Synthesis and color tuning of titanium oxide inorganic pigment by phase control and mixed-anion co-doping

Jindi Cao, Takuya Hasegawa, Yusuke Asakura, Peng Sun, Shuo Yang, Bin Li, Wenbin Cao, Shu Yin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

B and N co-doped anatase, rutile, and brookite TiO2 (abbreviated as BN-Ana, BN-Rut, and BN-Bro) were successfully synthesized. The apparent color of as-obtain BN-Ana, BN-Rut and BN-Bro was red, cyan and yellow-green, respectively. The mechanisms of various coloring were concluded as the different band gap configurations and the formation of covalent B-N bonding. The nitridation time expressed less effect on changing the color. On the contrary, nitridation temperature enabled the distinct color changes by altering the brightness. Lower temperature, fewer doping concentration, and brighter apparent color, vice versa. Through tuning the brightness, a gradient of yellow-orange-red was achieved in the case of BN-Ana, as well the transitions of grey-to-cyan and white-to-pale-yellow were achieved in BN-Rut and BN-Bro, respectively. This research proposed a method for the synthesis of color-full titania pigment without the addition of other toxic transition metal elements.

Original languageEnglish
Article number103576
JournalAdvanced Powder Technology
Volume33
Issue number5
DOIs
Publication statusPublished - 2022 May

Keywords

  • Co-doping
  • Color-full titania
  • Mixed anion compounds
  • Pigment

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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