Synthesis, properties and uses of chromium-based pigments from the Manufacture de Sèvres

Verger, Louisiane; Dargaud, Olivier; Chassé, Mathieu; Trcera, Nicolas; Rousse, Gwenaëlle; Cormier, Laurent

doi:10.1016/j.culher.2017.09.012

Cited by 24 publications

(21 citation statements)

References 39 publications

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“…e dose of the adsorbent is an important factor that should be considered for the effective removal of Cr(III) cations, since it determines the equilibrium in the system [4]. e results of the adsorption experiments are shown in Figures 6-8 for degree adsorption (%) and sorption capacity (mg/g).…”

Section: Sorption Experimentmentioning

confidence: 99%

“…Chromium oxides are the raw material for the preparation of polishing pastes and paints for glass and ceramics and are part of chromium-containing catalysts. Chromium salts are used in the production of anticorrosive pigments and electroplating [1][2][3][4]. All these technological processes lead to the formation of a large amount of concentrated wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

Frolovа¹,

Kharytonov

2019

Advances in Materials Science and Engineering

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Porous biochars obtained from coniferous woods, and magnetic biochars based on them, which showed high sorption properties when extracting Cr(III) from aqueous solutions (from 0.005 to 0.0125 mol/L), were studied. The adsorption properties of the magnetic biochar are compared with the initial biochar. It has been established that the preparation of materials by the method of pyrolysis and subsequent treatment in a plasma reactor makes it possible to bring the samples under study into a number of promising adsorbents for the extraction of chromium from aqueous solutions.

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Section: Sorption Experimentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

Frolovа¹,

Kharytonov

2019

Advances in Materials Science and Engineering

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“…The pioneering work aiming at the preparation of the uvarovite pigment powders was conducted in 1885 with the Victorian green pigment powder obtained by solid-state reaction at high temperature 1000–1370 °C using a powder mixture containing K 2 Cr 2 O 7 , CaCO 3 , and SiO 2 [ 9 ]. Various research works have been conducted since the 1950s.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Victoria Green (Ca3Cr2Si3O12) Nanoparticles in Alkaline Fluids and Its Colour Hue Characterisation

et al. 2021

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One-pot hydrothermal preparation of Ca3Cr2Si3O12 uvarovite nanoparticles under alkaline conditions was investigated for the first time. The experimental parameters selected for the study considered the concentration of the KOH solvent solution (0.01 to 5.0 M), the agitation of the autoclave (50 rpm), and the nominal content of Si4+ (2.2–3.0 mole). Fine uvarovite particles were synthesised at 200 °C after a 3 h interval in a highly concentrated 5.0 M KOH solution. The crystallisation of single-phase Ca3Cr2Si3O12 particles proceeded free of by-products via a one-pot process involving a single-step reaction. KOH solutions below 2.5 M and water hindered the crystallisation of the Ca3Cr2Si3O12 particles. The hydrothermal treatments carried out with stirring (50 rpm) and non-stirring triggered the crystallisation of irregular anhedral particles with average sizes of 8.05 and 12.25 nm, respectively. These particles spontaneously assembled into popcorn-shaped agglomerates with sizes varying from 66 to 156 nm. All the powders prepared by the present method exhibited CIE-L*a*b* values that correspond to the Victoria green colour spectral space and have a high near infrared reflectance property. The particle size and structural crystallinity are factors affecting the Victoria pigment optical properties, such as CIE-L*a*b* values, green tonality, and NIR reflectance.

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“…It attracts the attention because of its unique physical and chemical properties and technological possibilities. This spinel is used in some refractories' composition [1,2], semiconductors [3], magnetic and electrical materials [4], sensors [5], catalysts [6][7][8], photocatalysts [9], pigments [10], etc. Active work on nanoceramics and nanocomposites with MgCr 2 O 4 participation [8,9,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

MAGNESIOCHROMITE (MgCr2O4) SYNTHESIS: EFFECT OF MECHANICAL AND MICROWAVE PRETREATMENT

Kosenko

Filatova

Egorova

2020

IVKKT

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Magnesiochromite spinel synthesis based on oxides, hydroxides and nitrates of magnesium and chromium was investigated. The precursors reactivity was compared by means of effective rate constants calculated by Ginstling-Brounshtein equation. The possibility of use of this equation was confirmed by the dependences linearity with high linear approximation coefficients. The reactivity of MgO various forms (soft-burned, or caustic magnesite, and dead-burned, or periclase) in the spinel formation was compared. Oxide precursors (especially with the periclase participation) reacted with the substantially less rate in comparison with hydroxides and salts. The influence of a preliminary mechanical activation by impact-and-attrition (planetary mill) and attrition (ball-ring mill) action as well as a microwave treatment (2.45 GHz) was analyzed. The most positive effect of a mechanical treatment in a planetary mill that was associated with an activation of Mg and Cr compounds became apparent in the field of relatively low temperatures (700-1100 °С). For example, MgCr2O4 yield at 1000 °С and the joint impact treatment of oxides was twice as much than under the simple mixing. The subsequent temperature rising lead to some decrease of a pretreatment effect so long as diffusion coefficients in these conditions grew, so the reaction run rapidly even without a preliminary mechanical treatment. It was noticed that an appreciable reduction of MgO reactivity in the spinel formation after a certain attrition in a ball-ring mill linked to the plane sliding in cubic crystals and resulted in the removing of the most disordered and defective layer from grains and the plane surface uncovering. The combined method consisting of a mechanical treatment of magnesium and chromium nitrates mixture in a planetary mill and the subsequent burning in a thermal kiln (1000 °С) was considered as the most effective as it resulted in practically single product. The microwave treatment took up an intermediate position by the effectiveness.

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Synthesis, properties and uses of chromium-based pigments from the Manufacture de Sèvres

Cited by 24 publications

References 39 publications

Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

One-Pot Hydrothermal Synthesis of Victoria Green (Ca3Cr2Si3O12) Nanoparticles in Alkaline Fluids and Its Colour Hue Characterisation

MAGNESIOCHROMITE (MgCr2O4) SYNTHESIS: EFFECT OF MECHANICAL AND MICROWAVE PRETREATMENT

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