Surface properties and photocatalytic activity of KTaO3, CdS, MoS2 semiconductors and their binary and ternary semiconductor composites
PBN-AR
Instytucja
Wydział Fizyki Technicznej i Matematyki Stosowanej (Politechnika Gdańska)
Informacje podstawowe
Główny język publikacji
ENG
Czasopismo
MOLECULES
ISSN
1420-3049
EISSN
Wydawca
DOI
URL
Rok publikacji
2014
Numer zeszytu
9
Strony od-do
1-22
Numer tomu
19
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
COMPOSITES
PHOTOCATALYSIS
POLLUTANT DEGRADATION
SEMICONDUCTORS
Streszczenia
Język
Treść
Single semiconductors such as KTaO3, CdS MoS2 or their precursor solutions were combined to form novel binary and ternary semiconductor nanocomposites by the calcination or by the hydro/solvothermal mixed solutions methods, respectively. The aim of this work was to study the influence of preparation method as well as type and amount of the composite components on the surface properties and photocatalytic activity of the new semiconducting photoactive materials. We presented different binary and ternary combinations of the above semiconductors for phenol and toluene photocatalytic degradation and characterized by X-ray powder diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) specific surface area and porosity. The results showed that loading MoS2 onto CdS as well as loading CdS onto KTaO3 significantly enhanced absorption properties as compared with single semiconductors. The highest photocatalytic activity in phenol degradation reaction under both UV-Vis and visible light irradiation and very good stability in toluene removal was observed for ternary hybrid obtained by calcination of KTaO3, CdS, MoS2 powders at the 10:5:1 molar ratio. Enhanced photoactivity could be related to the two-photon excitation in KTaO3-CdS-MoS2 composite under UV-Vis and/or to additional presence of CdMoO4 working as co-catalyst.
Inne
System-identifier
128587