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Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation / Oleksandr Lozovskyi in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)
[article]
Titre : Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation Type de document : texte imprimé Auteurs : Oleksandr Lozovskyi, Auteur ; Gönül Gündüz, Auteur ; Meral Dükkanci, Auteur ; Roman prihod'ko, Auteur Année de publication : 2015 Article en page(s) : p. 245-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Catalyseurs métalliques
Colorants -- Détérioration
Colorants -- Oxydation
Dioxyde de titaneIndex. décimale : 667.2 Colorants et pigments Résumé : In this study, silver- or copper-doped TiO2–Ce-, TiO2–La-, and commercial TiO2 (P25)-supported catalysts were prepared. The catalysts and supports were characterised by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and nitrogen adsorption studies. UV-light-assisted heterogeneous Fenton-like oxidation of two different-structure dyes (anionic azo dye Orange II, CI Acid Orange 7 and cationic triphenylmethane dye Crystal Violet, CI Basic Violet 3) was investigated over the catalysts. Higher catalytic activity was observed in the oxidation of Orange II than in the oxidation of Crystal Violet. For both dyes, the TiO2–Ce and TiO2–La-supported catalysts, which were in the form of anatase only, gave higher photocatalytic activity than the P25-supported catalysts, which were in the form of anatase and rutile. Complete colour removal was observed during oxidation of Orange II over Cu/TiO2–Ce and Cu/TiO2–La catalysts, whereas the highest degree of decolorisation, 89.3%, was achieved by oxidation of Crystal Violet over Ag/TiO2–Ce. The pH of the solution affected the surface state of the TiO2, thus affecting the photocatalytic degradation of the dyes. The surface area of the catalysts is also a key parameter that influences their photocatalytic activity. It was observed that catalysts having higher surface areas brought about greater dye degradation. Note de contenu : - EXPERIMENTAL STUDY : Materials - Catalyst preparation - Catalyst characterisation
- EXPERIMENTAL PROCEDURE
- RESULTS AND DISCUSSION : Catalyst characterisation - UV-light-assisted heterogeneous Fenton-like degradation of dyesDOI : 10.1111/cote.12148 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12148 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24127
in COLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 245-254[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17231 - Périodique Bibliothèque principale Documentaires Disponible Preparation of polyurethane acrylate-based titanium dioxide pigment and its use in blue light-curable ink / Chenlong Wang in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)
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Titre : Preparation of polyurethane acrylate-based titanium dioxide pigment and its use in blue light-curable ink Type de document : texte imprimé Auteurs : Chenlong Wang, Auteur ; Kai Yan, Auteur ; Xun Luo, Auteur ; Shulan Jin, Auteur ; Lili Wang, Auteur ; Jun Luo, Auteur ; Jinhuan Zheng, Auteur Année de publication : 2021 Article en page(s) : p. 348-360 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère uréthane acrylate
Dioxyde de titane
Encre
Lumière bleue
Photoréticulation
Pigments -- Synthèse
Potentiel zeta
Rhéologie
Solidité de la couleur
Taille des particulesIndex. décimale : 667.2 Colorants et pigments Résumé : Polyurethane acrylate-based titanium dioxide was used to prepare blue light-curable inks as both a white pigment to replace the original white pigment and as an oligomer. The polyurethane acrylate-based titanium dioxide was fabricated using a two-step method. In the first step, the titanium dioxide was grafted with γ-aminopropyltriethoxy silane, and the grafting process was studied. Second, amino-modified titanium dioxide was used to prepare polyurethane acrylate-based titanium dioxide, which was then used to configure the blue light-curable polyurethane acrylate-based titanium dioxide ink. Fourier Transform–infrared spectroscopy indicated that the amino-modified titanium dioxide and polyurethane acrylate-based titanium dioxide were prepared successfully. The content of the amino groups on the surface of the amino-modified titanium dioxide could be effectively controlled by adjusting the pH value. Moreover, by increasing the content of the amino groups, the viscosity decreased and the photopolymerisation efficiency increased, which was attributed to the formation of branched structures and the promoting effect of the amino groups on the titanium dioxide. The inks with decreased viscosity and branched structures displayed excellent cross-linking properties: viscoelastic transition was achieved within 10 seconds and the final moduli were in the range of 36-55 kPa. The cross-linking degree and rate were more than seven times those of unmodified ink. The ranges of elongation and stress were 95%-165% and 1.9-4.3 MPa, respectively, and the amino group content varied from 0% to 0.101%. In general, polyurethane acrylate-based titanium dioxide was shown to be suitable for blue light-curable ink. Note de