Investigations of crystalline structure of gamma-zirconium phosphate

Rajeh, A. O.; Szirtes, L.

doi:10.1007/bf02038050

Cited by 6 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Estimate of Mean Distance between Adjacent Metal Complexes. The structure of γ-ZrP is well-known, since the X-ray structure has been published. − After topotatic exchange of γ-ZrP, it is generally accepted that there is no significant modification of the original structure of γ-ZrP and that only the c axis is increased proportionally to the size of the intercalated guest. The original H 2 PO 4 - groups of γ-ZrP are replaced by phosphonate groups of the pillar compound, as schematically represented in Figure .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Photoinduced Energy Transfer between Ruthenium and Osmium tris-Bipyridine Complexes Covalently Pillared into γ-ZrP

et al. 2002

View full text Add to dashboard Cite

This paper describes the preparation and photophysical characterization of hybrid materials made of a γ-ZrP covalently pillared with two complexes: Ru(bpy)2L and Os(bpy)2L (bpy ) 2,2′-bipyridine and L ) 5,5′-bis(dihydroxyphosphoryl)-2,2′-bipyridine). A high degree of phosphate (H2PO4) exchange by the complexes in the γ-ZrP matrix was achieved (25% intercalation) by preintercalating the γ-ZrP with octylamine. Materials with different Os/Ru ratios were prepared, allowing the study of the efficiency of energy transfer as a function of the Ru/Os ratio (Ru/Os ratios ) 1/0, 1/0.35, 1/0.6, 1/0.8, 1/1, and 0/1). Powder X-ray diffraction shows that the interlayer space of the intercalated γ-ZrP is approximately 18.6 Å in all of the intercalated materials. Solid-state 31 P NMR confirms that the complexes are covalently bonded to the zirconium of the γ-ZrP phase. All of the materials exhibit moderately strong metal-to-ligand charge transfer (MLCT) emission from the Ru and/or Os chromophores. In the mixed samples the Ru-based emission is strongly quenched, indicating that in the γ-ZrP matrix rapid Ru to Os energy transfer occurs. On the basis of the lifetimes of the Ru MLCT luminescence, the energy transfer rate is estimated to be 2-3 × 10 8 s -1 for chromophores that are adjacent in the γ-ZrP matrix.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Complexes 4 and 5 can be considered as spheres having a diameter of 11.5 Å ,, and thus a cross sectional area of 104 Å 2 . In γ-ZrP, adjacent exchangeable H 2 PO 4 - groups are separated by 5.38 and 6.63 Å along the a and b axes of the unit cell, respectively. − …”

Section: Resultsmentioning

confidence: 99%

Photoinduced Energy Transfer between Ruthenium and Osmium tris-Bipyridine Complexes Covalently Pillared into γ-ZrP

et al. 2002

View full text Add to dashboard Cite

show abstract

“…ZrP C was synthesized (adapted from Rajeh and Szirtes [11]) by a refluxing method. 6.4 g of zirconium oxychloride octahydrate (Merck Millipore, USA) was dissolved in 20 mL of water and 55 g of sodium dihydrogen phosphate monohydrate (Sigma-Aldrich, USA) was dissolved in 40 mL of 3 mol⋅L −1 hydrochloric acid.…”

Section: Experimental Section 21 Synthesis Of Materialsmentioning

confidence: 99%

Effects of synthesis conditions on ion exchange properties of α-zirconium phosphate for Eu and Am

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Hydrated zirconium phosphate is one of the most extensively researched cation exchangers and previous studies have described several synthesis methods [17][18][19], its allotropes [20][21][22], as well as its different properties (ion-exchange capacity, thermal stability, ionic conductivity, and catalytic activity [23,24]). The simplest way of obtaining a zirconium phosphate-based inorganic cation-exchange membrane is by generating the exchanger in the porous network of a ceramic support and then fixing this by thermal treatment at a relatively low temperature (200ºC according to Linkov et al [12]).…”

Section: Introductionmentioning

confidence: 99%

Low-cost inorganic cation exchange membrane for electrodialysis: optimum processing temperature for the cation exchanger

Mestre

Pla

Palacios

et al. 2013

Desalination and Water Treatment

View full text Add to dashboard Cite

Mestre, S.; Sales, S.; Palacios, M.; Lorente, M.; Mallol, G.; Pérez-Herranz, V. (2013). Lowcost inorganic cation exchange membrane for electrodialysis: optimum processing temperature for the cation exchanger. Desalination and Water Treatment. 51(16-18):3317-3324. doi:10.1080/19443994.2012 AbstractThe optimum temperature for fixing zirconium phosphate, obtained by precipitation, on a low-cost ceramic support was determined in order to obtain an inorganic cation-exchange membrane for electrodialysis. Zirconium phosphate ion-exchange capacity maximised between 450ºC and 550ºC, thus it was considered the optimum processing temperature. The origin of this maximum was investigated by means of XRD and TG-EGA. Zirconium phosphate formation by precipitation in the porous network of the support was verified by SEM-EDX and mercury intrusion porosimetry. The membrane obtained after thermal treatment at 450 ºC displayed selectivity to the cations present in the spent rinse water of the chromium plating process. This property allows the recovery of chromium by removing the cations through the cation-exchange ceramic membrane.

show abstract

Investigations of crystalline structure of gamma-zirconium phosphate

Cited by 6 publications

References 9 publications

Photoinduced Energy Transfer between Ruthenium and Osmium tris-Bipyridine Complexes Covalently Pillared into γ-ZrP

Photoinduced Energy Transfer between Ruthenium and Osmium tris-Bipyridine Complexes Covalently Pillared into γ-ZrP

Effects of synthesis conditions on ion exchange properties of α-zirconium phosphate for Eu and Am

Low-cost inorganic cation exchange membrane for electrodialysis: optimum processing temperature for the cation exchanger

Contact Info

Product

Resources

About