Photo, thermal and photothermal activity of TiO2 supported Pt catalysts for plasmon-driven environmental applications
Artikel i vetenskaplig tidskrift, 2023

TiO2+Pt plasmonic solids with 1 wt% Pt and different TiO2 supports (anatase nanoparticles (TNP), polycrystalline nanorods (a-TNR) and single-crystal anatase nanorods (TNR)) were synthesized using the wet impregnation technique and tested as photo, thermal and photothermal catalysts in gas-solid and gas-liquid-solid reactions. Due to the different charges of the TiO2 support surfaces, Pt particles with different sizes, crystallinities and degrees of interaction with the TiO2 supports were formed during the synthesis. The heights of the Schottky barrier (SBH) were 0.38 eV for the a-TNR+Pt, 0.41 eV for the TNP+Pt, and 0.50 eV for the TNR+Pt samples, respectively. The low visible-light-triggered photocatalytic activity of the TNR+Pt catalyst toward the oxidation of water-dissolved bisphenol A (BPA) is attributed to its high SBH and active site deactivation due to the adsorption of BPA and/or BPA oxidation products. The highest photothermal catalytic H2-assisted NO2 reduction rate was expressed by the TNR+Pt catalyst. This can be ascribed to the presence of a narrow particle size distribution of small Pt particles, the absence of the Pt catalysed reduction of the TNR support at higher temperatures, and the lower rate of re-injection of “hot electrons” from the TNR support to the Pt particles.

Air cleaning

Bisphenol A

Wastewater treatment

NO abatement x

H -deNO 2 x

Plasmonic noble metal

Photothermal catalysis

Heterogeneous photocatalysis

Thermal catalysis

Visible-light illumination


TiO 2

Schottky barrier height

Pt particles


Gregor Žerjav

Kemijski Inštitut

Zafer Say

Chalmers, Fysik, Kemisk fysik

Janez Zavašnik

Institut Jožef Stefan

Matjaž Finšgar

Univerza v Mariboru

Christoph Langhammer

Chalmers, Fysik, Kemisk fysik

Albin Pintar

Kemijski Inštitut

Journal of Environmental Chemical Engineering

2213-2929 (ISSN) 2213-3437 (eISSN)

Vol. 11 3 110209


Kemiska processer



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