Facet-dependent photocatalysts design towards efficient water treatment

Proposed project is focused on increasing activity of the photocatalysts utilized in the water treatment technology. A series of photocatalysts exposed with specific crystal facets will be prepared and systematically modified, in order to achieve possibly high photocatalytic activity. It is expected that combination of a specific crystal facet exposed, introduced dopants and surface co-catalysts should remarkable increase photocatalyst quantum efficiency. Furthermore, obtained materials will be tested towards their ability to generate different reactive oxygen species which should initiate degradation process. Finally, characterized materials will be tested in the removal of selected different pollutants from aqueous phase (pharmaceuticals, pesticides, heavy metals and PAHs). Obtained results should provide key information about design of the highly active, multi-component photocatalytic systems, as well as they will act as a base for further studies and/or applications made by the PG's photocatalysis team.

Details

Financial Program Name:: PRELUDIUM
Organization:: Narodowe Centrum Nauki (NCN) (National Science Centre)
Agreement:: UMO-2021/41/N/ST5/03447 z dnia 2021-11-26
Realisation period:: 2021-11-26 - 2024-11-25
Project manager:: dr inż. Szymon Dudziak
Realised in:: Department of Process Engineering and Chemical Technology
Project's value:: 232 500.00 PLN
Request type:: National Research Programmes
Domestic:: Domestic project
Verified by:: Gdańsk University of Technology

Papers associated with that project

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total: 2

Year 2024

Fine-Tuning the Photocatalytic Activity of the Anatase {1 0 1} Facet through Dopant-Controlled Reduction of the Spontaneously Present Donor State Density
Publication
- S. Dudziak
- J. Karczewski
- A. Ostrowski
- G. Trykowski
- K. Nikiforow
- A. Zielińska-Jurek
- ACS Materials Au - Year 2024
The present study highlights the importance of the net density of charge carriers at the ground state on photocatalytic activity of the faceted particles, which can be seen as a highly underexplored problem. To investigate it in detail, we have systematically doped {1 0 1} enclosed anatase nanoparticles with Gd3+ ions to manipulate the charge carrier concentration. Furthermore, control experiments using an analogical Nb5+ doped...

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Year 2023

The interplay between dopant and a surface structure of the photocatalyst – The case study of Nb-doped faceted TiO2
Publication
- S. Dudziak
- E. Kowalska
- K. Wang
- J. Karczewski
- M. Sawczak
- B. Ohtani
- A. Zielińska-Jurek
- APPLIED CATALYSIS B-ENVIRONMENTAL - Year 2023
Anatase nanoparticles, exposing the majority of the {0 0 1}, {1 0 0} and {1 0 1} facets were synthesized and doped with different niobium amount to investigate the self-trapping of the excess electrons and resulting photocatalytic activity. Photocatalyst structure and presence of excess electrons inside the obtained Nb-doped anatase samples was confirmed by the combination of structural and spectroscopic analyses. Only for the...

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