contenu : - EXPERIMENTAL : Materials - Preparation of amino-modified titanium dioxide - Preparation of polyurethane acrylate-based titanium dioxide - Preparation of the blue-light-curable polyurethane acrylate-based titanium dioxide ink - Preparation of the blue light-curable polyurethane acrylate-based titanium dioxide composite films - Characteristics of amino group content on the surface of titanium dioxide - FT-IR - Particle size and zeta potential - Rheological performance of the blue light-curable polyurethane acrylate-based titanium dioxide ink - Photo-rheological performance of the blue light-curable polyurethane acrylate-based titanium dioxide ink - Tensile properties of the blue light-curable polyurethane acrylate-based titanium dioxide composite films - Measurement of colour fastness to crocking
- RESULTS AND DISCUSSION : Preparation of amino-modified titanium dioxide - Properties of polyurethane acrylate-based titanium dioxide - Properties of blue light-curable polyurethane acrylate-based titanium dioxide ink and film
- Table 1 : Effect of APS concentration on the particle size of original and modified titanium dioxide
- Table 2 : Effect of reaction temperature on the particle size of original and modified titanium dioxide
- Table 3 : Effect of pH value on th eparticle size of original and modified titanium dioxideDOI : https://doi.org/10.1111/cote.12532 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12532 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36099
in COLORATION TECHNOLOGY > Vol. 137, N° 4 (12/07/2021) . - p. 348-360[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22848 - Périodique Bibliothèque principale Documentaires Disponible Preparation of some coloured chelates of 2-mercapto-4-picoline-N-oxide and their applications as new pigments / A. Mirhabibi in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B4 (12/2004)
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Titre : Preparation of some coloured chelates of 2-mercapto-4-picoline-N-oxide and their applications as new pigments Type de document : texte imprimé Auteurs : A. Mirhabibi, Auteur ; R. Aghababazadeh, Auteur ; Mohammad Edrissi, Auteur Année de publication : 2004 Article en page(s) : p. 285-287 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chélates
Ligands
Pigments -- Synthèse
Pigments organiquesIndex. décimale : 667.2 Colorants et pigments Résumé : The sulphur-containing ligand 2-mercapto-4-picoline-N-oxide (MPN) was prepared from 2-bromo-4-picoline by peracetic oxidation and the reaction of its oxidation product with thiourea, and finally hydrolysis with sodium hydroxide solution. The preliminary reaction of MPN with metal ions showed that from 25 common metal ions examined, only Fe(III) and Cu(II) gave 3:1 and 2:1 stable insoluble and intense coulored chelates which were violet and green respectively. Al(III), Y(III), Ce(IV), Th(IV), Pb(II), Mn(II), Mg(II), Sr(II), Ba(II) and Ca(II) gave no precipitate. Hg(II), Ga(III), Tl(II), Bi(III), W(IV), Zr(IV), Zn(II) and Ag(I) gave whites. Ti(IV), V(V), Co(II), Ni(II) and Pd(II) gave pale coloured chelates. The reaction of MPN with Fe(III) and Cu(II) ions were quantitative. Both complexes had good pigment properties and should prove suitable to plastics, inks, board markers and textile printing. Note de contenu : - Table 1 : The results of melting point measurements and elemental microanalysis
- Table 2 : Quantitative precipitation of Cu (II) and iron (III) by MPN
- Table 3 : ε values, bulk densities and oil absorption of MPN chelates
- Table 4 : Colorimetric data for green and violet pigments. (CIE lab = l*a*b* with source D65 and observer 10°)DOI : 10.1007/BF02699678 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699678.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5450
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B4 (12/2004) . - p. 285-287[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000718 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Printing the light Type de document : texte imprimé Auteurs : Carinna Parraman, Auteur ; Susanne Klein, Auteur Année de publication : 2021 Article en page(s) : p. 86-89 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.2 Colorants et pigments Résumé : This paper explores the relationship between additive and subtractive mixing for colour printing. Using Spectraval mica pigments (Merck)—marketed as RGB pigments—colour is generated by selective reflection and prints are based on additive colour mixing principles, that when printed onto black paper, create white and a range of colours. Although currently used mostly for decorative effects, they can be the basis of additive 'process' inks, that present new opportunities for and challenges to traditional print markets. The viewing angle dependency of their selective reflection favours applications in security printing similar to the holograms on bank cards for example. Traditional measurement and modelling methods are difficult to apply due to the layering and irregular dispersion of pigments. Note de contenu : - Introduction to the challenge
- A brief history of additive colour mixing
- How can we print the light with pigments ?
