The present study illustrates the development of an environmentally benign intense orange inorganic pigment, by substituting Si metal ion at the Bi site of BiVO via solid-state method. The partial replacement of Si, induced a strain in the crystal lattice of the compound, which resulted in a substantial improvement in the visible light reflectance. A reduction in oxygen deficiency in the lattice structure facilitated the colour tuning of the pigment series from brownish red to orange and then on to yellowish orange. The composition BiSiVO exhibited a bright orange hue with colour co-ordinates a* = 39, b* = 34 and L* = 52. Furthermore, NIR solar reflectance of the pigment was 86%, which is superior than the reported and commercial orange pigments. Compared to commercial pigment coatings, BiSiVO achieved a temperature reduction of 2 °C inside a foam model house. An exceptional corrosion resistance of 1.6 × 10 Ωcm, was registered by the pigment loaded epoxy coating with good stability. The corrosion inhibition mechanism of the pigment operates through the hand in hand working of passive Bi-O and Si-O, active FeOOH and vanadate moiety. On the whole, the new multifunctional orange pigment has the potential to be a viable replacement for the toxic commercial pigments in the market.

中文翻译：

---

适用于冷涂料应用的环保多功能橙色颜料

本研究阐述了通过固态方法在 BiVO 的 Bi 位点上取代 Si 金属离子，开发出一种环境友好的深橙色无机颜料。 Si的部分替代引起了化合物晶格的应变，从而导致可见光反射率的显着提高。晶格结构中氧缺陷的减少促进了颜料系列的颜色从棕红色到橙色，然后再到黄橙色。 BiSiVO 组合物表现出明亮的橙色色调，色坐标 a* = 39、b* = 34 和 L* = 52。此外，该颜料的近红外太阳光反射率为 86%，优于报道的和商业的橙色颜料。与商业颜料涂料相比，BiSiVO 在泡沫模型室内实现了 2 °C 的温度降低。负载颜料的环氧涂层具有良好的稳定性，具有 1.6 × 10 Ωcm 的优异耐腐蚀性。该颜料的缓蚀机制是通过钝态 Bi-O 和 Si-O、活性 FeOOH 和钒酸盐部分的协同作用发挥作用的。总体而言，新型多功能橙色颜料有潜力成为市场上有毒商业颜料的可行替代品。