Synthesis and coloring performance of Ni-geikielite (Ni,Mg)TiO3 yellow pigments: Effect of temperature, Ni-doping and synthesis method

Llusar, M.; García, Enrique; Garcı́a, Marı́a Teresa; Esteve, Vicente; Gargori, C.; Monrós, G.

doi:10.1016/j.jeurceramsoc.2015.05.025

Cited by 27 publications

(5 citation statements)

References 68 publications

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“…1.4 eV), and (3) 3 A 2g ( 3 F)→ 3 T 1g ( 3 P) (ca. 2.7 eV) , . The observed absorption spectrum of Ni 3 TeO 6 compares well with the allowed transitions for octahedral coordination.…”

Section: Resultssupporting

confidence: 58%

“…1.4 eV), and (3) 3 A 2g ( 3 F)→ 3 T 1g ( 3 P) (ca. 2.7 eV) , . The 3 A 2g ( 3 F)→ 3 T 2g ( 3 F) transition falls in the IR region, and the 3 A 2g ( 3 F)→ 3 T 1g ( 3 F) and 3 A 2g ( 3 F)→ 3 T 1g ( 3 P) transitions fall in the visible region.…”

Section: Resultsmentioning

confidence: 89%

“…The observed absorption spectra of the Ni 2+ ‐substituted Mg 3 TeO 6 can be understood on the basis of the allowed transitions in octahedral coordination. The shoulders in the absorption spectra at 2.8, 2.45–2.3, and 1.65 eV were assigned to the spin‐forbidden transitions from 3 A 2g ( 3 F) to 1 A 1g ( 1 G), 1 T 2g ( 1 D), and 1 E g ( 1 D) respectively, which are known for Ni 2+ ions in octahedral symmetry , …”

Section: Resultsmentioning

confidence: 97%

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Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

2018

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We describe the syntheses, crystal structures, and optical absorption studies of the transition-metal-substituted corundum-related oxides (MM′) 3 TeO 6 (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu). The oxides are readily synthesized by the solid-state reactions of stoichiometric mixtures of the constituent binaries at 750-860°C. The Rietveld refinements of the crystal structures from the powder X-ray diffraction (XRD) data show that the Mg/Mn/Ni/Co/ZnO 6 octahedra are distorted. We have interpreted the unique colors and the optical absorption spectra of these materials in terms of the distorted coordi- [a]

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“…1.4 eV), and (3) 3 A 2g ( 3 F)→ 3 T 1g ( 3 P) (ca. 2.7 eV) , . The observed absorption spectrum of Ni 3 TeO 6 compares well with the allowed transitions for octahedral coordination.…”

Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

2018

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“…The color of (1 − x)NiTiO 3 -xMnFe 2 O 4 composites changed from the light yellow color of pure NiTiO 3 to the black color of NiTiO 3 -MnFe 2 O 4 composites. The absorption spectrum of NiTiO 3 showed two main absorption regions: 300 nm -550 nm (the transition 3 A 2g (3F) → 3 T 1g (3P)) and 650 nm -900 nm (the transition 3 A 2g (3F) → 3 T 1g (3F)) [25,26]. The op- [29,30].…”

Section: Optical Propertiesmentioning

confidence: 99%

NiTiO₃/MnFe₂O₄ ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Thom

Tuấn

Ngọc

et al. 2022

Materials Science-Poland

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This work reported the successful synthesis of ilmenite-spinel (1 − x)NiTiO3-xMnFe2O4 (x = 0, 0.05 and 0.10) composites by a simple sol-gel method. Phase formation of composites was analyzed by the X-ray diffraction method. All the synthesized samples formed diphasic ilmenite-ferrite composites without any trace of impurity or intermediate phase. The optical properties of synthesized composites were characterized by diffuse reflectance UV–visible spectroscopy. MnFe2O4 phase modified the optical band gap of NiTiO3 material and shifted its optical bandgap value toward lower energy. Ferroelectric and magnetic hysteresis loops were investigated at room temperature. The hysteresis loops indicated the typical ferromagnetic and ferroelectric nature of all composites at room temperature. In P-E loops, the remanent polarization (Pr ) and saturation polarization (Ps ) showed a slight increase in the sample with 5% MnFe2O4 phase addition. However, the lossy P-E loop was observed in the sample with the addition of 10% MnFe2O4. The presence of ferrite MnFe2O4 phase in NiTiO3 material enhanced the magnetic properties of NiTiO3 at room temperature. The M-H loops of NiTiO3-MnFe2O4 composites presented a ferromagnetic behavior with a dramatic increase in saturation magnetization with an increase of ferrite phase addition.

