Synthesis, characterization and structure refinement of sodium zirconium molibdo-phosphate: Na0.9Zr2Mo0.1P2.9O12 (MoNZP)

Chourasia, Rashmi; Shrivastava, O. P.; Wattal, P.K.

doi:10.1016/j.jallcom.2008.06.074

Cited by 16 publications

(5 citation statements)

References 31 publications

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“…Some XRD data of representative samples were gathered from 10° to 80°. The Rietveld method was adopted to investigate the crystal structure refinement in the General Structure Analysis System (GSAS) program . All of the excitation and emission spectra were measured by the Jobin Yvon FluoroMax-4 machine produced in France.…”

Section: Methodsmentioning

confidence: 99%

Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Che

Song

et al. 2020

Inorg. Chem.

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A modified structure Ca(Mg0.8Al0.2)(Si1.8Al0.2)O6 (denoted as CMASO) from the evolution of CaMgSi2O6 (denoted as CMSO) codoped with Ce3+ and Tb3+ ions was designed successfully by solid reaction method for application in phosphor-converted white-light-emitting diode (pc-wLED). The Rietveld refinement of these two structures verified the changes derived from the replacement of some of the Mg2+ and Si4+ ions by Al3+ ions. The band gaps were calculated by density-functional theory (DFT) calculation method to verify the change of Al3+ ions replacing further, and the diffuse reflectance spectra (DRS) proved the veracity of the calculation result. The phosphors CMASO:Ce3+ showed blue emission excited by a wider excitation wavelength from 280 nm to 370 nm. The change of structure lead to the absorbable range broaden and the emission peak shifted to longer wavelength, compared with CMSO:Ce3+, although the amount of emitting center was the same. The reason for these phenomena was discussed in detail. The codoped phosphors CMASO:Ce3+,Tb3+ exhibited different emission colors from blue to green as the concentration of Tb3+ ions increased. Combined with commercial red phosphor CaAlSiN3:Eu2+ and ultraviolet LED (UV-LED) chips, the selected appropriate samples achieved white emission. The correlated color temperature (CCT) was 6137 K and the color rendering index (Ra) was 80.5, indicating that they could act as potential phosphors for possible applications in pc-wLED.

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Section: Methodsmentioning

confidence: 99%

Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Che

Song

et al. 2020

Inorg. Chem.

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“…Na0.9Zr2P2.9Mo0.1O12, 33 and Ba0.5Sr0.5Co0.8Fe0.2O3-δ. 34 The reliability factors of Rp and Rwp as listed in Table 1 indicate the good quality of the simulation.…”

Section: Phase Structuresmentioning

confidence: 98%

La0.4Bi0.4Sr0.2FeO3-δ as Cobalt-free Cathode for Intermediate-Temperature Solid Oxide Fuel Cell

Ren

Zhu

et al. 2016

Electrochimica Acta

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La0.4Bi0.4Sr0.2FeO3-δ (LBSF) has previously been demonstrated to show the highest electrochemical performance in a series of bismuth doped lanthanum strontium ferrite La0.8-xBixSr0.2FeO3-δ where 0  x  0.8 as the cathode for intermediate-temperature solid oxide fuel cells. The cobalt-free electrocatalyst LBSF is further investigated in the present study using thermogravimetric analysis, oxygen temperature-programmed desorption method, iodometric titration and high-temperature X-ray diffraction refinement methods to reveal its structural properties including oxygen non-stoichiometry coefficient (δ), valence state of Fe, and lattice parameters at the different temperatures. In addition, the oxygen reduction process on the single phase LBSF is explored using the distribution of relaxation time method based on the electrochemical impedance spectroscopy measurements conducted in oxygen partial pressure from 0.01 to 1.0 atm. The LBSF cathode electrochemical performance is effectively improved by cooperating Sm0.2Ce0.8O1.9 (SDC), an oxygen ion conductor, resulting in interfacial polarization resistance less than 0.1 Ω cm 2 at 700 °C when SDC is used as the electrolyte.

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“…The framework structure is built from anions such as

{PO}_{4}^{3 -}

{normalP}_{2} {normalO}_{7}^{4 -}

{normalP}_{3} {normalO}_{9}^{3 -}

and P 4 O 10 5− sharing corners or edges with MO x polyhedra. The structural flexibility combined with their high chemical stability makes these phosphates as potential materials for (i) secondary lithium batteries , (ii) ionic conductors , (iii) photocatalysis as water oxidation catalysts and oxidation of organic dyes , (iv) optical devices, fluorescent lamps, plasma display panels and long‐term storage of radioactive waste . Further, phosphate matrix is found to be an excellent host for lasing ions .…”

Section: Introductionmentioning

confidence: 99%

Cation‐ and Anion‐Substituted Potassium Manganese Phosphate, KMnP₃O₉: Luminescence and Photocatalytic Studies

Chandiri

Ravi

Kurra

et al. 2017

Photochem & Photobiology

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Phosphates as multifunctional materials were of vital importance in the environmental and energy fields. In the present work, a new cyclophosphate, potassium manganese phosphate (KMnP O ) (hereafter KMPO), was prepared by solid state method. Cations (Ag and Cu ) and anion (N ) were substituted into KMPO lattice via ion-exchange and solid state methods, respectively. The as-prepared materials were characterized by powder X-ray diffraction, SEM-EDS and UV-visible diffuse reflectance spectra. Rietveld refinement was carried out for parent material. All the prepared materials were found to crystallize in the hexagonal lattice and isomorphous with KCoP O . The nitrogen content in N -substituted KMPO was estimated by EDS and O-N-H analysis. The bandgap energy of the cation- and anion-substituted samples was lower compared to that of pristine KMPO. Gouy method was employed to determine the magnetic susceptibility of KMPO. The photoluminescence property of Mn in all the samples was studied, and the color coordinates were calculated using CIE 1931 chromaticity. The photocatalytic activity of visible light active material, N -substituted KMPO, was examined against the degradation of methylene blue and methyl violet at ambient conditions.

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Synthesis, characterization and structure refinement of sodium zirconium molibdo-phosphate: Na0.9Zr2Mo0.1P2.9O12 (MoNZP)

Cited by 16 publications

References 31 publications

Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

La0.4Bi0.4Sr0.2FeO3-δ as Cobalt-free Cathode for Intermediate-Temperature Solid Oxide Fuel Cell

Cation‐ and Anion‐Substituted Potassium Manganese Phosphate, KMnP₃O₉: Luminescence and Photocatalytic Studies

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Synthesis, characterization and structure refinement of sodium zirconium molibdo-phosphate: Na0.9Zr2Mo0.1P2.9O12 (MoNZP)

Cited by 16 publications

References 31 publications

Ca(Mg0.8Al0.2)(Si1.8Al0.2)O6:Ce3+,Tb3+ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Ca(Mg0.8Al0.2)(Si1.8Al0.2)O6:Ce3+,Tb3+ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

La0.4Bi0.4Sr0.2FeO3-δ as Cobalt-free Cathode for Intermediate-Temperature Solid Oxide Fuel Cell

Cation‐ and Anion‐Substituted Potassium Manganese Phosphate, KMnP3O9: Luminescence and Photocatalytic Studies

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Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Ca(Mg_0.8Al_0.2)(Si_1.8Al_0.2)O₆:Ce³⁺,Tb³⁺ Phosphors: Structure Control, Density-Functional Theory Calculation, and Luminescence Property for pc-wLED Application

Cation‐ and Anion‐Substituted Potassium Manganese Phosphate, KMnP₃O₉: Luminescence and Photocatalytic Studies