Novel environmentally friendly (Bi, Ca, Zn, La)VO4 inorganic yellow pigments

Wendusu,; Honda, T.; Masui, Toshiyuki; Imanaka, Nobuhito

doi:10.1039/c3ra43978j

Cited by 35 publications

(17 citation statements)

References 27 publications

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“…In our previous works, it has been elucidated that lattice shrinkage positively affects the colour properties by modulating the width of valence band, whereas, an excess amount of oxide anion vacancies gives a negative effect on the colour properties. [17][18][19] In accordance with these facts, in the present study, oxide anion deciencies in the Bi 4 V 2 O 11 lattice were lled by the…”

Section: Introductionsupporting

confidence: 87%

“…[17][18][19] In accordance with these facts, in the present study, oxide anion deciencies in the Bi 4 V 2 O 11 lattice were lled by the calcination in a ow of pure oxygen, accompanying with the oxidation state change of a part of bismuth ions from Bi 3+ to Bi 5+ . [17][18][19] In accordance with these facts, in the present study, oxide anion deciencies in the Bi 4 V 2 O 11 lattice were lled by the calcination in a ow of pure oxygen, accompanying with the oxidation state change of a part of bismuth ions from Bi 3+ to Bi 5+ .…”

Section: Introductionsupporting

confidence: 86%

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Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Wendusu

Shiraishi²,

Takeuchi

et al. 2015

RSC Adv.

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Novel environment friendly inorganic red pigments, (Bi 1ÀxÀy Zr x Al y ) 4 V 2 O 11+d (0 # x # 0.15; 0 # y # 0.10), were successfully synthesized by a conventional solid state reaction method, and their colour properties were characterized. The colour of the obtained pigments was dependent on the calcination condition and the sample composition, and the highest red hue was obtained for the (Bi 0.92 Zr 0.07 Al 0.01 ) 4 V 2 O 11.34 pigment calcined at 800 C for 10 h in a flow of pure O 2 . The a* value corresponding to the red chromaticity of this pigment was +41.9, which was significantly greater than that of the commercial iron oxide pigment (a* ¼ +28.9). Bi 4 V 2 O 11 is considered to be a nontoxic compound, and the other components (Zr and Al) are also safe elements. Therefore, the present pigment could be an attractive candidate as a novel environment friendly inorganic red pigment.

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Section: Introductionsupporting

confidence: 87%

Section: Introductionsupporting

confidence: 86%

Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Wendusu

Shiraishi²,

Takeuchi

et al. 2015

RSC Adv.

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“…The b* value obtained for x = 0.025 is higher than commercial BiVO 4 (Sicopal Yellow L1100). 56 This implies the potential utility of the developed pigments for coloring applications.…”

Section: Resultsmentioning

confidence: 99%

Probing structural variation and multifunctionality in niobium doped bismuth vanadate materials

et al. 2014

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Multifunctional materials are developed in BiV1-xNbxO4 solid solutions via structural variations. A citrate gel route has been employed to synthesize these materials followed by calcination at various temperatures leading to fine particles. The effects of niobium doping over the structural variation and its influence on the optical properties are assessed by powder X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-Vis-NIR spectroscopy. These solid solutions exhibit superior coloristic properties which are comparable to commercially available yellow pigments. These materials also show remarkable reflectance in the NIR region which makes them potential candidates for cool roof applications. A notable methylene blue dye degradation property is observed in Nb(5+) doped BiVO4 under sunlight irradiation.

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“…Rare earth elements have abundant physical properties, such as light and electricity, and chemical activities, so many rare earth-doped yellow pigments, such as Zr-doped Y 4 MoO 9 , Sr 2– x Ba x Ce 0.6 Tb 0.4 O 4 , Pr 3+ /Cr 3+ -doped BaTiO 3 , etc., have been reported. − Han et al studied Mo-doped Bi 2 WO 6 , Ce-doped Y 3 Al 5 O 12 , and Cr-doped BaTiO 3 series of inorganic pigments, which have high near-infrared reflectivity. − BiVO 4 -based compounds with a bright yellow hue have been widely studied and applied by researchers. , Bismuth vanadate (BiVO 4 ) has the following three crystal types: tetragonal scheelite (ts-BiVO 4 ), tetragonal zircon type (tz-BiVO 4 ), and monoclinic scheelite type (ms-BiVO 4 ) . ts-BiVO 4 and ms-BiVO 4 are widely used as yellow pigments.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Yellow Pigments (Li_0.4RE_0.6Al_0.6)_1/2MoO₄–BiVO₄ with High NIR Reflectance

Feng

Xiao

et al. 2021

ACS Sustainable Chem. Eng.

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In this work, a new type of near-infrared (NIR) reflective yellow pigment with a general formula of [(Li 0.4 RE 0.6 Al 0.6 ) x/2 Bi 1−x ][Mo x V 1−x ]O 4 was prepared by a solid-phase reaction calcined at a high temperature of 700 °C. Xray diffraction (XRD), scanning electron microscope (SEM), a UV−vis−NIR spectrophotometer, and other methods were used to characterize the structure, morphology, and optical properties of synthetic pigments. For a series ofO 4 pigments, when x > 0.2, bismuth vanadate changes from the monoclinic phase (space group I2/b(15)) to the tetragonal scheelite phase (space group I4 1 /a(88)). The structures of the pigments are all tetragonal scheelite phases, and the difference in their color rendering is mainly due to the differences between the valence band and the conduction band and the difference in the band gap caused by different rare earth elements. The NIR reflectance (R %) and NIR solar reflectance (R* %) of [(Li 0.4 La 0.6 Al 0.6 ) 0.1 Bi 0.8 ][Mo 0.2 V 0.8 ]O 4 pigments are 96.64 and 93.10% (b* = 77.13, C* = 77.6), respectively. In the acid and alkali resistance test, the color difference values ΔE* of the pigment before and after soaking are less than 5. Finally, the thermal infrared test of the synthetic pigments and commercial pigments on galvanized plates without or with TiO 2 was performed. The experimental results show that the temperature difference between the synthetic pigment and commercial bismuth yellow can reach 11 °C. Therefore, it is believed that the synthetic pigment can reflect more heat radiation from sunlight and has better heat insulation performance. The synthetic pigment has higher reflectivity than the commercially available bismuth vanadate pigment, showing its application potential.

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Novel environmentally friendly (Bi, Ca, Zn, La)VO4 inorganic yellow pigments

Cited by 35 publications

References 27 publications

Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Probing structural variation and multifunctionality in niobium doped bismuth vanadate materials

Synthesis and Characterization of Yellow Pigments (Li_0.4RE_0.6Al_0.6)_1/2MoO₄–BiVO₄ with High NIR Reflectance

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Novel environmentally friendly (Bi, Ca, Zn, La)VO4 inorganic yellow pigments

Cited by 35 publications

References 27 publications

Novel environment friendly inorganic red pigments based on Bi4V2O11

Novel environment friendly inorganic red pigments based on Bi4V2O11

Probing structural variation and multifunctionality in niobium doped bismuth vanadate materials

Synthesis and Characterization of Yellow Pigments (Li0.4RE0.6Al0.6)1/2MoO4–BiVO4 with High NIR Reflectance

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Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Synthesis and Characterization of Yellow Pigments (Li_0.4RE_0.6Al_0.6)_1/2MoO₄–BiVO₄ with High NIR Reflectance