- Open issues
- Fig. 1 : Transmittance spectra of Lee Tricolour filters
- Fig. 2 : Transmittance spectra of red, green and blue Spectraval pigments
- Fig. 3 : Photograph of beetle directly above the print ; photograph taken at an angleDOI : 10.1111/cote.12523 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12523 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35595
in COLORATION TECHNOLOGY > Vol. 137, N° 1 (02/2021) . - p. 86-89[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22843 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A propos de l'indigo Type de document : texte imprimé Auteurs : Pierre Avenas, Auteur Année de publication : 2019 Langues : Français (fre) Catégories : Colorants végétaux
IndigoIndex. décimale : 667.2 Colorants et pigments Résumé : Le nom indigo vient, par le portugais, de l’adjectif latin indicus, « indien ». En effet, ce colorant bleu, que Pline l’Ancien nommait Indicum caeruleum, « azur indien », était produit dans l’Antiquité à partir des feuilles d’une plante tinctoriale indienne, l’indigotier (Indigofera tinctoria). Depuis Newton, l’indigo est l’une des sept couleurs de l’arc-en-ciel, d’où le nom de l’indium, élément n° 49 découvert en 1863 et ainsi nommé à cause de sa raie spectrale caractéristique située dans l’indigo. Le composant principal de l'indigo naturel est l'indigotine. Note de contenu : - De l'indigotine aussi à partir du pastel
- De l'indigo à l'aniline, et aux colorants d'aniline
- De l'aniline à la mauvéine
- De l'aniline à la fuchsine
- Fig. 1 : Molécule de l'indigotine
- Fig. 2 : Aniline, liquide huileux incolore qui bout à 184°C
- Fig. 3 : Fleur de mauve et molécule de mauvéine
- Fig. 4 : Fuchsia triphylla, Fuchsia magellanica et molécule de fuchsineEn ligne : http://www.lactualitechimique.org/A-propos-de-l-indigo Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33272
in L'ACTUALITE CHIMIQUE > N° 446 (12/2019)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21371 - Périodique Bibliothèque principale Documentaires Disponible A propos de la quercitine et de la quercétine / Pierre Avenas in L'ACTUALITE CHIMIQUE, N° 484-485 (05-06/2023)
PermalinkPermalinkPermalinkRed pigments using the Laux process / Volker Schneider in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 201, N° 4562 (07/2011)
PermalinkReflections on colour trends / Ruth M. Bauer in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/2009 (03/2009)
PermalinkReflections on a sparkling trade / Peter Wissling in EUROPEAN COATINGS JOURNAL (ECJ), N° 1/2011 (01/2011)
PermalinkPermalinkRelative HLB values of the pigment surfaces / Mukund Hulyalkar in PAINTINDIA, Vol. LXIX, N° 1 (01/2019)
PermalinkA rescue of colors from dye-wastewater / Saloana Santina Gomes Santos in L'ACTUALITE CHIMIQUE, N° 444-445 (10-11/2019)
PermalinkResearch in the cold pad–batch dyeing process for wool pretreated by hydrogen peroxide / David M. Lewis in COLORATION TECHNOLOGY, Vol. 125, N° 5 (2009)
PermalinkResearching and mixing heritage colours in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4648 (02/2019)
PermalinkReversible thermochromic performance of cresol red-boric acid system loaded on fibrous mesoporous silica microspheres coating material / Tinting Yu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
PermalinkRevisiting tetranitrophenolsulfonephthalein / Nicolay O. Mchedlov-Petrossyan in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)
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