Novel CdTe-KTaO3composite photocatalysts were successfully synthesized by using thioglycolic acid(TGA) or 3-mercaptopropionic acid (MPA) as linker molecules which facilitated attachment of CdTequantum dots to the surface of KTaO3nanocubes. The as-prepared photocatalysts were characterizedby UV–vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), scanning electron microscopy(SEM), transmission electron microscopy (TEM) with energy dispersive X-ray analysis (EDX), Fouriertransform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET) specific surface area, X-rayphotoelectron spectroscopy (XPS) and photoluminescence (PL) emission spectroscopy. The obtainedCdTe-decorated KTaO3composites showed greatly improved photocatalytic performance for degra-dation of toluene in the gas phase under LEDs light irradiation (max= 415 nm) over pristine KTaO3.TGA-functionalized CdTe-KTaO3composites exhibited higher photocatalytic activity as compared withMPA-capped CdTe-KTaO3hybrids which can be ascribed to the shorter chain length of TGA moleculeas compared with MPA linker and therefore faster electron transfer from TGA-CdTe nanodots toperovskite-type potassium tantalate. The significance of quantum size effect of CdTe QDs for enhancingphotocatalytic performance of CdTeQDs-decorated KTaO3was also discussed.
Authors
- Beata Bajorowicz,
- Joanna Nadolna,
- Wojciech Lisowski,
- prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
- Adriana Zaleska-Medynska
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.apcatb.2016.10.027
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2017
