Synthesis of Y2O2S:Eu3+ luminescent nanobelts via electrospinning combined with sulfurization technique

• Published in: Journal of materials science Vol. 48; no. 2; pp. 644 - 650
• Main Authors: Yang, Liying, Wang, Jinxian, Dong, Xiangting, Liu, Guixia, Yu, Wensheng
• Format: Journal Article
• Language: English
• Published: Boston Springer US 2013; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Charge transfer; Chemistry and Materials Science; Classical Mechanics; Crucibles; Crystallography and Scattering Methods; Electrospinning; Europium; Low temperature; Materials Science; Morphology; Nanocomposites; Nanomaterials; Nanostructure; Polymer Sciences; Rare earth metals; Scanning electron microscopy; Solid Mechanics; Sulfur; Sulfurization; Ultraviolet radiation; Yttrium oxide; Energy Dispersive Spectrometer; Rare Earth Oxide; Y2O3; Sulfur Powder; Oxysulfide
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-012-6768-5

Y 2 O 2 S:Eu 3+ nanobelts were successfully prepared via electrospinning method and sulfurization process using the as-prepared Y 2 O 3 :Eu 3+ nanobelts and sulfur powders as sulfur source by a double-crucible method for the first time. X-ray diffraction analysis indicated that the Y 2 O 2 S:Eu 3+ nanobelts were pure hexagonal in structure with space group P m 1. Scanning electron microscope images showed that the width and thickness of the Y 2 O 2 S:Eu 3+ nanobelts were ca. 6.7 μm and 125 nm, respectively. Under the excitation of 325-nm ultraviolet light, Y 2 O 2 S:Eu 3+ nanobelts exhibited red emissions of predominant peaks at 628 and 618 nm, which are attributed to the 5 D 0  →  7 F 2 transition of the Eu 3+ ions. It was found that the optimum doping concentration of Eu 3+ ions in the Y 2 O 2 S: Eu 3+ nanobelts was 3 %. Compared with bulk particle, Eu 3+ –O 2− /S 2− charge transfer bands (260 and 325 nm) of the Y 2 O 2 S:Eu 3+ nanobelts showed a blue-shift significantly. The formation mechanism of the Y 2 O 2 S: Eu 3+ nanobelts was also proposed. This new sulfurization technique is of great importance, not only to inherit the morphology of rare earth oxides but also to fabricate pure-phase rare earth oxysulfides at low temperature compared with conventional sulfurization method.