Improvement of acid and base resistance of nickel phosphate pigment by the addition of lanthanum cation

Onoda, Hiroaki; Matsui, Hironori; Tanaka, Isao

doi:10.1016/j.mseb.2007.05.009

Cited by 37 publications

(23 citation statements)

References 10 publications

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“…3). In this voltammogram, two quasi-reversible reduction couples at -0.458 and -0.690 V are assigned to the reduction of acacen ligand, by analogy to other acacen complexes 24 . In comparison with free acacen, the reduction couples shift to more positive potentials due to the coordination of acacen ligand to the La(III) center.…”

Section: Electrochemical Studiesmentioning

confidence: 94%

Synthesis and Characterization of Lanthanum Oxide and Lanthanumoxid Carbonate Nanoparticles from Thermalizes of [La(acacen)(NO3)(H2O) Complex

Saravani¹,

Khajehali²

2016

Orient. J. Chem

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In this investigation, we report facile synthesis of transition metal oxides (La 2 C 2 O 5 and La 2 O 3 ) as nanoparticles. The process contained two steps: first preparation of complex [La(acacen) (NO 3 )(H 2 O)](1) where acacen= acetylacetonatoethylenediamine. Then the precursors were calcination. In first step, complex (1) synthesized using a methanolic solution of La (NO 3 ) 3 and acetylacetonatoethylenediamine. Then desired product was collected by suction filtration and characterized using Fourier transform infrared (FT-IR), Ultra Violet-Visible (UV-vis) spectroscopy and cyclic voltammetry (CV) method for electrochemical studies. The next step to prepare nanoparticles, amount of compound (1) put in silica gel and oleic acid solution for 4-hours. Then compound (1) was placed in a furnace with a temperature of 600, 700, 800 and 900°C. After calcination of title compound, this sample studied using XRD (X-ray Diffraction)and SEM (Scanning Electron Microscopy)techniques. Particle size for several diffraction and average crystallite size were measured from the XRD data based on Debye-Scherrer equation. The X-ray diffraction patterns at room temperature revealed that, highly pure and crystallized Lanthanum oxide nanoparticles as La 2 C 2 O 5 and La 2 O 3 formula with orthorhombic phases in 600°C and 900°C respectively, with an average particle size of about less than 100nm for both nano-oxide. SEM figure show that the particles have same morphology with a uniform porous surface.

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Section: Electrochemical Studiesmentioning

confidence: 94%

Synthesis and Characterization of Lanthanum Oxide and Lanthanumoxid Carbonate Nanoparticles from Thermalizes of [La(acacen)(NO3)(H2O) Complex

Saravani¹,

Khajehali²

2016

Orient. J. Chem

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“…The actual cerium ratio in the precipitates was lower than the nominal value of the precursor. In previous studies [14,15], the lanthanum ratio in the precipitates was higher than the nominal value. This difference is considered to be related to the valence state of the rare-earth cations.…”

Section: Chemical Composition and Powder Properties Of Iron-cerium mentioning

confidence: 72%

Synthesis and catalytic properties of iron-cerium phosphate prepared in ethylene glycol using additives

Onoda

Sakumura

2013

J Adv Ceram

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Abstract:The effects of cerium substitution, use of additives, and heating temperature on the chemical composition and catalytic activity of iron phosphate were evaluated. Iron-cerium phosphate was prepared from iron nitrate, ammonium cerium nitrate, and sodium phosphate in ethylene glycol using sodium dodecyl-sulfate or acetylacetone as additive. The chemical composition, particle shape and size distribution of the obtained samples were respectively evaluated based on ICP and XRD, SEM, and laser diffraction/scattering analysis. The catalytic activity was evaluated based on the decomposition of the complex formed from formaldehyde, ammonium acetate, and acetylacetone. XRD peaks corresponding to FePO 4 were observed for the samples heated at 600 ℃ whereas samples treated at lower temperatures were amorphous. Iron-cerium phosphates heated at 200 ℃ and 400 ℃ exhibited high catalytic activity for the decomposition of the aforementioned complex.

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“…Phosphates have been used for ceramic materials, catalysts, adsorbents, fluorescent materials, dielectric substances and biomaterials, for metal surface treatment, as fertilizer, detergents and food additives, in fuel cells and pigments, and in other applications [4][5][6][7][8]. Phosphate materials are well known to have high affinity for living organisms.…”

Section: Introductionmentioning

confidence: 99%

pH-controlled hydrothermal synthesis of titanium phosphates and their powder properties

Onoda

Yamaguchi

2014

J Adv Ceram

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Titanium phosphates were prepared from titanium chloride and sodium pyrophosphate at various pH in hydrothermal process as a novel white pigment for cosmetics. Their chemical composition, powder properties, photo catalytic activity, colour phase and smoothness were studied. The obtained materials had a higher Ti/P ratio than that used in preparation conditions because of the formation of titanium oxide and hydroxide. The samples prepared at pH = 4 had particles smaller than 100 µm. Titanium phosphates had less photo catalytic activity to protect the sebum on the skin. The obtained materials in hydrothermal process and their thermal products at 100 ℃ showed high reflectance in the range of visible light.

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Improvement of acid and base resistance of nickel phosphate pigment by the addition of lanthanum cation

Cited by 37 publications

References 10 publications

Synthesis and Characterization of Lanthanum Oxide and Lanthanumoxid Carbonate Nanoparticles from Thermalizes of [La(acacen)(NO3)(H2O) Complex

Synthesis and Characterization of Lanthanum Oxide and Lanthanumoxid Carbonate Nanoparticles from Thermalizes of [La(acacen)(NO3)(H2O) Complex

Synthesis and catalytic properties of iron-cerium phosphate prepared in ethylene glycol using additives

pH-controlled hydrothermal synthesis of titanium phosphates and their powder properties

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