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β-NaYF4:Yb,Er,Gd Nanorods@1T/2H-MoS2 for 980 nm NIR-Triggered Photocatalytic Bactericidal Properties

Abstract

Herein, a β-NaYF4:Yb,Er,Gd nanorods@1T/2H-MoS2 nanocomposite was firstly fabricated and used to photocatalytic sterilization under a single near-infrared (NIR) light illumination. About 99.3% of Escherichia coli can be killed effectively by 15 min irradiation of NIR light at a dose of 40 μg/mL. The good bactericidal activities are ascribed to the high upconversion fluorescence efficiency of β-NaYF4:Yb,Er,Gd and the layered 2D nanosheets structure of 1T/2H-MoS2. Under 980 nm light irradiation, β-NaYF4:Yb,Er,Gd emits visible light which is absorbed by MoS2 producing strongly oxidative holes and reductive electrons, and photogenerated electron-hole pairs could react with H2O, O2 and OH- to produce reactive species in aqueous solution. These reactive species are strong nonselective oxidizing agents for sterilization.

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Supplementary files

Article information


Submitted
21 Feb 2020
Accepted
24 Jun 2020
First published
28 Jun 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

β-NaYF4:Yb,Er,Gd Nanorods@1T/2H-MoS2 for 980 nm NIR-Triggered Photocatalytic Bactericidal Properties

Y. Qiao, X. Zhou, H. Geng, L. Sun, D. Zhen and Q. Cai, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ00908C

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