Sol–gel synthesis and properties of europium–strontium copper silicates blue pigments with high near-infrared reflectance

Zhang, Yanshuang; Zhang, Yubai; Zhao, Xuejiao; Zhang, Yujun

doi:10.1016/j.dyepig.2016.04.011

Cited by 25 publications

(9 citation statements)

References 16 publications

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“…Thus, different ways of obtaining this material have been developed in order to discover better features and performances, so the study of pigments with a better performance and lower toxicity has been developed. The use of the blue pigment has always been investigated and nowadays it is applied in modern technologies for the production of ceramics, tiles for decoration, and jet printers ink, which enables high performance ceramic coatings [1][2][3][4][5][6][7], as well as in developing cool pigments, which are currently called ecofriendly [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

Gomes

Silva

et al. 2018

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

Gomes

Silva

et al. 2018

Ceramics International

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“…The near-infrared reflectance and spectral irradiance in a range of 700–2500 nm are clearly shown in Figure ; it can be obviously observed in Figure a that the ZnWO 4 pigment has the highest near-infrared reflectance of 96.66%. When the chromophore ions have replaced the Zn 2+ ion, the near-infrared reflectance in a wavelength range of 1300–2100 nm has slightly decreased; however, the colorful pigments still keep a relatively higher near-infrared reflectance compared with the commonly reported near-infrared reflectance pigments, such as the specific Ce 0.8 Bi 0.2 O 2 yellow pigment ( R = 87.31%), Sr 0.6 Eu 0.4 CuSi 4 O 10+σ blue pigment ( R = 57.07%), LaFe 0.7 Al 0.3 O 3 brown pigment ( R = 52.50%), and Bi 0.6 Cr 0.4 PO 4 pale green pigment ( R = 84.63%). , There is a difference in the near-infrared reflectance between the Mn 2+ -doped pigment and Co 2+ -doped pigment; this may be the reason for the absorbed radiance energy of the Zn 0.9 Co 0.1 WO 4 pigment that is located in the NIR region. At the same time, the spectral irradiance of these pigments takes up a large proportion of solar irradiance, which indicates that these pigments used in coatings can reflect lots of heat, and all of them are promising candidates as cool pigments to save energy.…”

Section: Resultsmentioning

confidence: 98%

High Near-Infrared Reflective Zn_1–xA_xWO₄ Pigments with Various Hues Facilely Fabricated by Tuning Doped Transition Metal Ions (A = Co, Mn, and Fe)

Zhou

Liu

et al. 2021

Inorg. Chem.

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A series of novel transition metal ion-substituted Zn1–x A x WO4 (A = Co, Mn, and Fe, 0 < x ≤ 0.1) inorganic pigments with blue, yellow, brown, and pale green colors have been prepared by a solution combustion method and exhibit extremely high near-infrared reflectance (R > 85%). X-ray energy-dispersive spectroscopy analysis makes it clear that transition metal ions have already been incorporated into the host ZnWO4 lattice and do not change the lattice’s initial wolframite structure. The optical absorption spectrum in the UV region of the ZnWO4 pigment calcined at 800 °C for 3 h is a ligand-to-metal charge transfer from O 2p nonbonding orbits to antibonding W 5d orbits. On account of the doping Co2+ (3d7), Mn2+ (3d5), and Fe3+ (3d5) transition metal ions, these chromophore ions have occupied the distorted octahedral site of Zn2+, leading to d–d transition and metal-to-metal charge transfer from the occupied 3d orbits of A2+ to unoccupied W 5d orbits in UV and visible ranges and generating some bright colors. Significantly, these inorganic pigments are also endowed with excellent thermal and chemical stability and are conducive to harsh working conditions. All of the analysis results have offered some design strategies for various colorful inorganic pigments with high near-infrared reflectance.

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“…This topic has gained more attention over the past decades. So far, various types of NIR-reflective pigments exhibiting blue [4][5][6], green [7][8][9], yellow [10][11][12][13][14] and brown [10][11][12][15][16] color hues were synthesized by several methods, including co-precipitation, hydrothermal, sol-gel, solid-state reac-tion, etc. Recently, special interest has been paid to the preparation of NIR-reflective dark pigments for roof coating.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS

Suwan¹

2020

Ceramics - Silikaty

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NIR-reflective Ni-doped ZnFe 2 O 4 black pigments with the general formula of Zn (1-x) Ni x Fe 2 O 4 have been synthesized by a conventional solid-state reaction of ZnO, Fe 2 O 3 and NiO. The effect of Ni doping was studied by adding various amounts of NiO, with x ranging from 0 to 1. Proportional amounts of ZnO, Fe 2 O 3 and NiO were homogeneously mixed together by means of wet milling, followed by filtration and drying. Then, the mixtures were calcined at 1000 and 1100 °C for 3 h. XRD analysis of the undoped pigments revealed the presence of pure ZnFe 2 O 4 in all synthesis conditions. The addition of NiO dopant into the ZnFe 2 O 4 caused a gradual shift of the diffraction peaks toward higher angles due to the substitution of Zn 2+ by the smaller Ni 2+ to form the Zn (1-x) Ni x Fe 2 O 4. Upon the increase of NiO doping content and calcination temperature, the color hue of the pigments changed from light brown to brownish black, and a gradual reduction of the NIR reflectance was observed. For the black pigments which were synthesized at 1100 °C, the band-gap energy changed from 2.05 eV for ZnFe 2 O 4 (x = 0) to 1.65 eV for NiFe 2 O 4 (x = 1). At the optimum synthesis condition, resulting in black color hue and high NIR reflectance, the Zn 0.5 Ni 0.5 Fe 2 O 4 pigment synthesized at 1100 °C had high NIR reflectance of 55.3 %.

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Sol–gel synthesis and properties of europium–strontium copper silicates blue pigments with high near-infrared reflectance

Cited by 25 publications

References 16 publications

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

High Near-Infrared Reflective Zn_1–xA_xWO₄ Pigments with Various Hues Facilely Fabricated by Tuning Doped Transition Metal Ions (A = Co, Mn, and Fe)

EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS

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Sol–gel synthesis and properties of europium–strontium copper silicates blue pigments with high near-infrared reflectance

Cited by 25 publications

References 16 publications

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

Synthesis and characterization of Y (In, Mn) O3 blue pigment using the complex polymerization method (CPM)

High Near-Infrared Reflective Zn1–xAxWO4 Pigments with Various Hues Facilely Fabricated by Tuning Doped Transition Metal Ions (A = Co, Mn, and Fe)

EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS

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High Near-Infrared Reflective Zn_1–xA_xWO₄ Pigments with Various Hues Facilely Fabricated by Tuning Doped Transition Metal Ions (A = Co, Mn, and Fe)