论文部分内容阅读
Pr-CeO2 Nano-crystalline red pigments were prepared by low-temperature com- bustion with a later hydrothermal treatment using Ce(NO3)3·6H2O and Pr6O11 as raw materials. The phase composition, coloring mechanism and morphology of pigments were analyzed by XRD, SEM, EDS and XPS. Results showed that Pr-CeO2 solid solution with a fluorite structure was obtained by the diffusion of Pr+3 into CeO2 crystal lattice during the synthesis process. XPS analysis indicated that Pr+3 substitutes Ce+4 in CeO2 and is compensated by oxygen vacancies. Compared with low-temperature combustion synthesis, the Pr-CeO2 pigments prepared with a subsequent hydrothermal treatment have an average grain size of about 16.70 nm, and the crystallinity and red tonality are improved.
Pr-CeO2 Nano-crystalline red pigments were prepared by low-temperature com- bustion with a later hydrothermal treatment using Ce (NO3) 3 · 6H2O and Pr6O11 as raw materials. The phase composition, coloring mechanism and morphology of pigments were analyzed by XRD , SEM, EDS and XPS. Results showed that Pr-CeO2 solid solution with a fluorite structure was obtained by the diffusion of Pr + 3 into CeO2 crystal lattice during the synthesis process. XPS analysis indicated that Pr + 3 substitutes Ce + 4 in CeO2 Compared with low-temperature combustion synthesis, the Pr-CeO2 pigments prepared with a subsequent hydrothermalothermal treatment have an average grain size of about 16.70 nm, and the crystallinity and red tonality are improved.