A Novel Scheme to Obtain Y2O2S:Er3+ Upconversion Luminescent Hollow Nanofibers via Precursor Templating. Issue 9 (19th June 2015)

• Record Type: Journal Article
• Authors: Han, Lei; Pan, Mengmeng; Hu, Yanhua; Xie, Yangfan; Liu, Yangyang; Li, Dan; Dong, Xiangting; Ballato, J.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 9(2015)
• Page Start: 2817
• Page End: 2822
• Publication Date: 2015-06-19
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13696
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13696-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Y<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup> hollow nanofibers were prepared by calcination of the monoaxial electrospinning‐derived PVP/[Y(NO<sub>3</sub>)<sub>3</sub>+Er(NO<sub>3</sub>)<sub>3</sub>] composite nanofibers, and then Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers were synthesized by sulfurization of the as‐obtained Y<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup> hollow nanofibers via a double‐crucible method using sulfur powders as sulfur source. X‐ray diffraction (XRD) analysis shows that the Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers are pure hexagonal phase with the space group of <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2xzcft0r" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:00027820:media:jace13696:jace13696-math-0001" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>P</mml:mi><mml:mover accent="true"><mml:mrow><mml:mn mathvariant="bold">3</mml:mn></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mrow><mml:mi mathvariant="bold-italic">m</mml:mi></mml:mrow><mml:mn mathvariant="bold">1</mml:mn></mml:mrow></mml:math></alternatives></inline-formula>. Scanning electron microscope (SEM) observation indicates that the Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers are obvious hollow‐centered with the outer diameter of 176 ± 25 nm. Upconversion emission spectrum analysis manifests that Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers emit strong green and weak red upconversion emissions centering at 526, 546, and 667 nm, respectively. The green emissions and the red emission are, respectively, originated from <sup>2</sup>H<sub>11/2</sub>/<sup>4</sup>S<sub>3/2</sub>→<sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>F<sub>9/2</sub>→<sup>4</sup>I<sub>l5/2</sub> energy levels transitions of the Er<sup>3+</sup> ions. The emitting colors of Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers are located in the green region in CIE chromaticity coordinates diagram. The formation mechanism of the Y<sub>2</sub>O<sub>2</sub>S:Er<sup>3+</sup> hollow nanofibers is also advanced. This preparation technique can be applied to prepare other rare‐earth oxysulfides hollow nanofibers.</p> </abstract>