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Synthesis of Fe3O4 nanoparticles with tunable sizes for the removal of Cr(VI) from aqueous solution / Yibing Feng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
[article]
Titre : Synthesis of Fe3O4 nanoparticles with tunable sizes for the removal of Cr(VI) from aqueous solution Type de document : texte imprimé Auteurs : Yibing Feng, Auteur ; Yi Du, Auteur ; Zhongtao Chen ; Minxing Du ; Kai Yang ; Xingjie Lv ; Zhongfu Li Année de publication : 2018 Article en page(s) : p. 1145-1155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants
Adsorption
Caractérisation
Chrome hexavalent
Déchets industriels -- Elimination
Nanoparticules
Nanoparticules -- Synthèse
Oxyde de fer
Solutions aqueuses (chimie)
TriéthanolamineIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, size-tunable magnetite (Fe3O4) nanocrystal spheres were promptly synthesized by a facile one-pot solvothermal process with the presence of triethanolamine as an additive. The as-synthesized Fe3O4 nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy, and vibrating sample magnetometer. The results showed that the synthesized nanoparticles were in the size range of 30–350 nm, had well-defined Fe3O4 crystal phase, and had favorable saturation magnetization. The effects of various important parameters, such as initial Cr(VI) concentration, temperature, and pH, on the adsorption properties of the as-obtained Fe3O4 particles for the removal of Cr(VI) in aqueous solution were deeply analyzed and studied. The results confirmed that the adsorption efficiency was highly pH dependent, decreased with the increasing of initial concentration of Cr(VI), and increased with increasing temperature. The adsorption data were well fitted with the Langmuir isotherm. The maximum adsorption capacity calculated from the Langmuir isotherm was 56.625 mg g−1 at temperature of 35°C and pH of 2.0. Note de contenu : - EXPERIMENTAL SECTION : Chemicals - Synthesis and characterization of the adsorbent - Adsorption experiments
- RESULTS AND DISCUSSION : Adsorbent characterization - Effect of temperature and contact time - Effect of pH on removal of Cr(VI) ions from aqueous solution and the distribution of Cr(VI) and Cr(III) species in residue solutions - Effect of initial concentration of Cr(VI) and the adsorption isotherms - Adsorption mechanismDOI : 10.1007/s11998-018-0052-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0052-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31141
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 1145-1155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20232 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment / Moslem Mashayekhi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
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Titre : Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment Type de document : texte imprimé Auteurs : Moslem Mashayekhi, Auteur ; Kamal Ghani, Auteur ; Reza Shoja Razavi, Auteur ; Narges Kiomarsipour, Auteur Année de publication : 2015 Article en page(s) : p. 1065-1071 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Lumière -- Absorption
Magnétite
Matériaux poreux
Oxyde de fer
Pigments -- Synthèse
Pigments inorganiques
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, firstly, porous magnetite Fe3O4 was synthesized using mesoporous silica molecular sieve (SBA-15) as a template. Finally, the infiltrated ferrous precursor into silica mesopores was subjected to an infiltration process, in order to obtain the porous Fe3O4. The structural, morphological, and porosity characteristics and optical property of as-synthesized material were investigated by X-ray diffraction, field emission scanning electron microscopy, N2 adsorption, and diffuse reflectance spectroscopy. Evaluation of the obtained results indicated that the porous Fe3O4 has well-defined morphology and higher light absorption in the UV/Vis region than not only the common Fe3O4 and the other inorganic black pigments, but also common carbon black. Investigation of the prepared coating with this pigment indicated the higher absorption (0.98) and lower reflectance (~2%) than commercial black thermal control coatings (TCC) with inorganic pigments. This pigment presents the best selection for black TCC with inorganic pigment and stable in the space environment. The as-prepared porous magnetite Fe3O4 also has high surface area (~24.78 m2/g) and excellent magnetic properties (M s = 70 emu/g) at room temperature. Note de contenu : - Reagent and materials
- Preparation of SBA-15 template
- Preparation of porous Fe3O4
- Paint preparation
- Materials characterizationDOI : 10.1007/s11998-015-9700-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9700-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24958
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1065-1071[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17585 - Périodique Bibliothèque principale Documentaires Disponible Tailor-made pigments / Hendrik Kathrein in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4517 (10/2007)
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Titre : Tailor-made pigments Type de document : texte imprimé Auteurs : Hendrik Kathrein, Auteur Année de publication : 2007 Article en page(s) : p. 30-31 Langues : Anglais (eng) Catégories : Encre d'imprimerie
Magnétite
Oxyde de fer
Pigments inorganiques
Pigments inorganiques -- AnalyseIndex. décimale : 667.2 Colorants et pigments Résumé : This paper explains on the production of magnetite pigments for printer and copier toners. It emphasised that demands on synthetic iron oxides are becoming increasingly more stringent.
