Synthesis, crystal structure and electrical proprieties of new phosphate KCoP3O9

Smida, Youssef Ben; Guesmi, Abderrahmen; Georges, Samuel; Zid, Mohamed Faouzi

doi:10.1016/j.jssc.2014.09.026

Cited by 15 publications

(11 citation statements)

References 36 publications

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“…It is noticed that the d-lines of KMPO are consistent to that of the d-lines of KCo(PO 3 ) 3 (JCPDF No. 19-0947) which crystallizes in the hexagonal lattice with P6c2(188) space group (19). Hence, the structure of KMPO is expected to be similar with that of KCoP 3 O 9 .…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…Ball milling and appropriate sintering are two protocols showing good effects on relative densities of arsenates Ag 4 Co 7 (AsO 4 ) 6 [16] and Na 4 Co 7 (AsO 4 ) 6 [19], LAMOX materials [20,21], etc. However, these procedures seem to be less effective for phosphate materials, as reported for KCoP 3 O 9 [13] and NaCo(PO 3 ) 3 [15]. Otherwise, it has been shown in many previous works [16,17,20,21] that 120-min ball milling followed by sintering temperature optimization permits to obtain a dense ceramic synthesized by solidstate reaction with small grains of about 1 µm to 50 nm [16,17,20,21].…”

Section: Microstructure Controlmentioning

confidence: 95%

“…Besides, if the electrical properties of many phosphate or arsenate materials have been largely investigated, only few studies were devoted to the samples densification and then the relative density and to the different parameters that can have an effect on. Indeed, it has been demonstrated in many previous studies [13][14][15][16][17] that the electrical behavior is closely related to the relative density, which points out the importance of its control. Moreover, it has been shown in many works that the best densities were obtained for arsenates rather than phosphates [14][15][16][17].…”

Section: Introductionmentioning

confidence: 98%

The electrical behaviors of the melilite-like solid solutions Na2Co(P2−xAsx)O7 (x = 0.5; 1): effect of the P/As substitution on structure and electrical properties

et al. 2019

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The melilite-like Na 2 CoP 2 O 7 diphosphate, due to its structural features, is a promising material for sodium-ion battery cathodes. Aiming at improving the conduction properties of this phase, the P 5+ ions were partially substituted by As 5+ ones, and two Na 2 Co(P 2−x As x)O 7 (x = 0.5 and x = 1) solid solutions were synthesized. The purity of the obtained solid solutions was confirmed by powder X-ray diffraction, and their electrical properties were investigated using complex impedance spectroscopy. The effects of the P/As substitution on sintering temperature, relative density and ionic conductivity were studied. The mean particle size was reduced by ball milling. The sintering temperature decreased from 680 to 640 °C from the pure phosphate to the arsenic richest solid solution, respectively, and the relative density of the pellets obtained after 120-min ball milling of the three samples showed an increase from 90 to 94%. The conductivity of the samples with the same relative density 90% was compared. The main effect of the substitution is a strong increase in the electrical conductivity, by about 10 4 , and a significant decrease in the activation energy. Further studies involving simulations will be carried out to correlate these observations with the structural features of the substituted phases. The obtained results may be significant for overall sodium-ion battery performance. Keywords Na 2 Co(P 2−x As x)O 7 solid solutions • X-ray diffraction • Ball milling • Structure • Ionic conductivity * Hammouda Chebbi,

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“…This model was used with success to determine the pathways migration of Li + in Li 4 GeS 4 and Li 0.16 La 0.62 TiO 3 [24], Na + in NaCo 2 As 3 O 10 [10], K + in KCoP 3 O 9 [11], etc.…”

Section: Alkali Pathways Transport Simulationmentioning

confidence: 99%

“…The structural model was confirmed by the means of bond valence sum (BVS) [6][7] and charge distribution (CHARDI) [8][9] methods. To revise the correlation between the structure and the alkali migration in the anionic framework, the electrical properties were determined using complex impedance spectroscopy and the alkali migration pathways were simulated using the BVS model [10][11]. The new compound was characterized by the FTIR and Semiqualitative energy-dispersive X-ray spectroscopy (EDX) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, crystal structure and electrical properties of a new iron arsenate Na 2.77 K 1.52 Fe 2.57 (AsO 4 ) 4

Ouerfelli

Smida

Zid

2015

Journal of Alloys and Compounds

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Synthesis, crystal structure and electrical proprieties of new phosphate KCoP3O9

Cited by 15 publications

References 36 publications

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

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

The electrical behaviors of the melilite-like solid solutions Na2Co(P2−xAsx)O7 (x = 0.5; 1): effect of the P/As substitution on structure and electrical properties

Synthesis, crystal structure and electrical properties of a new iron arsenate Na 2.77 K 1.52 Fe 2.57 (AsO 4 ) 4

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Synthesis, crystal structure and electrical proprieties of new phosphate KCoP3O9

Cited by 15 publications

References 36 publications

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

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

The electrical behaviors of the melilite-like solid solutions Na2Co(P2−xAsx)O7 (x = 0.5; 1): effect of the P/As substitution on structure and electrical properties

Synthesis, crystal structure and electrical properties of a new iron arsenate Na 2.77 K 1.52 Fe 2.57 (AsO 4 ) 4

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

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