Enhanced Photoluminescence of Tb3+ Ions Ce3+ Ions and SnO2 Nanocrystals Co-doped Silica Thin Films

Abstract

Co-doping Ce 3+ ions and size-tunable SnO 2 nanocrystals into Tb 3+ ions embedded silica thin lms produces a ninefold enhancement of Tb 3+ related emission. Firstly, by optimizing the doping ratio of Sn 4+ ions, the size of SnO 2 nanoparticles was well tailored for achieving a greatly enhanced photoluminescence emission from Tb 3+ ions. Another method to signi cantly enhance Tb 3+ emission was increasing the proportion of Ce 3+ , and this method only require a relatively small amount rare earth (RE) ions for obtaining an obvious emission enhancement. On the other side, companied with the increase of Ce 3+ ions concentration, the growth of CeO 2 nanoparticles were proved seriously attenuated the photoluminescence intensity of Tb 3+ ions. Finally, we also analyzed the in uence of annealing temperature on the photoluminescence intensity. These results indicated that an appropriate proportion of Ce 3+ ions and suitable size of SnO 2 nanocrystals can effectively sensitize the luminescence of Tb 3+ ions.

A biomimetic all-inorganic photocatalyst for the artificial photosynthesis of hydrogen peroxide

“…Also, SnO 2 has broad emission at around 440 nm due to the surface vacancy in the photoluminescence (PL) spectrum (Fig. S14†), 35 and the spectrum hardly changes with the Sb( iii )-surface modification. A significant decrease in the signal intensity is observed with the loading of Au NPs in spite that the unit structure of Au@SnO 2 –Sb( iii ) has only ∼one Au NP.…”

Hydrogen Peroxide Production by Inorganic Photocatalysts Consisting of Gold Nanoparticle and Metal Oxide toward Oxygen Cycle Chemistry

“…The action spectrum of the reaction was similar to that of the photocurrent, indicating that this reaction is induced by the excitation of SnO 2 −Sb(III) NCs. Also, SnO 2 has broad emission around 440 nm due to the surface vacancy in the photoluminescence spectrum, 66 and the spectrum is hardly affected by the Sb(III)-surface modification. A significant decrease in the signal intensity was observed with the loading of Au NPs in spite that the unit structure of Au@SnO 2 −Sb(III) has only ∼one Au NP.…”