Size-Controlled Synthesis of Pt Particles on TiO2 Surface : Physicochemical Characteristic and Photocatalytic Activity

Zielińska-Jurek, Anna; Wei, Zhishun; Janczarek, Marcin et al.

Catalysts, 2019, 9(11), 940

Permalink : https://hdl.handle.net/2115/86395

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https://doi.org/10.3390/catal9110940     16

論文情報

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アクセス権
open access
URI
https://hdl.handle.net/2115/86395
タイトル
Size-Controlled Synthesis of Pt Particles on TiO2 Surface : Physicochemical Characteristic and Photocatalytic Activity
著者
Zielińska-Jurek, Anna ; Wei, Zhishun ; Janczarek, Marcin ; Wysocka, Izabela ; Kowalska, Ewa
著者名
Zielińska-Jurek, Anna
著者名
Wei, Zhishun
著者名
Janczarek, Marcin
著者名
Wysocka, Izabela
ORCID
0000-0003-0955-9268
著者名
Kowalska, Ewa
キーワード
Pt-TiO2
heterogeneous photocatalysis
microemulsion
platinum size
TiO2 particle size
titania morphology
発行日
2019-11
出版者
MDPI
収録物名
Catalysts
巻(号)
9(11)
ページ
940
抄録
Different TiO2 photocatalysts, i.e., commercial samples (ST-01 and P25 with minority of rutile phase), nanotubes, well-crystallized faceted particles of decahedral shape and mesoporous spheres, were used as supports for deposition of Pt nanoparticles (NPs). Size-controlled Pt NPs embedded in TiO2 were successfully prepared by microemulsion and wet-impregnation methods. Obtained photocatalysts were characterized using XRD, TEM, X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) specific surface area, DR/UV-vis and action spectrum analysis. The effect of deposition method, amount of Pt precursor and TiO2 properties on size, distribution, and chemical states of deposited Pt NPs were investigated. Finally, the correlations between the physicochemical properties and photocatalytic activities in oxidation and reduction reactions under UV and Vis light of different Pt-TiO2 photocatalysts were discussed. It was found that, regardless of preparation method, the photoactivity mainly depended on platinum and TiO2 morphology. In view of this, we claim that the tight control of NPs’ morphology allows us to design highly active materials with enhanced photocatalytic performance. Action spectrum analysis for the most active Pt-modified TiO2 sample showed that visible light-induced phenol oxidation is initiated by excitation of platinum surface plasmon, and photocatalytic activity analysis revealed that photoactivity depended strongly on morphology of the obtained Pt-modified TiO2 photocatalysts.
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/catal9110940