Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications

• Autorzy: Trenczek-Zając A. , Banaś J. , Świerczek K. , Zazakowny K. , Radecka M.

Identyfikatory

DOI

10.1515/amm-2017-0124

• Języki publikacji: EN

Abstrakty

EN

A TiO₂/CdS coupled system was prepared by mixing the TiO₂ P25 with CdS synthesized by means of the precipitation method. It was found that the specific surface area (SSA) of both components is extremely different and equals 49.5 for TiO₂ and 145.4 m²·g^-1 for CdS. The comparison of particle size distribution and images obtained by means of transmission electron microscopy (TEM) showed agglomeration of nanocomposites. X-ray diffraction (XRD) patterns suggest that CdS crystallizes in a mixture of cubic and hexagonal phases. Optical reflectance spectra revealed a gradual shift of the fundamental absorption edge towards longer wavelengths with increasing CdS molar fraction, which indicates an extension of the absorption spectrum of TiO₂. The photocatalytic activity in UV and UV-vis was tested with the use of methyl orange (MO). The Langmuir–Hinshelwood model described well the photodegradation process of MO. The results showed that the photocatalytic behaviour of the TiO₂/CdS mixture is significantly better than that of pure nanopowders.

Słowa kluczowe

EN

semiconductors; X-ray diffraction; transmission electron microscopy TEM; catalytic properties; optical properties

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 2A
• Strony: 841--849
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Trenczek-Zając A.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Inorganic Chemistry, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Banaś J.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Inorganic Chemistry, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Świerczek K.

• AGH University of Science and Technology, Faculty of Energy and Fuels, Department of Hydrogen Energy, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Zazakowny K.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Inorganic Chemistry, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Radecka M.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Inorganic Chemistry, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).