Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Composite Photocatalysts with Fe, Co, Ni Oxides on Supports with Tetracoordinated Ti Embedded into Aluminosilicate Gel during Zeolite Y Synthesis

Gabriela Petcu
* ,
Elena Maria Anghel
ORCID logo ,
Irina Atkinson
,
Daniela C. Culita
,
Nicoleta G. Apostol
ORCID logo ,
Andrei Kuncser
ORCID logo ,
Florica Papa
ORCID logo ,
Adriana Băran
,
Jean-Luc Blin
ORCID logo ,
Viorica Parvulescu
*
Version 1 : Received: 5 December 2023 / Approved: 6 December 2023 / Online: 7 December 2023 (09:29:37 CET)

A peer-reviewed article of this Preprint also exists.

Petcu, G.; Anghel, E.M.; Atkinson, I.; Culita, D.C.; Apostol, N.G.; Kuncser, A.; Papa, F.; Baran, A.; Blin, J.-L.; Parvulescu, V. Composite Photocatalysts with Fe, Co, and Ni Oxides on Supports with Tetracoordinated Ti Embedded into Aluminosilicate Gel during Zeolite Y Synthesis. Gels 2024, 10, 129. Petcu, G.; Anghel, E.M.; Atkinson, I.; Culita, D.C.; Apostol, N.G.; Kuncser, A.; Papa, F.; Baran, A.; Blin, J.-L.; Parvulescu, V. Composite Photocatalysts with Fe, Co, and Ni Oxides on Supports with Tetracoordinated Ti Embedded into Aluminosilicate Gel during Zeolite Y Synthesis. Gels 2024, 10, 129.

Abstract

Ti-aluminosilicate gels were used as supports for immobilization of Fe, Co and Ni oxides (5%) by impregnation, and synthesis of efficient photocatalysts in degradation of β-lactam antibiotic from water. Titanium oxide (1 and 2%) was incorporated into zeolite network by modifying the gel during the zeolitation process. The formation of the zeolite Y structure and its microporous structure were evidenced by X-ray diffraction and N2 physisorption. The structure, composition, reduction and optical properties were studied by X-ray difraction, H2-TPR, XPS, Raman, photoluminiscence and UV-Vis spectroscopy. The obtained results indicated a zeolite Y structure for all photocatalysts with tetra-coordinate Ti4+ sites. The immobilized metals from group VIII are both in the form of metal oxides such as Fe2O3, Fe3O4, CoO, Co3O4 , NiO and also in the me-tallic state (Fe0, Co0, and Ni0). A red shift of the absorption edge was observed in UV-Vis spectra of photocatalysts upon addition of Fe, Co or Ni species. The photocatalytic performances were evaluated in degradation of cefuroxime from water under visible light irradiation. The best results were obtained for iron immobilized photocatalysts. Scavenger experiments explained the photocatalytic results and their mechanisms. A different contribution of the active species to the photocatalytic reactions was evidenced.

Keywords

Ti-aluminosilicate gel; Ti-zeolite Y; Fe, Co, Ni/Ti-zeolite Y; Co oxides; cefuroxime degradation; photocatalysis; scavenger experiments.

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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