科研之友
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摘要
A series of novel high dispersed environmental-friendly nanopigments based on NiTiO3doped with rare earth ion such as Y, La, Eu, Sm have been developed. The products were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), commission internationale de l'Eclairage (CIE) 1976 L∗α∗b∗color scales and UV-Vis-near-infrared radiation (NIR) reflectance spectroscopy. The substitution of R3+for Ni2+in NiTiO3can improve the yellowness of pigments, especially for Eu3+substitution. The sample with the substitution of Eu3+for Ni2+processes the highest NIR reflectance and enhances the NIR reflectance to 89.0%. SEM results revealed that the obtained pigments were composed of well-dispersed spherical-like particles with the range of 40-60 nm. EDS results indicated that the distribution of Ni, Ti, R, O element was considerably uniform with no chemical segregation phenomenon.
