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Title:Novel TiO2-supported gold nanoflowers for efficient photocatalytic NOx abatement
Authors:ID Slapničar, Špela (Author)
ID Žerjav, Gregor (Author)
ID Zavašnik, Janez (Author)
ID Roškarič, Matevž (Author)
ID Finšgar, Matjaž (Author)
ID Pintar, Albin (Author)
Files:URL URL - Source URL, visit https://www.mdpi.com/1420-3049/29/14/3333
 
.pdf PDF - Presentation file, download (10,03 MB)
MD5: D7CCFDF2A7C1469AAA2AF1553110FBF2
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo KI - National Institute of Chemistry
Abstract:t: In this study, we pioneered the synthesis of nanoflower-shaped TiO2 -supported Au photocatalysts and investigated their properties. Au nanoflowers (Au NFs) were prepared by a Na-citrate and hydroquinone-based preparation method, followed by wet impregnation of the derived Au NFs on the surface of TiO2 nanorods (TNR). A uniform and homogeneous distribution of Au NFs was observed in the TNR + NF(0.7) sample (lower Na-citrate concentration), while their distribution was heterogeneous in the TNR + NF(1.4) sample (higher Na-citrate concentration). The UV-Vis DR spectra revealed the size- and shape-dependent optical properties of the Au NFs, with the LSPR effect observed in the visible region. The solid-state EPR spectra showed the presence of Ti3+, oxygen vacancies and electron interactions with organic compounds on the catalyst surface. In the case of the TNR + NF(0.7) sample, high photocatalytic activity was observed in the H2 -assisted reduction of NO2 to N2 at room temperature under visible-light illumination. In contrast, the TNR + NF(1.4) catalyst as well as the heat-treated samples showed no ability to reduce NO2 under visible light, indicating the presence of deformed Au NFs limiting the LSPR effect. These results emphasized the importance of the choice of synthesis method, as this could strongly influence the photocatalytic activity of the Au NFs
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2024
Publisher:MDPI
Year of publishing:2024
Number of pages:str. 1-26
Numbering:Vol. 29, [article no.] 3333
Source:Molecules
PID:20.500.12556/DiRROS-19794 New window
UDC:544.3/.4
ISSN on article:1420-3049
DOI:10.3390/molecules29143333 New window
COBISS.SI-ID:202304771 New window
Copyright:© 2024 by the authors
Note:Nasl. z nasl. zaslona; Opis vira z dne 22. 7. 2024;
Publication date in DiRROS:25.07.2024
Views:526
Downloads:366
Metadata:XML DC-XML DC-RDF
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SLAPNIČAR, Špela, ŽERJAV, Gregor, ZAVAŠNIK, Janez, ROŠKARIČ, Matevž, FINŠGAR, Matjaž and PINTAR, Albin, 2024, Novel TiO2-supported gold nanoflowers for efficient photocatalytic NOx abatement. Molecules [online]. 2024. Vol. 29, no. 3333, p. 1–26. [Accessed 16 April 2025]. DOI 10.3390/molecules29143333. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=19794
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Record is a part of a journal

Title:Molecules
Shortened title:Molecules
Publisher:MDPI
ISSN:1420-3049
COBISS.SI-ID:18462981 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0150
Name:Integralni pristop k preprečevanju onesnaževanja voda
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0118
Name:Tekstilna kemija in napredni tekstilni materiali
Funder:Other - Other funder or multiple funders
Funding programme:Ministry of Education, Science, and Sport of the Republic of Slovenia
Funder:EC - European Commission
Funding programme:European Regional Development Fund

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:kataliza, fotokataliza, titanov dioksid, svetloba, impregnacija


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