UV-Vis-Induced Degradation of Phenol over Magnetic Photocatalysts Modified with Pt, Pd, Cu and Au Nanoparticles

Wysocka, Izabela; Kowalska, Ewa; Trzciński, Konrad; Łapiński, Marcin; Nowaczyk, Grzegorz; Zielińska-Jurek, Anna

UV-Vis-Induced Degradation of Phenol over Magnetic Photocatalysts Modified with Pt, Pd, Cu and Au Nanoparticles

Wysocka, Izabela; Kowalska, Ewa; Trzciński, Konrad et al.

Nanomaterials, 2018, 8(1), 28

Permalink : https://hdl.handle.net/2115/86406

このアイテムのアクセス数:237件（2026-08-08 06:40 集計）

閲覧可能ファイル

ファイル	フォーマット	サイズ	閲覧回数	説明
https://doi.org/10.3390/nano8010028			49

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

アクセス権	open access
URI	https://hdl.handle.net/2115/86406
タイトル	UV-Vis-Induced Degradation of Phenol over Magnetic Photocatalysts Modified with Pt, Pd, Cu and Au Nanoparticles
著者	Wysocka, Izabela ; Kowalska, Ewa ; Trzciński, Konrad ; Łapiński, Marcin ; Nowaczyk, Grzegorz ; Zielińska-Jurek, Anna
著者名 Wysocka, Izabela
ORCID 0000-0003-0955-9268 著者名 Kowalska, Ewa
著者名 Trzciński, Konrad
著者名 Łapiński, Marcin
著者名 Nowaczyk, Grzegorz
著者名 Zielińska-Jurek, Anna
キーワード	heterogeneous photocatalysis
	magnetic photocatalysts
	modification of titanium(IV) oxide
	mechanism of degradation
	noble metal nanoparticles
	phenol
発行日	2018-01
出版者	MDPI
収録物名	Nanomaterials
巻(号)	8(1)
ページ	28
抄録	The combination of TiO2 photocatalyst and magnetic oxide nanoparticles enhances the separation and recoverable properties of nanosized TiO2 photocatalyst. Metal-modified (Me = Pd, Au, Pt, Cu) TiO2/SiO2@Fe3O4 nanocomposites were prepared by an ultrasonic-assisted sol-gel method. All prepared samples were characterized by X-ray powder diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET) method, X-ray photoelectron spectroscopy (XPS), scanning transmission electron microscopy (STEM), Mott-Schottky analysis and photoluminescence spectroscopy (PL). Phenol oxidation pathways of magnetic photocatalysts modified with Pt, Pd, Cu and Au nanoparticles proceeded by generation of reactive oxygen species, which oxidized phenol to benzoquinone, hydroquinone and catechol. Benzoquinone and maleic acid were products, which were determined in the hydroquinone oxidation pathway. The highest mineralization rate was observed for Pd-TiO2/SiO2@Fe3O4 and Cu-TiO2/SiO2@Fe3O4 photocatalysts, which produced the highest concentration of catechol during photocatalytic reaction. For Pt-TiO2/SiO2@Fe3O4 nanocomposite, a lack of catechol after 60 min of irradiation resulted in low mineralization rate (CO2 formation). It is proposed that the enhanced photocatalytic activity of palladium and copper-modified photocatalysts is related to an increase in the amount of adsorption sites and efficient charge carrier separation, whereas the keto-enol tautomeric equilibrium retards the rate of phenol photomineralization on Au-TiO2/SiO2@Fe3O4. The magnetization hysteresis loop indicated that the obtained hybrid photocatalyst showed magnetic properties and therefore could be easily separated after treatment process.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
EISSN	2079-4991
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/nano8010028