Synthesis, electrical and dye adsorption properties of KZnFe(PO4)2 zeolite type structure

Badri, Abdessalem; Jabli, Mahjoub; López, Marı́a Luisa; Amara, Mongi Ben

doi:10.1016/j.inoche.2019.107609

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…This behavior has also been observed in other organic compounds. [44][45][46][47] This behaviour conrms the result found by the complex impedance. The s(u) can be represented dynamically by the universal response (Jonscher power law) relation: 48…”

Section: Complex Impedance Spectroscopysupporting

confidence: 65%

A new cobalt(ii)meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

et al. 2020

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Section: Complex Impedance Spectroscopysupporting

confidence: 65%

A new cobalt(ii)meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

et al. 2020

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“…It is clear that the σac is independent of frequency in the low frequency region, which is generally known as hopping frequency, but shifts towards higher-frequency side with the increase of temperature. Such a behavior is also observed in other organic compounds [35,[40][41][42], and confirms the result found by the complexes impedance.…”

Section: Dielectric Analysissupporting

confidence: 90%

Dielectronic properties and photocatalytic activities of two novel cobalt(II) meso-tetraphenylporphyrin-based coordination complexes

Amiri

Guergueb

Bourguiba

et al. 2023

Preprint

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Two novel cobalt(II) tetraphenylporphyrin-based six-coordinate complexes; bis(4-Dimethylaminopyridine)(5,10,15,20-tetrakis[4-bromophenyl]porphinato) cobalt(II) (1) and bis(4-Dimethylaminopyridine) (5,10,15,20-tetrakis[4-chlorophenyl]porphinato )cobalt(II) (2) were synthesised in good qualitative and quantitative yields. The chemical structures of these synthesized compounds were confirmed by elemental analysis, infrared, proton nuclear magnetic resonance and mass spectrometry, UV–vis absorption, and fluorescence spectroscopies. Their photophysical properties, namely their molar extinction coefficients (ε), fluorescence quantum yields (Φf) and lifetimes (τf), were determined and compared with those of meso-tetraphenylporphyrin. The dielectric properties such as dielectric constant (ε′), dielectric loss (ε″), and conductivity (σ) were investigated as a function of temperature and frequency. Impedance analysis was carried out using Cole-Cole plots to understand the electrical conduction mechanism. As an application of our two cobaltous complexes, an investigation involving complexes 1–2 in the photocatalytic performance was carried out by decomposing the TB dye under visible light irradiation at room temperature.

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“…The values of the activation energy, calculated using σ dc in eq 3, attributed to the long-range movement of free K + ions, vary between 490 meV for pure Cr1Fe0 and 181 meV for Cr0.25Fe0.75, suggesting that those materials are among the materials with good ionic conductivity compared to other Kbased materials, especially compared to pure FePO 4 with an activation energy of 650 meV. 96 Compared to other 3Dstructured phosphates, such as KCuFe(PO 4 ) 2 , KNi 4 (PO 4 ) 3 , or KZnFe(PO 4 ) 2 , which present slightly higher values of 1120, 1150, and 1090 meV, respectively, 54,97,98 the proposed materials have good activation energy values. K 2 VP 2 O 8 lamellar phosphates, with an activation energy of 640 meV, are in the same range as the proposed materials.…”

Section: Electric Conduction Mechanismmentioning

confidence: 99%

Structural and Electrical Properties of Novel Cr/Fe Mixed Transition-Metal Phosphates

et al. 2023

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The phosphate KCoCr(PO4)2 and iron-substituted variants KCoCr1–x Fe x (PO4)2 (x = 0.25, 0.5, and 0.75) were synthesized by a solid-state reaction route, while a high substitution level of Fe was achieved. Their structures were refined using powder X-ray diffraction and indexed in a monoclinic system with a P21/n space group. A 3D framework with six-sided tunnels parallel to the [101] direction was formed in which the K atoms are located. Mössbauer spectroscopy confirms the exclusive presence of octahedral paramagnetic Fe3+ ions, with isomer shifts increasing slightly with x substitution. Electron paramagnetic resonance spectroscopy confirmed the presence of paramagnetic Cr3+ ions. The activation energy, determined by dielectric measurements, shows that the iron-containing samples present higher ionic activity. Relative to the electrochemical activity of K, these materials could be good candidates for positive and/or negative electrode materials for energy storage applications.

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Synthesis, electrical and dye adsorption properties of KZnFe(PO4)2 zeolite type structure

Cited by 12 publications

References 38 publications

A new cobalt(ii)meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

A new cobalt(ii)meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

Dielectronic properties and photocatalytic activities of two novel cobalt(II) meso-tetraphenylporphyrin-based coordination complexes

Structural and Electrical Properties of Novel Cr/Fe Mixed Transition-Metal Phosphates

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