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

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

doi:10.1016/j.dyepig.2013.06.030

Cited by 74 publications

(32 citation statements)

References 41 publications

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“…[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: 87%

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%

Novel environment friendly inorganic red pigments based on Bi₄V₂O₁₁

Wendusu

Shiraishi²,

Takeuchi

et al. 2015

RSC Adv.

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“…Inorganic pigments find wide application in paints, inks, glasses, plastics and coloured glazes in which the thermal and chemical stabilities as well as weather‐resistance properties of the pigment materials play a crucial role Most inorganic pigments consist of transition metals (TMs) substituted in the positions of non‐transition‐metal/non‐metal atoms in various colourless metal oxide hosts. Thus, Cu‐substituted apatites, [A 10 (PO 4 ) 6 (Cu x OH 1– x – y ) 2 ] (A = Ca, Sr, Ba), which produce magenta/violet/blue colours, 3d‐TM‐substituted spiroffite, Zn 2 Te 3 O 8 , which yields purple/yellow/green colours, and Co 2+ ‐, Ni 2+ ‐ and Cu 2+ ‐substituted diphosphate, SrZnP 2 O 7 , which give orange, cyan, green and red colours, are some of the TM‐containing pigment materials reported in recent times , .…”

Section: Introductionmentioning

confidence: 99%

Unique Colours of 3d‐Transition‐Metal‐Substituted Lyonsite Molybdates and Their Derivatives: The Role of Multiple Coordination Geometries and Metal‐to‐Metal Charge Transfer

Laha¹,

Natarajan²,

Gopalakrishnan³

2016

Eur J Inorg Chem

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We describe the synthesis, crystal structures, and optical absorption spectra/colours of 3d transition‐metal‐substituted lyonsite‐type oxides Li3Al1–xMIIIx(MoO4)3 (0 < x ≤ 1.0; MIII = Cr, Fe) and Li3–xAl1–xMII2x(MoO4)3 (0 < x ≤ 1.0; MII = Co, Ni, Cu). The oxides were readily synthesized by the solid‐state reaction of stoichiometric mixtures of the constituent binaries at around 700 °C in air. The crystal structures determined by Rietveld refinement of PXRD data revealed that in the smaller trivalent‐metal‐substituted lyonsite oxides, the MIII ions occupy the octahedral (8d, 4c) sites and the lithium ions occur exclusively at the trigonal‐prismatic (4c) site in the orthorhombic (Pnma) structure. On the other hand, larger divalent‐metal (CoII/CuII)‐substituted derivatives show occupancy of the CoII/CuII ions at both the octahedral and trigonal‐prismatic sites. We have investigated the colours and optical absorption spectra of Li3Al1–xMIIIx(MoO4)3 (MIII = Cr, Fe) and Li3–xAl1–xMII2x(MoO4)3 (MII = Co, Ni, Cu) and interpreted the results in terms of the average crystal field strengths experienced by MIII/MII ions in multiple coordination geometries. We have also identified the role of metal‐to‐metal charge transfer (MMCT) from the partially filled transition metal 3d orbitals to the empty Mo 4d orbitals in the resulting colours of these oxides.

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“…Bismuth Vanadate (BiVO 4 ) has been attracted widespread interest in recent years due to its unique properties for conductors, gas sensing and pigment [1][2][3]. Especially, BiVO 4 is a highly promising candidate for the application of photocatalytic degradation of organic pollution and photocatalytic water oxidation due to its narrow band gap, fast charge transfer rate and high stability [4,5].…”

Section: Introductionmentioning

confidence: 99%