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“…29 For x = 0, the absorption spectral feature is in accordance with the yellow color associated with Ni 2+ ions (3d 8 ion) in octahedral C1 sites of NiTiO 3 Ilmenite. 30,31 Three wide bands corresponding to the spin-allowed (ΔS = 0) transitions from the 3 A 2g ( 3 F) ground state are observed: a sharp band in the blue region around 450 nm (ν 3 : 3 A 2g ( 3 F) → 3 T 1g ( 3 P)), a broader band in the red region centered at around 750−900 nm (ν 2 : 3 A 2g ( 3 F) → 3 T 1g ( 3 F)), and a last broad band in the near-IR centered between 1100 and 1400 nm (ν 1 : 3 A 2g ( 3 F) → 3 T 2g ( 3 F)). In addition, the absorption shoulders observed around 500 and 740 nm may be assigned to spinforbidden transitions to 3 A 1g ( 1 G) + 1 T 2g ( 1 D) and 1 E g ( 1 G) terms.…”

Section: Structural Analysis Of Micrometer-sized Ni 1−x Cumentioning

confidence: 99%

Copper-Substituted NiTiO₃ Ilmenite-Type Materials for Oxygen Evolution Reaction

Guiet

Huan

Payen

et al. 2019

ACS Appl. Mater. Interfaces

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Single Ni 1−x Cu x TiO 3 (0.05 ≤ x ≤ 0.2) Ilmenite-type phases were successfully prepared through a solid-state reaction route using divalent metal nitrates as precursors and characterized. Their electrocatalytic performance for oxygen evolution reaction (OER) in alkaline media is presented. The Cu content was determined (0.05 ≤ x ≤ 0.2) by X-ray diffraction. A thorough powder neutron diffraction study was carried out to identify the subtle changes caused by copper substitution in the structure of NiTiO 3 . The evolution of the optical and magnetic properties with the Cu content was also investigated on the raw micrometer-sized particles. A reduction in particle size down to ≈15 nm was achieved by ball-milling the raw powder prepared by the solid-state reaction. The best catalytic activity for OER was obtained for nanometer-sized particles of Ni 0.8 Cu 0.2 TiO 3 drop-casted on the Cu plate. For this electrode, a current density of 10 mA cm −2 for oxygen production was generated at 345 and 470 mV applied overpotentials with 1 and 0.1 M NaOH solutions as electrolytes, respectively. The catalyst retained this OER activity at 10 mA cm −2 for long-term electrolysis with a faradic efficiency of 90% for O 2 production in a 0.1 M NaOH electrolyte.

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Synthesis and coloring performance of Ni-geikielite (Ni,Mg)TiO3 yellow pigments: Effect of temperature, Ni-doping and synthesis method

Cited by 27 publications

References 68 publications

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

NiTiO₃/MnFe₂O₄ ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Copper-Substituted NiTiO₃ Ilmenite-Type Materials for Oxygen Evolution Reaction

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Synthesis and coloring performance of Ni-geikielite (Ni,Mg)TiO3 yellow pigments: Effect of temperature, Ni-doping and synthesis method

Cited by 27 publications

References 68 publications

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)3TeO6 (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)3TeO6 (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

NiTiO3/MnFe2O4 ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Copper-Substituted NiTiO3 Ilmenite-Type Materials for Oxygen Evolution Reaction

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Product

Resources

About

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

Exploring the Corundum Structure as a Host for Colored Compounds – Synthesis, Structures, and Optical Studies of (MM′)₃TeO₆ (M = Mg, Mn, Co, Ni, Zn; M′ = Mg, Mn, Co, Ni, Cu)

NiTiO₃/MnFe₂O₄ ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Copper-Substituted NiTiO₃ Ilmenite-Type Materials for Oxygen Evolution Reaction