Next Article in Journal
A Zn-Doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite Cathode with Enhanced ORR Catalytic Activity for SOFCs
Previous Article in Journal
Enhanced Photocatalytic Activity of Au/TiO2 Nanoparticles against Ciprofloxacin
Previous Article in Special Issue
Photocatalytic Degradation of Different VOCs in the Gas-Phase over TiO2 Thin Films Prepared by Ultrasonic Spray Pyrolysis
Open AccessArticle

Enhanced UV Light Emission by Core-Shell Upconverting Particles Powering up TiO2 Photocatalysis in Near-Infrared Light

Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(2), 232; https://doi.org/10.3390/catal10020232
Received: 12 January 2020 / Revised: 12 February 2020 / Accepted: 13 February 2020 / Published: 15 February 2020
The core-shell NaYb0.99F4:Tm0.01@NaYF4 upconverting particles (UCPs) with a high UV emission to apply in NIR-driven photocatalysis were synthesized. The influence of the Yb3+ doping concentration in NaYxF4:Yb0.99−xTm0.01 core particles, and the role of the NaYF4 shell on the upconversion emission intensity of the UCPs were studied. The absorption of NIR light by the obtained UCPs was maximized by increasing the Yb3+ concentration in the core, reaching the maximum for Y3+-free particles (NaYb0.99F4:Tm0.01). Additionally, covering the NaYb0.99F4:Tm0.01 core with a protective layer of NaYF4 minimized the surface luminescence quenching, which significantly improved the efficiency of upconversion emission. The high intensity of the UV light emitted by the NaYb0.99F4:Tm0.01@NaYF4 under NIR irradiation resulted in a high photocatalytic activity of TiO2 (P25) mixed with the synthesized material. View Full-Text
Keywords: photocatalysis; upconversion; near-infrared (NIR); lanthanides; TiO2 photocatalysis; upconversion; near-infrared (NIR); lanthanides; TiO2
Show Figures

Figure 1

MDPI and ACS Style

Jarosz-Duda, A.; O’Callaghan, P.; Kuncewicz, J.; Łabuz, P.; Macyk, W. Enhanced UV Light Emission by Core-Shell Upconverting Particles Powering up TiO2 Photocatalysis in Near-Infrared Light. Catalysts 2020, 10, 232.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop