Abstract
Titanate nanotubes (TiNTs) were synthesized by the microwave-assisted alkaline hydrothermal method, ionically exchanged with rare earth ions (RE) (La3+, Ce4+, Pr3+, Nd3+, Er3+, and Yb3+) (RE-TiNTs), and subjected to thermal treatment. The thermal treatment aimed at structural and morphological changes in the nanotubes in order to generate differentiated optical properties. The RE-TiNTs displayed significant changes in optical absorption and PL intensity compared to the NaTiNTs, which correlated with the temperature of treatment. The PL spectra of the samples was related to the morphological and structural changes of the TiNTs intercalated with RE, indicating that the RE insertion together with the existing oxygen vacancies directly influence the PL emission. The optimization/engineering of the optical properties of the produced nanomaterials could enable their use in applications in optoelectronics and photonics, such as photoluminescent devices, displays, and lasers.
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