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Photoinduced electron transfer and photodegradation of malonic acid at Au/TiO2 investigated by in situ ATR-IR spectroscopy

TiO2 coated Au nanoparticles were synthesized and characterized by TEM, XPS and XRD. It was found that the Au nanoparticles were coated with TiO2 thus forming a core-shell structure. Electron transfer, adsorption and photodegradation of malonic acid on the catalyst were investigated by in situ atten...

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Hauptverfasser: Hu, Xuefeng (VerfasserIn) , Bürgi, Thomas (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 27 December 2012
In: Applied catalysis. A, General
Year: 2012, Jahrgang: 449, Pages: 139-144
ISSN:1873-3875
DOI:10.1016/j.apcata.2012.09.017
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1016/j.apcata.2012.09.017
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0926860X12006102
Volltext
Verfasserangaben:Xuefeng Hu, Thomas Bürgi
Beschreibung
Zusammenfassung:TiO2 coated Au nanoparticles were synthesized and characterized by TEM, XPS and XRD. It was found that the Au nanoparticles were coated with TiO2 thus forming a core-shell structure. Electron transfer, adsorption and photodegradation of malonic acid on the catalyst were investigated by in situ attenuated total reflection infrared (ATR-IR) spectroscopy. Malonic acid adsorbed and underwent photodegradation efficiently in air and nitrogen atmosphere under UV light illumination on the prepared catalyst. As intermediate species oxalate was observed on the catalyst surface during the photodegradation of malonic acid. The Au nanoparticles accelerate the degradation of malonic acid by capturing the conduction band electrons of TiO2. The ATR spectra also reveal interface electron transfer from Au nanoparticles to TiO2 under visible light illumination and from TiO2 to Au nanoparticles under UV illumination.
Beschreibung:Die Zahl 2 ist im Titel tiefgestellt
Gesehen am 07.11.2018
Beschreibung:Online Resource
ISSN:1873-3875
DOI:10.1016/j.apcata.2012.09.017

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