- Tytuł:
- Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications
- Autorzy:
-
Trenczek-Zając, A.
Banaś, J.
Świerczek, K.
Zazakowny, K.
Radecka, M. - Powiązania:
- https://bibliotekanauki.pl/articles/352507.pdf
- Data publikacji:
- 2017
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
semiconductors
X-ray diffraction
transmission electron microscopy TEM
catalytic properties
optical properties - Opis:
- 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.
- Źródło:
-
Archives of Metallurgy and Materials; 2017, 62, 2A; 841-849
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł