Theoretical and Experimental Studies on the Visible Light Activity of TiO2 Modified with Halide-Based Ionic Liquids

Paszkiewicz-Gawron, Marta; Makurat, Samanta; Rak, Janusz et al.

Catalysts, 2020, 10(4), 371

Permalink : https://hdl.handle.net/2115/86397

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https://doi.org/10.3390/catal10040371     33

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アクセス権
open access
URI
https://hdl.handle.net/2115/86397
タイトル
Theoretical and Experimental Studies on the Visible Light Activity of TiO2 Modified with Halide-Based Ionic Liquids
著者
Paszkiewicz-Gawron, Marta ; Makurat, Samanta ; Rak, Janusz ; Zdrowowicz, Magdalena ; Lisowski, Wojciech ; Zaleska-Medynska, Adriana ; Kowalska, Ewa ; Mazierski, Paweł ; Łuczak, Justyna
著者名
Paszkiewicz-Gawron, Marta
著者名
Makurat, Samanta
著者名
Rak, Janusz
著者名
Zdrowowicz, Magdalena
著者名
Lisowski, Wojciech
著者名
Zaleska-Medynska, Adriana
ORCID
0000-0003-0955-9268
著者名
Kowalska, Ewa
著者名
Mazierski, Paweł
著者名
Łuczak, Justyna
キーワード
ionic liquids
apparent quantum efficiency
photocatalysis
DFT model
titanium dioxide
anions
発行日
2020-04
出版者
MDPI
収録物名
Catalysts
巻(号)
10(4)
ページ
371
抄録
Formation of a surface complex between organic molecules and TiO2 is one of the possible strategies for the development of visible light-induced TiO2 photoactivity. Herein, three ionic liquids (ILs) with the same cation and different anions (1-butylpirydynium chloride/bromide/iodide) have been applied for the surface modification of TiO2 and to understand the role of anions in visible light-induced activity of ILs-TiO2 systems. Photocatalytic screening tests (the measurements of phenol photodegradation reaction rate) revealed that anion type affected visible light activity (λ > 420 nm) of TiO2 obtained by the ILs-assisted solvothermal method. Density functional theory (DFT) calculations demonstrated that interactions between halogen anions and oxygen vacancies (OV) on the surface of the TiO2 particles could be responsible for the specific wavelength-induced excitation and finally for the observed photoactivity of titania under visible light. Finally, our theoretical calculations have been proven by experiments using monochromatic light (the apparent quantum efficiency was measured) and the properties of obtained samples were characterized using scanning electron microscopy (SEM), X-ray powder diffraction analysis (XRD), UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS).
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
EISSN
2073-4344
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.3390/catal10040371