Synthesis and Characterization of Tb3+-Activated TiO2 Photoluminescence Nanomaterials

Özet

As compared to other semiconductor photocatalysts, titanium dioxide has so far been shown to be the most promising material used for both fundamental research and practical applications, because it exhibits a higher photoreactivity and it is cheap, nontoxic, chemically and biologically inert, and photostable. Rare earth ions (RE3+) are preferred as dopant elements due to their high densities and high light yields. Tb3+ doped TiO2 nanoparticles offer several advantages such as broad absorption band, high emission intensity, long lifetime, stability. TiO2: 1%Tb3+ nanoparticles, were produced at 550 degrees by the sol-gel method. Particle size analysis, XRD, DTA-TG, FTIR, SEM, and PL analyzes of the synthesized nanomaterials were performed. In the anatase crystal structure, the dimensions of the nanoparticles were measured below 100 nm and were observed in the microstructure where the particles were clustered in places. When the nanoparticles were excited at 275 nm, green emission bands of Tb3+ ions at 544 nm and 585 nm were observed. This wavelength is attributed to electronic transitions 5D4 → 7F5 and 5D4 → 7F4, respectively.