exchange on both samples L C , ( -ZrP, ), and its 50% Na + -exchanged product ( product) as shown by curves (1) and (2) respectively Curve (1) appears relatively smooth (with one plateau) if compared to the more complex one obtained in a previous investigation [13]. The difference between the two cases may arise from the fact that the present study adopted the continuous titration while the previous one used the batch-procedure.…”

Section: Exchange Of Cesium Ionmentioning

confidence: 83%

“…At alkaline pH values, it is possible to exchange about two thirds of the H + ions with Cs + [14], although this is accompanied by a strong hydrolysis of phosphate groups of the exchanger [15]. + exchange and the subsequent conversion from mono-to dicesium form [13]. This curve shows that crystalline ZrP can be easily converted into the monocesium form even in acid medium or low pH values if some Na + ions are previously added.…”

Section: Exchange Of Cesium Ionmentioning

confidence: 99%

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Synthesis and Characterization of Expanded Layer-Spacing Zirconium Phosphate by Ion-Exchange and Intercalation Processes

2010

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In a previous work [1], we prepared -Zr(HPO 4 ) 2 .2H 2 O (ZrP) by direct precipitation, reflux, and by sol-gel method. The results of characterization indicated that the properties of the resultant ZrP samples depended on the method and conditions of preparation as well as on the nature of precursor used. As an important factor governing the use of such layered phosphates, various modifications were done to enlarge the interlayer spacing of -ZrP (7.6 Å) to be suitable for exchange of large cations. This work aims to modify the interlayer spacing of -ZrP prepared from zirconium acetylacetonate complex and phosphoric acid. Two routes were used to achieve this goal; the first is by intercalation of acid -ZrP with n-butyl amine in its vapor-saturated atmosphere. The second route is by performing ion-exchange of the -ZrP protons by different cations.

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“…The pH abruptly increased from the first drop of addition of CsOH solution and the plateau appeared only after a pH value of 7. This is in a good agreement with the previous studies [13].…”

Section: Exchange Of Cesium Ionsupporting

confidence: 94%

Section: Exchange Of Cesium Ionmentioning

confidence: 81%

Section: Exchange Of Cesium Ionmentioning

confidence: 83%

Section: Exchange Of Cesium Ionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Characterization of Expanded Layer-Spacing Zirconium Phosphate by Ion-Exchange and Intercalation Processes

2010

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“…To this solution, 715 ml of 85% phosphoric acid were added. Instead of passing a stream of pre-humidified air 14 through the solution after being warmed at ca 80 °C, the solution was simply exposed to an infrared source of energy for 4 days where crystals of α-zirconium phosphate were slowly formed on the surface and the walls of the container and frequently settled down to the bottom of the beaker. After about 5 days, now further precipitation was noticed and the obtained crystals were easily filtered and washed with distilled water on a No.…”

Section: A) Precipitation From Hf (Sample A)mentioning

confidence: 99%

SYNTHESIS OF α-ZIRCONIUM PHOSPHATE FROM ACETYL ACETONATE SOLUTION; A COMPARATIVE SYNTHESIS STUDY OF α-ZrP

Ali

Hanna

Gad

2008

Phosphorus Research Bulletin

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Three main routes of synthesis; namely the reflux, the direct precipitation, and the sol-gel methods, are used to prepare α-zirconium phosphate α-Zr(HPO 4 ) 2 .2H 2 O or simply α-ZrP. Within each separate method of synthesis, different starting precursors and/or reaction conditions are tested for optimization to obtain the crystalline product. Different products were characterized using TGA-DTA data, SEM photos, N 2 -gas absorption-desorption measurements, and FT-IR absorption spectra. The products showed different extents of crystallinitiy as roughly or qualitatively shown by their XRD patterns. The results are explained on the basis of each synthesis route and reaction conditions. In contrast to the familiar results that the initial un-refluxed product of rapid precipitation is basically amorphous ZrP, a careful washing strategy confirmed that this is a crystalline ZrP contaminated with a minority of solid H with a 1:1 mixture of mono-and diethyl phosphates were amorphous. Chemical analysis shows a reasonable agreement between the experimental ratios of P/Zr and the calculated values. Compared to other methods of synthesis, the direct precipitation seems to be more efficient in obtaining a product of good yield and improved crystallinity.

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Einlagerungsverbindungen des Zirconiumphosphats

1976

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42] A. Dedieu u. A. Veillard, J. Am. Chem. Soc. 94,6730 (1972). [43] P. Cremaschi, A. Gamba u. M . Simonerfa, Theor. Chim. Acta 25. 237 [44] J . J. Dannenberg. noch unveroffentlicht. [45] Versuche mit diesem Ziel sind im Gange: M . Simonerra. personliche [46] J . J. Dannenberg, Angew. Chem. 87, 632 (1975); Angew. Chem. Int. [47] 1. J. Donnetiberg u. L. Miller, unveroffentlicht. (I 972). Mitteilung. Ed. End. 14, 641 (1975). Die Fahigkeit von Schichtverbindungen zur Bildung von Einlagerungsverbindungen setzt spezielle Strukturen und Bindungsverhaltnisse zwischen den Schichten voraus. Bis jetzt waren auDer Graphit nur wenige anorganische Schichtverbindungen bekannt, die neutrale Molekule zwischen die Schichten einlagern konnen: Kaolinit[lI, binare Sulfide wie TiSl und TaSJ 21 und kristalline Kiesel~auren[~! Wir haben gefunden, daD auch die kristallinen M'"-Phosphate M(HX04)2-nH20 rnit M=Zr, Si, Sn, Ce und X=P, As neutrale Molekule einlagern und eine g r o k Zahl neuer Einlagerungsverbindungen bilden. Als Beispiel sei Zirconiumphosphat Zr(HP04)2 . n H 2 0 (n=O, 1, 2) gewahlt. Die Schichtstruktur des Monohydrats wurde von Clearfieldt41 ermittelt und von Michel und Weisd'] durch Kationenaustauschversuche rnit langkettigen n-Alkylammonium-Ionen bestatigt.

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Crystalline insoluble acid salts of tetravalent metals—XX Forward and reverse Cs+/H+ and Rb+/H+ ion exchange on crystalline zirconium phosphate

Cited by 85 publications

References 12 publications

Synthesis and Characterization of Expanded Layer-Spacing Zirconium Phosphate by Ion-Exchange and Intercalation Processes

Synthesis and Characterization of Expanded Layer-Spacing Zirconium Phosphate by Ion-Exchange and Intercalation Processes

SYNTHESIS OF α-ZIRCONIUM PHOSPHATE FROM ACETYL ACETONATE SOLUTION; A COMPARATIVE SYNTHESIS STUDY OF α-ZrP

Einlagerungsverbindungen des Zirconiumphosphats

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