| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Bajorowicz, Beata
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2018Preparation of CdS and Bi2S3 quantum dots co-decorated perovskite-type KNbO3 ternary heterostructure with improved visible light photocatalytic activity and stability for phenol degradationcitations
- 2017Preparation and photocatalytic properties of BaZrO3 and SrZrO3 modified with Cu2O/Bi2O3 quantum dotscitations
- 2017The effects of bifunctional linker and reflux time on the surface properties and photocatalytic activity of CdTe quantum dots decorated KTaO3 composite photocatalystscitations
Places of action
| Organizations | Location | People |
|---|
article
Preparation of CdS and Bi2S3 quantum dots co-decorated perovskite-type KNbO3 ternary heterostructure with improved visible light photocatalytic activity and stability for phenol degradation
Abstract
CdS quantum dot-decorated KNbO3 composite photocatalysts co-modified with Bi2S3 QDs weredesigned and synthesized by a combination of the hydrothermal method with a linker-assisted adsorptionroute, using starch and thioglycolic acid as capping agents, which facilitated the attachment of modifiersto the surface of potassium niobate. The quantum dots were successfully deposited onto the surface ofthe perovskite-type KNbO3 with a good dispersion and a stable heterostructure was formed. The as-preparedphotocatalysts were subsequently characterized by UV-Vis diffuse reflectance spectroscopy (DRS),X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning transmission electron microscopy(STEM), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET) specific surfacearea, X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) emission spectroscopy. Theobtained KNbO3-based composites showed greatly improved photocatalytic performance for the degradationof phenol in the aqueous phase under visible light irradiation (λ > 420 nm) over pristine KNbO3.The highest photocatalytic performance and enhanced stability were observed for the ternary 30% CdS–5%Bi2S3 quantum dot-decorated KNbO3 composite, which could be related to the enhanced visible-lightabsorption ability, efficient charge separation in the three-level electron transfer heterojunction, improvedstability and appropriate amounts of composite components. The formation of a surface layer of CdOdecreased the visible light photoactivity of the CdS QD-decorated KNbO3 photocatalysts. The mainphenol oxidation intermediates were benzoquinone, catechol, hydroquinone, and 1,2,4-benzenetriol,which underwent further photooxidation to form non-cyclic organic acids. Action spectral analysisproved the better photocatalytic activity of the ternary CdS/B2S3 QDs co-decorated KNbO3 compositecompared to the binary CdS QDs decorated KNbO3 sample and revealed that irradiation ranging from420 to 520 nm was responsible for the visible light photoactivity.