Preparation and photoluminescence properties of europium ions doped TiO2 nanocrystals.

Preparation and photoluminescence properties of europium ions doped TiO2 nanocrystals.

Journal of nanoscience and nanotechnology (2013-08-02)

Hai Liu, Lixin Yu

ABSTRACT

In this paper, pure and Eu3+ doped TiO2 nanocrystals (NCs) have been fabricated successfully by a two steps of sol-gel and hydrothermal methods. The microstructures, morphologies and photoluminescent properties of Eu(3+)-TiO2 were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL). XRD and PL results show that the existent of rare earth can inhibit the transformation of TiO2 NCs from anatase to rutile phase and can improve the luminescence intensity of the prepared samples. The room-temperature PL emission of the as-grown samples is dominated by the 5D(0)-7F(j) transitions of Eu3+ ions. But the luminescence intensity drops dramatically when the annealing temperature reaches a relatively high degree because of the formation of the rutile phase of TiO2 NCs hosts.

MATERIALS

Product Number

Brand

Product Description

204757

Sigma-Aldrich

Titanium(IV) oxide, rutile, ≥99.98% trace metals basis

305812

Sigma-Aldrich

Titanium, 5-10 mm, ≥99.99% trace metals basis (purity exclusive of Na and K content)

224227

Sigma-Aldrich

Titanium(IV) oxide, rutile, powder, <5 μm, ≥99.9% trace metals basis

204730

Sigma-Aldrich

Titanium(IV) oxide, rutile, 99.995% trace metals basis

700347

Sigma-Aldrich

Titanium(IV) oxide, mixture of rutile and anatase, nanoparticles, <150 nm particle size (volume distribution, DLS), dispersion, 40 wt. % in H₂O, 99.5% trace metals basis

637262

Sigma-Aldrich

Titanium(IV) oxide, rutile, nanopowder, <100 nm particle size, 99.5% trace metals basis

IRMM531B

Titanium, IRMM^®, certified reference material, 0.5 mm foil

IRMM531C

Titanium, IRMM^®, certified reference material, 0.5 mm wire

267902

Sigma-Aldrich

Titanium, wire, diam. 0.81 mm, 99.7% trace metals basis

348791

Sigma-Aldrich

Titanium, foil, thickness 0.127 mm, 99.7% trace metals basis

266035

Sigma-Aldrich

Titanium, wire, diam. 1.0 mm, 99.99% trace metals basis

635057

Sigma-Aldrich

Titanium(IV) oxide, rutile, <001>, (single crystal substrate), ≥99.9% trace metals basis, L × W × thickness 10 mm × 10 mm × 0.5 mm

460400

Sigma-Aldrich

Titanium, wire, diam. 0.25 mm, 99.7% trace metals basis

369489

Sigma-Aldrich

Titanium, foil, thickness 2.0 mm, 99.7% trace metals basis

348848

Sigma-Aldrich

Titanium, foil, thickness 0.025 mm, 99.98% trace metals basis

634662

Sigma-Aldrich

Titanium(IV) oxide, mixture of rutile and anatase, nanopowder, <100 nm particle size (BET), 99.5% trace metals basis

433667

Sigma-Aldrich

Titanium, evaporation slug, diam. × L 6.3 mm × 6.3 mm, ≥99.99% trace metals basis

232033

Sigma-Aldrich

Titanium(IV) oxide, anatase, powder, 99.8% trace metals basis

30-2730

Sigma-Aldrich

Titanium(IV) oxide, JIS special grade, ≥99.0%

348805

Sigma-Aldrich

Titanium, foil, thickness 0.5 mm, 99.99% trace metals basis

268496

Sigma-Aldrich

Titanium, powder, −100 mesh, 99.7% trace metals basis

460397

Sigma-Aldrich

Titanium, foil, thickness 0.127 mm, ≥99.99% trace metals basis

267503

Sigma-Aldrich

Titanium, foil, thickness 0.25 mm, 99.7% trace metals basis

248576

Sigma-Aldrich

Titanium(IV) oxide, anatase, powder, −325 mesh, ≥99% trace metals basis

718467

Sigma-Aldrich

Titanium(IV) oxide, nanopowder, 21 nm primary particle size (TEM), ≥99.5% trace metals basis

348864

Sigma-Aldrich

Titanium, wire, diam. 0.5 mm, 99.99% trace metals basis

637254

Sigma-Aldrich

Titanium(IV) oxide, anatase, nanopowder, <25 nm particle size, 99.7% trace metals basis

366994

Sigma-Aldrich

Titanium, powder, <45 μm avg. part. size, 99.98% trace metals basis

677469

Sigma-Aldrich

Titanium(IV) oxide, contains 1% Mn as dopant, nanopowder, <100 nm particle size (BET), ≥97%

IRMM531A

Titanium, IRMM^®, certified reference material, 0.1 mm foil