FTIR and dielectric studies of nickel doped potassium hexa-titanate (K2Ti6O13) fine ceramics

Siddiqui, Mohd Asim; Chandel, Vishal Singh; Shariq, Mohammad; Azam, Ameer

doi:10.1007/s10854-013-1466-x

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…Where symbols have their usual meanings and already been explained in our previous papers 14,[22][23][24] . It has been found that a ≠ b ≠ c, and also α = γ = 90 o ≠ β, as the case should be for monoclinic structure, here the value of β is decreasing on increasing the doping percentage of nickel.…”

Section: Results and Discussion X-ray Diffractionmentioning

confidence: 99%

“…After that the mixture was cooled in the furnace itself up to room temperature. The cooled material was again ground for 30 min 12,[22][23] . It was then ready for characterization.…”

Section: Methodsmentioning

confidence: 99%

“…Kikkawa et al, reported hydrolysis and thermolysis of the alkali titanates, Fujishiro et al, investigated cation exchange property of alkali titanates as these materials are capable in protecting the environment from radioactive wastes, the alkali titanates can also be used as capacitors, electrolyte for fuel cell, biosensors as well as dielectric sensors [9][10][11][12] [15][16][17][18][19] . Alkali titanates with tunnel and layered structure have been synthesized by various research groups including our group [20][21][22][23][24][25][26][27][28][29][30][31][32][33] .…”

Section: Introductionmentioning

confidence: 99%

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Differential Scanning Calorimetric Analysis of Ni Doped Sodium Hexa-titanate

Alam¹,

Chandel²,

Khatoon³

2020

Orient. J. Chem

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Pure and nickel doped alkali titanates Na 2 Ti 6-x Ni x O 13 (where x = 0, 0.04, 0.08, 0.12 mol percentage) were synthesized using conventional solid-state reaction method. Phase of the synthesized samples have been confirmed with the help of X-ray diffraction (XRD) patterns recorded at room temperature (RT). Peak positions of all samples (Na 2 Ti 6-x Ni x O 13 ) exhibited the monoclinic structure. FE-SEM of these samples has been done at 10kV acceleration voltage, in secondary electron mode, at different magnifications to observe morphology (microstructure) and they have been found as rod shaped. Thermal stability of pure and nickel doped titanates was done with the help of differential scanning calorimetry (DSC) in presence of inert gas (nitrogen) from ambient temperature to 800°C, keeping heating and cooling rates 10°C/minute.

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Section: Results and Discussion X-ray Diffractionmentioning

confidence: 99%

“…After that the mixture was cooled in the furnace itself up to room temperature. The cooled material was again ground for 30 min 12,[22][23] . It was then ready for characterization.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Differential Scanning Calorimetric Analysis of Ni Doped Sodium Hexa-titanate

Alam¹,

Chandel²,

Khatoon³

2020

Orient. J. Chem

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“…To reveal the functional group analysis, FTIR is an important technique [59,60]. Samples of SnO 2 , 7% Co-SnO 2 , and 7% Co-SnO 2 /50% SGCN were examined using an FTIR spectrometer in the range of 4000-400 cm −1 .…”

Section: Ftir Analysismentioning

confidence: 99%

Fabrication of Effective Co-SnO2/SGCN Photocatalysts for the Removal of Organic Pollutants and Pathogen Inactivation

et al. 2023

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Substantial improvement is needed in efficient and affordable decolorization and disinfection methods to solve the issues caused by dyes and harmful bacteria in water and wastewater. This work involves the photocatalytic degradation of methylene blue (MB) as well as gram-negative and gram-positive bacteria by cobalt-doped tin oxide (Co-SnO2) nanoparticles (NPs) and Co-SnO2/SGCN (sulfur-doped graphitic carbon nitride) nanocomposites (NCs) under sunlight. The coprecipitation approach was used to synthesize the photocatalysts. Maximum methylene blue (MB) photocatalytic degradation was seen with the 7% Co-SnO2 NPs compared to other (1, 3, 5, and 9 wt.%) Co-SnO2 NPs. The 7% Co-SnO2 NPs were then homogenized with different amounts (10, 30, 50, and 70 weight %) of sulfur-doped graphitic carbon nitride (SGCN) to develop Co-SnO2/SGCN heterostructures with the most significant degree of MB degradation. The synthesized samples were identified by modern characterization methods such as FT-IR, SEM, EDX, UV-visible, and XRD spectroscopies. The Co-SnO2/50% SGCN composites showed a significant increase in MB degradation and degraded 96% of MB after 150 min of sunlight irradiation. Both gram-negative (E. coli) and gram-positive (B. subtiles) bacterial strains were subjected to antibacterial activity. All samples were shown to have vigorous antibacterial activity against gram-positive and gram-negative bacteria, but the Co-SnO2/50% SGCNcomposites exhibited the maximum bactericidal action. Thus, the proposed NC is an efficient organic/inorganic photocatalyst that is recyclable and stable without lowering efficiency. Hence, Co-SnO2/50% SGCNNC has the potential to be employed in water treatment as a dual-functional material that simultaneously removes organic pollutants and eradicates bacteria.

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“…In K 2 Ti 6 O 13 crystal, potassium ions are located in the tunnel space formed by a 3D arrangement of TiO 6 octahedra [23]. K 2 Ti 6 O 13 has various applications [24,25], especially as a photocatalyst [26][27][28][29]. However, K 2 Ti 6 O 13 has a wide band gap of 3.45 eV and shows photocatalytic activity only under UV-light irradiation [30].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and optical properties of K2Ti6O13 doped with transition metal Fe or Ag

Chen

et al. 2018

Chinese Journal of Chemical Physics

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Based on the experimental study of the optical properties of K 2 Ti 6 O 13 doped with Fe or Ag, their electronic structures and optical properties are studied by the first-principles method based on the density functional theory (DFT). The calculated optical properties are consistent with the experiment results. K 2 Ti 6 O 13 doped with substitutional Fe or Ag has isolated impurity bands mainly stemming from the hybridization by the Fe 3d states or Ag 4d states with Ti 3d states and O 2p states and the band gap becomes narrower, the absorption edge of K 2 Ti 6 O 13 thus has a clear red shift and the absorption of visible light can be realized after doping. For Fe-doped K 2 Ti 6 O 13 , the impurity bands are in the middle of the band gap, suggesting that they can be used as a bridge for valence band electrons transition to the conduction band. For Ag-doped K 2 Ti 6 O 13 , the impurity bands form a shallow acceptor above the valence band and can reduce the recombination rate of photoexcited carriers. The experimental and calculated results are significant for the development of K 2 Ti 6 O 13 materials that have absorption under visible light.

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FTIR and dielectric studies of nickel doped potassium hexa-titanate (K2Ti6O13) fine ceramics

Cited by 12 publications

References 42 publications

Differential Scanning Calorimetric Analysis of Ni Doped Sodium Hexa-titanate

Differential Scanning Calorimetric Analysis of Ni Doped Sodium Hexa-titanate

Fabrication of Effective Co-SnO2/SGCN Photocatalysts for the Removal of Organic Pollutants and Pathogen Inactivation

Electronic structure and optical properties of K2Ti6O13 doped with transition metal Fe or Ag

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