Gregor Žerjav (Author), Zafer Say (Author), Janez Zavašnik (Author), Matjaž Finšgar (Author), Christoph Langhammer (Author), Albin Pintar (Author)

Abstract

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.

Keywords

heterogeneous photocatalysis;titanium dioxide;plasmonic noble metal;platinum particles;visible light illumination;Schottky barrier height;bisphenol A;wastewater treatment;NOx abatement;air cleaning;microreactor;thermal catalysis;photothermal catalysis;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: IJS - Jožef Stefan Institute
Publisher: Elsevier B.V.
UDC: 544.3/.4
COBISS: 153849603 Link will open in a new window
ISSN: 2213-3437
Views: 8
Downloads: 2
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Other data

Secondary language: Slovenian
Secondary keywords: heterogena fotokataliza;titanov dioksid;delci platine;bisfenol A;višina Schottkyjeve bariere;obdelava odpadnih voda;čiščenje zraka;mikroreaktor;termalna kataliza;fototermalna kataliza;
Source comment: Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Janez Zavašnik, Matjaž Finšgar, Albin Pintar; Opis vira z dne 30. 5. 2023;
Pages: str. 1-12
Volume: ǂVol. ǂ11
Issue: ǂiss. ǂ3, [article no.] 110209
Chronology: Jun. 2023
DOI: 10.1016/j.jece.2023.110209
ID: 19366063