High near-infrared reflectance Zn1-xMnxO yellow pigment prepared and properties by co-precipitation method

A successful synthesis of yellow pigments, namely Zn1-xMnxO (x = 0.001–0.009), was achieved using the co-precipitation method. To characterize the prepared pigments, various analytical techniques were employed, including powder X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric-differential scanning calorimetry (TG-DSC). The results showed that the Zn1-xMnxO series pigments prepared by co-precipitation method retained the ZnO fibrous zincite structure and all had a good yellow color (b*=30.14–40.56) and high NIR solar reflectance (80.66 %-87.80 %). The results of the simulated heat shielding experiments confirmed that the Zn0.997Mn0.003O (abbreviated as ZM3) pigment synthesized in the study was 5°C cooler than the commercial iron yellow pigment, and the thermal imaging experiments showed that the surface temperature of the sample coatings was reduced by 8°C, which further confirmed that the ZM3 pigment had good heat shielding properties. Furthermore, the pigment demonstrates excellent chemical and thermal stability. and can be used as a cold pigment in architectural coatings to obtain energy-saving effects, which has great potential for development. [Display omitted] •A successful synthesis of yellow pigments, namely Zn1-xMnxO (x=0.001-0.009), was achieved using the co-precipitation method.•The Zn1-xMnxO series of pigments prepared by co-precipitation method retained the ZnO fibrous zincite structure.•The Zn0.997Mn0.003O pigment synthesized in the study has a good heat shielding properties.•The pigment suitable as a cold pigment in architectural coatings for achieving energy-saving effects.