Formation region and structural model of γ-zirconium phosphate
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Polymer-encapsulated crystalline zirconium phosphates as NH<inf>4</inf><sup>+</sup> and K<sup>+</sup> ion exchangers for application in sorbent dialysis cartridges
2022, Journal of Water Process EngineeringCitation Excerpt :Compared to the α-ZrP analogues, γ-ZrP has a larger basal spacing of 12.25 Å and a corresponding larger interlayer spacing which reduces diffusion constraints to the ion-exchange sites [21]. The synthesis of crystalline zirconium phosphates requires excess phosphates and is energy intensive and time consuming, requiring reflux or hydrothermal treatment for days to weeks to achieve the desired crystallinity [22–25]. Recently, our laboratory has successfully developed a convenient protocol to prepare crystalline zirconium phosphates of different phases (α and γ) [19,21,26].
Rapid synthesis of α-Sn(HPO<inf>4</inf>)<inf>2</inf>·H<inf>2</inf>O by microwave-hydrothermal process
2021, Ceramics InternationalCitation Excerpt :They can also be prepared by the direct precipitation method in the presence of hydrofluoric acid [18,19]. Yamanaka and Tanaka [20] investigated the formation region of various crystalline Zr phosphates as a function of pH and temperature using zirconium oxychloride and disodium hydrogen phosphate or sodium dihydrogen phosphate as the precursor chemicals under hydrothermal conditions. Using the above methods, crystalline materials were obtained after prolonged refluxing or hydrothermal treatment spanning from several hours to days.
Mechanism and kinetic parameters of glucose and fructose dehydration to 5-hydroxymethylfurfural over solid phosphate catalysts in water
2018, Catalysis TodayCitation Excerpt :Different phases of Zirconium hydrogen phosphate (Zr(HPO4)2) were obtained after the calcination of original zirconium (IV) hydrogen phosphate (Sigma-Aldrich, CAS number: 13772-29-7). This material changes phases after exposed them to calcination at 620–650 °C and 1100 °C, according to reported in the literature [7,31]. Consequently, calcinations in this study were carried out in nitrogen up to 700 °C for 2 h, with a heating rate of 10 °C/min.
Titanium phosphate surfactants intercalation compounds: Thermal and structural characterization
2007, Materials Research Bulletin
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Present address: Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Hiroshima 730, Japan.