Detail publikace
Platinum single atoms on titania aid dye photodegradation whereas platinum nanoparticles do not
Pecoraro, CM. Sopha, H. Wu, SM. Kim, H. Wang, Y. Macak, J. Santamaria, M. Schmuki, P.
Originální název
Platinum single atoms on titania aid dye photodegradation whereas platinum nanoparticles do not
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The photocatalytic degradation of unwanted organic species has been investigated for decades using modified and non-modified titania nanostructures. In the present study, we investigate the co-catalytic effect of single atoms (SAs) of Pt and Pt nanoparticles on titania substrates on the degradation of the two typical photodegradation model pollutants: Acid Orange 7 (AO7) and Rhodamine B (RhB). For this, we use highly defined sputter deposited anatase layers and load them with Pt SAs at different loading densities or alternatively with Pt nanoparticles. We find that the Pt SAs have strong accelerating effects (already for a low loading density of similar to 105 SAs mu m-2) on the photodegradation of AO7, whereas Pt nanoparticles do hardly have an effect on the decay kinetics. The main beneficial effect of SA Pt is facilitated superoxide formation, which for SAs is significantly enhanced. Overall, the work demonstrates that Pt SA co-catalysts can have a beneficial effect not only for the well-studied use of H2 generation, but also in the photocatalytic degradation of pollutants-this is particularly the case if the degradation is dominated by a conduction band electron transfer to dissolved O2 in the solution.
Klíčová slova
ACID ORANGE 7; PHOTOCATALYTIC DEGRADATION; TIO2; WATER; OXYGEN
Autoři
Pecoraro, CM.; Sopha, H.; Wu, SM.; Kim, H.; Wang, Y.; Macak, J.; Santamaria, M.; Schmuki, P.
Vydáno
13. 2. 2025
Nakladatel
ROYAL SOC CHEMISTRY
Místo
CAMBRIDGE
ISSN
2040-3372
Periodikum
Nanoscale
Ročník
17
Číslo
7
Stát
Spojené království Velké Británie a Severního Irska
Strany od
3949
Strany do
3957
Strany počet
9
URL
BibTex
@article{BUT197911,
author="Jan {Macák} and Patrik {Schmuki} and Hanna Ingrid {Sopha} and Claudio Maria {Pecoraro} and Siming {Wu} and Hyesung {Kim} and Yue {Wang} and Monica {Santamaria}",
title="Platinum single atoms on titania aid dye photodegradation whereas platinum nanoparticles do not",
journal="Nanoscale",
year="2025",
volume="17",
number="7",
pages="3949--3957",
doi="10.1039/d4nr02450h",
issn="2040-3372",
url="https://pubs.rsc.org/en/content/articlelanding/2025/nr/d4nr02450h"
}