Orange pigment with high near-infrared reflectivity based on Ce-doped Bi2MoO6

This study developed a series of yellow and orange pigments with enhanced near-infrared reflectivity. These pigments were prepared through high-temperature solid-state reaction, CeO 2 doping, and Bi 2 MoO 6 modification. The pigment samples exhibit Bi 2 MoO 6 related to the monoclinic crystal system, with no discernible peaks of oxide impurities. The pigments were transformed from white to yellow and orange by doping Ce ions, which have better color performance. The reflectance in the infrared spectrum and near-infrared solar reflectance of all pigment samples were found to be greater than 95 %. After 60 min of exposure to infrared radiation, the internal temperature difference between the Bi 1.88 Ce 0.12 MoO 6-δ painted iron house model and Bi 1.88 Ce 0.12 MoO 6-δ unpainted iron house model reached 8 °C. The color change of Bi 1.88 Ce 0.12 MoO 6-δ was minimal in acidic, alkaline, and high-temperature environments, thus confirming its excellent stability. These characteristics indicate that the synthesized Bi 1.88 Ce 0.12 MoO 6-δ pigment has considerable potential in energy saving and multifunctional coatings.