Au/Ti synergistically modified supports based on SiO.sub.2./sub. with different pore geometries and architectures

0562808 - FZÚ 2023 RIV CH eng J - Journal Article
Petcu, G. - Anghel, E.M. - Buixaderas, Elena - Atkinson, I. - Somacescu, S. - Baran, A. - Culita, D.C. - Trica, B. - Bradu, C. - Ciobanu, M. - Parvulescu, V.
Au/Ti synergistically modified supports based on SiO₂ with different pore geometries and architectures.
Catalysts. Roč. 12, č. 10 (2022), č. článku 1129. E-ISSN 2073-4344
Institutional support: RVO:68378271
Keywords : hierarchical zeolite Y * 3D mesoporous silica * Au/Ti-supported catalysts * surface plasmon resonance effect * photocatalytic degradation
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.9, year: 2022
Method of publishing: Open access

New photocatalysts were obtained by immobilization of titanium and gold species on zeolite Y, hierarchical zeolite Y, MCM-48 and KIT-6 supports with microporous, hierarchical and mesoporous cubic structure. The obtained samples were characterized by X-ray diffraction (XRD), N2-physisorption, scanning and transmission electron microscopy (SEM/TEM), diffuse reflectance UV–Vis spectroscopy (DRUV-Vis), X-ray photoelectron spectroscopy (XPS), Raman and photoluminescence spectroscopy. The photocatalytic properties were evaluated in degradation of amoxicillin (AMX) from water, under UV (254 nm) and visible light (532 nm) irradiation. The higher degradation efficiency and best apparent rate constant were obtained under UV irradiation for Au-TiO2-KIT-6, while in the visible condition for the Au-TiO2-MCM-48 sample containing anatase, rutile and the greatest percent of Au metallic clusters were found (evidenced by XPS).
Permanent Link: https://hdl.handle.net/11104/0335001