TiO2@CoTiO3 complex green pigments with low cobalt content and tunable color properties
Source abstract
Abstract
Abstract Green complex pigments with TiO 2 @CoTiO 3 core–shell structure were prepared through calcination of precursors obtained from the precipitation of Co 2+ on TiO 2 particles. The synthesized pigments were characterized by colorimetry, near-infrared diffuse reflectance spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and ultraviolet–visible (UV–vis) spectroscopy. The pigments were found to consist of a rutile TiO 2 core and outer ilmenite CoTiO 3 shell. The green pigments with good color properties could be obtained via calcination of the precursors at 800 °C. The pigments with Co/Ti ratio of 0.4 had the highest green component value and exhibited good color properties ( L *=49.51, a *=−34.58, b *=5.53). The color properties could be tuned by just changing the Co/Ti ratio. The as-prepared complex pigments exhibited an enhanced near-infrared reflectance compared with pure CoTiO 3 pigments and also exhibited better color properties than the mixed pigments of TiO 2 and CoTiO 3 . Further, the complex pigments had much lower consumption of cobalt compared to pure CoTiO 3 and Co 2 TiO 4 pigments. The special core–shell structure was found to be responsible for the enhanced near-infrared reflectance and good color properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Pigment Synthesis and Properties · Cultural Heritage Materials Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Mineralizer effects on the synthesis of amorphous chromium hydroxide and chromium oxide green pigment using hydrothermal reduction method10.1016/j.dyepig.2014.09.021 ↗
2. Influence of composition on near infrared reflectance properties of M-doped Cr2O3 (M=Ti,V) green pigments10.2109/jcersj2.122.311 ↗
3. Functional pigments from chromium(III) oxide nanoparticles10.1016/j.dyepig.2012.03.019 ↗
4. Application of LnCrTeO6 oxides as new ceramic pigments of the type “green chromium”10.1016/j.ceramint.2013.06.042 ↗
5. Black and green pigments based on chromium–cobalt spinels10.1016/j.matchemphys.2011.05.001 ↗
6. Synthesis and characterization of Co1−xZnxCr2−yAlyO4 as a near-infrared reflective color tunable nano-pigments10.1016/j.dyepig.2014.09.030 ↗
7. A novel pyrophosphate BaCr2(P2O7)2 as green pigment with high NIR solar reflectance and durable chemical stability10.1016/j.solidstatesciences.2014.05.016 ↗
8. Novel environment-friendly green pigments based on rare earth cuprate10.1016/j.dyepig.2014.09.007 ↗
9. Environmentally benign novel green pigments: Pr1−xCaxPO4 (x=0−0.4)10.1007/BF02711264 ↗
10. Green colored nano-pigments derived from Y2BaCuO5: NIR reflective coatings10.1016/j.dyepig.2014.03.025 ↗
11. Solar spectral optical properties of pigments–Part II: survey of common colorant10.1016/j.solmat.2004.11.013 ↗
12. Structural analysis and characterization of doped spinel Co2−xMxTiO4 (M=Mg2+, Mn2+, Ni2+, Cu2+ and Zn2+) coated mica composite pigments10.1016/j.ceramint.2014.12.130 ↗
13. G. Buxbaum, G. Pfaff, Industrial Inorganic Pigments, 3rd ed., 2005, P115.10.1002/3527603735 ↗
14. Blue pigments based on CoxZn1−xAl2O4 spinels synthesized by the polymeric precursor method10.1016/j.dyepig.2008.09.017 ↗
15. Cobalt minimisation in willemite (CoxZn2−xSiO4) ceramic pigments10.1039/b000748j ↗
16. Colour analysis of some cobalt-based blue pigments10.1016/S0955-2219(00)00295-8 ↗
17. The methods for creating energy efficient cool gray building coatings–Part II: preparation from pigments of complementary colors and titanium dioxide rutile10.1016/j.solmat.2014.07.043 ↗
18. The methods for creating energy efficient cool gray building coatings–Part I: preparation from white and black pigments10.1016/j.solmat.2014.07.044 ↗
19. The preparation and characteristics of pigments based on mica coated with metal oxides10.1016/S0143-7208(03)00086-X ↗
20. The preparation and characteristics of cobalt blue colored mica titania pearlescent pigment by microemulsions10.1016/j.dyepig.2006.08.020 ↗
21. Characterization of CoTiO3 Nanocrystallites prepared by homogeneous precipitation method
22. Preparation and characterization of bi- and trimetallic titanium based oxides10.1016/j.dyepig.2010.10.004 ↗
23. General synthesis and optical properties of monodisperse multifunctional metal-ion-doped TiO2 hollow particles10.1021/jp906937e ↗
24. Synthesis and characterization of ilmenite-type cobalt titanate powder10.1002/jccs.201000129 ↗
25. CoTiO3 via cobalt oxalate–TiO2 precursor synthesis and characterization10.1016/j.matchar.2012.06.009 ↗
26. Synthesis, characterization and optical bandgap of the Co2TiO4 nanoparticles10.1016/j.mssp.2014.12.043 ↗
27. Preparation and characterization of Co-doped TiO2 materials for solar light induced current and photocatalytic applications10.1016/j.matchemphys.2012.04.062 ↗
28. Highly dispersed (Cr, Sb)-co-doped rutile pigments of cool color with high near-infrared reflectance10.1016/j.dyepig.2014.05.009 ↗
29. Low temperature preparation of Cr-doped rutile pigments with good colour properties10.1016/j.dyepig.2012.12.004 ↗
30. Synthesis, characterization, and microwave dielectric properties of ATiO3 (A=Co, Mn, Ni) ceramics10.1111/j.1551-2916.2006.01004.x ↗
31. Synthesis and characterization of titanates of the formula MTiO3 (M=Mn, Fe, Co, Ni and Cd) by co-precipitation of mixed metal oxalates10.1016/j.poly.2008.11.056 ↗
32. Preparation and spectroscopic characterization of ilmenite-type CoTiO3 nanoparticle10.5012/bkcs.2006.27.3.368 ↗
33. Titania-supported cobalt and cobalt–phosphorus catalysts: characterization and performances in ethane oxidative dehydrogenation10.1006/jcat.2001.3262 ↗
34. Cr-doped titanite pigment based on industrial rejects10.1016/j.cej.2009.12.026 ↗
35. Sol–gel ceramic pigments10.4028/www.scientific.net/KEM.150.15 ↗
36. Spectral response data for development of cool coloured tile coverings10.1016/j.optlastec.2009.07.001 ↗
37. Cooler tile-roofed buildings with near-infrared-reflective non-white coatings10.1016/j.buildenv.2006.06.005 ↗
38. Synthesis and characterization of blue TiO2/CoAl2O4 complex pigments with good colour and enhanced near-infrared reflectance properties10.1039/C5RA17418J ↗