Printer toner is more than just magnetic iron oxide. In most copiers and laser printers, magnetite pigments are used to blacken the appropriate parts of the page. Each magnetic one-component toner contains 30 to 60% of the specialty iron oxides. But modern devices have strict requirements for the particles. Each particle should be identical to all the others to ensure an optimal printed image. The particles have to exhibit the proper magnetic and electrical properties and these must not be affected by humidity. Finally, the colour has to be right : deep back with an elegant blue undertone ispreferred today. TO satisfy all these requirements, the iron oxide must crystallise under precisely controlled conditions.Note de contenu : - Typical analytical data of surface treated Bayoxide E high-performance grades En ligne : https://drive.google.com/file/d/14Fd7w0dA_OReg6xRXcyc-wOmWKEDL0PO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27290
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 197, N° 4517 (10/2007) . - p. 30-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008333 - Périodique Bibliothèque principale Documentaires Disponible The best for red and yellow / Frank Kleinsteinberg in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4618 (03/2016)
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Titre : The best for red and yellow Type de document : texte imprimé Auteurs : Frank Kleinsteinberg, Auteur ; Markus Vogel, Auteur Année de publication : 2016 Article en page(s) : p. 34-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions
Oxyde de fer
Pigments métalliques
Potentiel zeta
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : New additive performs on a very high level with a broad range of iron oxide grades independent from their morphology and structure. It combines outstanding viscosity reduction and very good long-term stability of iron oxide concentrates with excellent hiding power. The new additive provides an optimised balance between electrostatic and steric stabilisation making it a very efficient additive. This additive helps to reduce complexity and finally it contributes to a more cost efficient way to formulate decorative coatings. Note de contenu : - Pigment concentrate technology
- Pigment dispersion process
- Electrostatic stabilisation zeta potential
- Steric stabilisation
- Particle size and hiding power
- Viscosity and stability
- Zeta potentialEn ligne : https://drive.google.com/file/d/1uBYmMWt-C1o8wXHcoEvmwkNgZG0pKvBH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25804
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4618 (03/2016) . - p. 34-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18015 - Périodique Bibliothèque principale Documentaires Disponible The best for red and yellow / Frank Kleinsteinberg in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4663 (08/2020)
[article]
Titre : The best for red and yellow Type de document : texte imprimé Auteurs : Frank Kleinsteinberg, Auteur ; Markus Vogel, Auteur Année de publication : 2020 Article en page(s) : p. 15-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs
Agents dispersants (chimie)
Agents mouillants
Caractérisation
Jaune
Oxyde de fer
Pigments inorganiques
Potentiel zeta
Rhéologie
Rouge (couleur)
Stabilité au stockage
Taille des particulesIndex. décimale : 667.2 Colorants et pigments Résumé : The author discusses a new additive technology for waterborne iron oxide pigment concentrates.
In decorative coatings, the use of pigment concentrates is a modem and flexible wayto produce coloured paints. Especially in waterborne applications, these concentrates have to be suitable for a broad range of different binder technologies. Because of that, the concentrate formulations are usually free of binders and feature a broad compatibility. Furthermore, the demands in terms of storage stability, colour strength and cost efficiency are very high. These demands are addressed directly to the used additive technology. The additive has to induce outstanding viscosity reduction to achieve the highest pigment loads and the most economic grinding. It has to stabilise the pigments over a long period of time without any change in viscosity and it has to develop maximum colour strength to avoid any waste of expensive pigments.
The most important pigment class in decorative coatings are the iron oxides. Iron oxides are not difficult to wet because of their shape. Iron oxide yellow tends to give dilatant rheology, which can be a disaster when it comes to automatically dosing in a dispensing machine. Iron oxide red, on the other hand, tends to increase the viscosity of pigment concentrates over time.
This paper elucidates to different structures of wetting and dispersing additives, which could be used in waterborne, binder-free pigment concentrates for iron oxides and their performance. It is focused on the stability and the wetting of the pigments, which are reflected by the viscosity reduction, the storage stability of the pigment concentrates and the colouristic properties. For the characterisation of the wetting behaviour and the dispersing efficiency, the zeta potential has been used. In the end, advice and guidelines for formulating iron oxide pigment concentrates will be given.Note de contenu : - Pigment concentrate technology
- Pigment dispersion process
- Electrostatic stabilisation - Zeta potential
- Steric stabilisation
- Discussion of the results
- Particle size andhiding power
- Viscosity and stability
- Zeta potentialEn ligne : https://drive.google.com/file/d/1y0_JPiIZxLA8SxrNLDp3PBsmcTfHJWJH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34450
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4663 (08/2020) . - p. 15-16[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21904 - Périodique Bibliothèque principale Documentaires Disponible The best for red and yellow- A new additive technology for waterborne iron oxide pigment concentrates / Frank Kleinsteinberg in PAINTINDIA, Vol. LXX, N° 9 (09/2020)
PermalinkThe development of a multi-axis magnetic roller for micro-structure transfer embossing processing technology / Y.-J. Weng in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 5 (11/2015)
PermalinkThe road to new golden dimensions / Raimund Schmid in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2019)
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