Issue 5, 2018

Recyclable (Fe3O4-NaYF4:Yb,Tm)@TiO2 nanocomposites with near-infrared enhanced photocatalytic activity

Abstract

Herein, the design and synthesis of a multifunctional (Fe3O4-NaYF4:Yb,Tm)@TiO2 photocatalyst through a facile sol–gel process combined with electrostatic self-assembly has been reported. Particularly, as an upconversion sensor, NaYF4:Yb,Tm nanoparticles have the ability to convert near-infrared (NIR) light into ultraviolet (UV) emissions, so that the catalytic body TiO2 can indirectly utilize the NIR part of sunlight but not UV light. The excellent photocatalytic activity of the hybrid samples is evaluated using a model of the degradation of methylene blue (MB). Most importantly, the obtained materials exhibit remarkable magnetic properties because of the addition of a magnetic component (Fe3O4), therefore, the photocatalysts possess desired recyclability and reusability, which is significant for actual applications. Finally, the possible photocatalysis mechanism of the nanohybrids is discussed and hydroxyl radicals (OH˙) are confirmed as the main reactive species.

Graphical abstract: Recyclable (Fe3O4-NaYF4:Yb,Tm)@TiO2 nanocomposites with near-infrared enhanced photocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
13 Nov 2017
Accepted
19 Dec 2017
First published
20 Dec 2017

Dalton Trans., 2018,47, 1666-1673

Recyclable (Fe3O4-NaYF4:Yb,Tm)@TiO2 nanocomposites with near-infrared enhanced photocatalytic activity

Y. Lv, L. Yue, Q. Li, B. Shao, S. Zhao, H. Wang, S. Wu and Z. Wang, Dalton Trans., 2018, 47, 1666 DOI: 10.1039/C7DT04279E

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