aqueous solution containing ZnCl2 and Na2HPO4. A zinc oxide was also synthesized under the same conditions by precipitation from aqueous ZnCl2. Addition of Na2CO3 to the medium and heating at 323-343 K for 6 h gave rise to NaZnPO4 (solid NaZnP) and ZnO, respectively, both of which were found to exhibit excellent activity in the dehydrogenation of cyclohexanol. XRD and IR analyses revealed amorphous Na2CO3
在该工作中,通过从包含ZnCl 2和Na 2 HPO 4的水溶液中沉淀来合成Zn 3(PO 4)2(固体ZnP)。在相同条件下,还通过从ZnCl 2水溶液中沉淀来合成氧化锌。向介质中添加Na 2 CO 3并在323-343 K下加热6 h ,分别生成NaZnPO 4(固体NaZnP)和ZnO,发现它们在环己醇的脱氢中均表现出优异的活性。XRD和IR分析显示无定形Na 2 CO 3沉积在固体表面上,以及由于形成的ZnCO 3分解而可能残留的氧化锌。固体表面上Na 2 CO 3的存在增加了其碱性,并抑制了环己醇的脱水。在773 K下,Zn 3(PO 4)2产生环己烯和环己酮,而在相同的反应条件下,NaZnPO 4选择性地产生酮。
Structural Polymorphism in Na<sub>4</sub>Zn(PO<sub>4</sub>)<sub>2</sub> Driven by Rotational Order–Disorder Transitions and the Impact of Heterovalent Substitutions on Na-Ion Conductivity
作者:Sujoy Saha、Gwenaëlle Rousse、Matthieu Courty、Yaroslava Shakhova、Maria Kirsanova、François Fauth、Vladimir Pomjakushin、Artem M. Abakumov、J. M. Tarascon
DOI:10.1021/acs.inorgchem.0c00612
日期:2020.5.4
series of structural transitions under temperature, which are associated with an increase in ionicconductivity by several orders of magnitude. Our detailed crystallographic study, combining electron, neutron, and X-ray powderdiffraction, reveals that the room-temperature form, α-Na4Zn(PO4)2, contains orientationally ordered PO4 groups, which undergo partial and full rotational disorder in the high-temperature
Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO<sub>4</sub>:Ce<sup>3+</sup>, Tb<sup>3+</sup> phosphors for UV-based LEDs
作者:K. Saidi、M. Dammak
DOI:10.1039/d0ra04163g
日期:——
A series of Ce3+, Tb3+ and, Ce3+/Tb3+ doped NaZnPO4(NZPO) phosphors synthesized via the high-temperature solid-state reaction method were investigated.
381(2) Å, b=8.507(1) Å, c=16.568(3) Å and Z=4. The structure is made up of 3D [Zn5P4O16]n2n− covalent framework consisting of [Zn4P4O16]n4n− layers. The powder diffraction pattern of Na9Zn21(PO4)17 is explained by simulating a theoretical pattern with NaZnPO4 and Na2Zn5(PO4)4 in the molar ratio of 1:4 and then by Rietveld refinement of experimental pattern. Na2Zn5(PO4)4 melts congruently at 855 °C and its
Spectroscopic characterization of pure and cation-stabilized sodium phosphate
作者:R. S. Cole、Roger Frech
DOI:10.1063/1.480971
日期:2000.3
was conducted of pure Na3PO4 and solid solutions of Na3PO4 doped with Mg2+ and Zn2+. Na3PO4 has two solid phases: a low-temperature tetragonal phase and a high-temperature cubic phase. A factor group analysis of the two phases yielded the expected number of modes and their symmetry-based assignments. A temperature-dependent Raman spectroscopic study was then performed for the pure compound. Analysis