Columnar Gd₂O₃:Eu³⁺/Tb³⁺ phosphors: preparation, luminescence properties and growth mechanism

Abstract

Columnar Gd2O3:Eu3+/Tb3+ phosphors were successfully prepared by a solvothermal method and subsequent calcination process.

Solvothermal synthesis of columnar Gd2O2S:Eu3+ and a comparative study with columnar Gd2O3:Eu3+

“…According to the results in Figures and , the concentration quenching of Eu 3+ is 5% for Gd 2 O 2 S:Eu 3+ nanocrystals. In comparison, the quenching concentration of Gd 2 O 3 :Eu 3+ is 4% . The reasons for this quenching effect may include the following.…”

“…By comparing the emission spectrum of Gd 2 O 3 :Eu 3+ (as shown in literature 35 ) and Gd 2 O 2 S:Eu 3+ , it can be found that there are several differences. First, the optimum excitation wavelength (329 nm) of Gd 2 O 2 S:Eu 3+ is larger than that (250 nm) of Gd 2 O 3 :Eu 3+ .…”

“…In comparison, the quenching concentration of Gd 2 O 3 :Eu 3+ is 4%. 35 The reasons for this quenching effect may include the following. One is that activators Eu 3+ ions were accumulated under the condition of high concentration of Eu 3+ ions.…”

Polyvinyl Alcohol Polymer Functionalized Graphene Oxide Decorated with Gadolinium Oxide for Sequestration of Radionuclides from Aqueous Medium: Characterization, Mechanism, and Environmental Feasibility Studies

“…Hence, both GO and PGO-Gd are presumed to contain an abundance of oxygenated surface functional groups, and that PGO-Gd, some of oxygen-containing groups replaced with Gd 2 O 3 nanoparticles. At 1200 • C, weight loss for GO was ~67%, and PGO-Gd was observed 26%, which was related to the formation of cubic Gd 2 O 3 by the phase transition from hexagonal Gd(OH) 3 of PGO-Gd [38]. These results suggest a higher stability and surface functionality of PGO-Gd than that of GO.…”

“…12-0797). This indicates the successful integration of Gd 2 O 3 into PGO [38]. The TGA approach was used to measure the amount of oxygenated functionals on the surface of GO and PGO-Gd by oxidative decomposition from 25 • C to 1200 • C at a rate of 10 • C min −1 , as illustrated in Figure S1.…”