Fabrication of ILs-Assisted AgTaO3 Nanoparticles for the Water Splitting Reaction: The Effect of ILs on Morphology and Photoactivity

Julia Zwara; Anna Pancielejko; Marta Paszkiewicz-Gawron; Justyna Łuczak; Magdalena Miodynska; Wojciech Lisowski; Adriana Zaleska-Medynska; Ewelina Grabowska-Musiał

doi:10.3390/ma13184055

Fabrication of ILs-Assisted AgTaO3 Nanoparticles for the Water Splitting Reaction: The Effect of ILs on Morphology and Photoactivity

Abstract

The design of an active, stable and ecient photocatalyst that is able to be used for hydrogen production is of great interest nowadays. Therefore, four methods of AgTaO3 perovskite synthesis, such as hydrothermal, solvothermal, sol-gel and solid state reactions, were proposed in this study to identify the one with the highest hydrogen generation eciency by the water splitting reaction. The comprehensive results clearly show that the solid state reaction (SSR) led to the obtainment of a sample with an almost seven times higher photocatalytic activity than the other methods. Furthermore, four ionic liquids, all possessing nitrogen in the form of organic cations (two imidazoliums with dierent anions, ammonium and tetrazolium), were used for the first time to prepare composites consisting of AgTaO3 modified with IL and Pt, simultaneously. The eect of the ionic liquids (ILs) and Pt nanoparticles’ presence on the structure, morphology, optical properties, elemental composition and the eectiveness of the hydrogen generation was investigated and discussed. The morphology investigation revealed that the AgTaO3 photocatalysts with the application of [OMIM]-cation based ILs created smaller granules (<500 nm), whereas [TBA] [Cl] and [TPTZ] [Cl] ILs caused the formation of larger particles (up to 2 m). We found that various ILs used for the synthesis did not improve the photocatalytic activity of the obtained samples in comparison with pristine AgTaO3. It was detected that the compound with the highest ability for hydrogen generation under UV-Vis irradiation was the AgTaO3_0.2% Pt (248.5 molg1), having an almost 13 times higher eciency in comparison with the non-modified pristine sample. It is evidenced that the enhanced photocatalytic activity of modified composites originated mainly from the presence of the platinum particles. The mechanism of photocatalytic H2 production under UV-Vis light irradiation in the presence of an AgTaO3_IL_Pt composite in the water splitting reaction was also proposed.

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Authors (8)

Julia Zwara
Anna Pancielejko
Marta Paszkiewicz-Gawron dr inż.
Justyna Łuczak dr hab. inż.
Magdalena Miodynska
Wojciech Lisowski dr hab.
Adriana Zaleska-Medynska prof. dr hab.
Ewelina Grabowska-Musiał dr inż.

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Articles

Type:

artykuły w czasopismach

Published in:

Materials no. 13,
ISSN: 1996-1944

Language:

English

Publication year:

2020

Bibliographic description:

Zwara J., Pancielejko A., Paszkiewicz-Gawron M., Łuczak J., Miodynska M., Lisowski W., Zaleska-Medynska A., Grabowska-Musiał E.: Fabrication of ILs-Assisted AgTaO3 Nanoparticles for the Water Splitting Reaction: The Effect of ILs on Morphology and Photoactivity// Materials -Vol. 13,iss. 18 (2020), s.4055-

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