Reusable catalysts based on CeO 2 /cellulose derivative with visible light photocatalytic activity tuned by noble metal nanoparticles inclusion.

Autor: Melinte V; 'Petru Poni' Institute of Macromolecular Chemistry, Polyaddition and Photochemistry Department, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania., Trifan SI; 'Petru Poni' Institute of Macromolecular Chemistry, Polyaddition and Photochemistry Department, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania., Chibac-Scutaru AL; 'Petru Poni' Institute of Macromolecular Chemistry, Polyaddition and Photochemistry Department, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania. Electronic address: andreea.chibac@icmpp.ro., Podasca V; 'Petru Poni' Institute of Macromolecular Chemistry, Polyaddition and Photochemistry Department, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania., Coseri S; 'Petru Poni' Institute of Macromolecular Chemistry, Polyaddition and Photochemistry Department, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2022 Dec 01; Vol. 222 (Pt A), pp. 736-749. Date of Electronic Publication: 2022 Sep 27.
DOI: 10.1016/j.ijbiomac.2022.09.221
Abstrakt: For environmental preservation, it is crucial to effectively remove organic waste from water. Several approaches have been put forth, but photocatalysis stands out as a quick and effective solution. In this study, some hybrid polymeric structures that were created by photopolymerizing cellulose acetate/castor oil urethane methacrylates with embedded CeO 2 nanoparticles (NPs) and in situ photogenerated noble metal nanoparticles (Ag, Au, Pd) are characterized, and photochemically thoroughly evaluated. The effective modification of cellulose acetate with urethane methacrylate sequences and the degree of functionalization were first observed using 1 H NMR and FTIR spectra. Additionally, scanning and transmission electron microscopy, X-ray diffraction, FT-IR and UV-visible spectroscopy were utilized to analyse the resultant nanocomposites. The homogeneous dispersion of CeO 2 NPs (10-40 nm) into an organic matrix with the suitable functionalities, namely urethane and hydroxyl groups, favour the interfacial charge transfer reducing the E g up to 2.85 eV. Moreover, noble metal nanoparticles (5-15 nm), such as Ag, Au and Pd introduction in nanocomposites, significantly lowered the E g : 2.1 eV for CeAg samples, 1.7 eV for CeAu films and 1.5 eV for CePd films, respectively. This opens up new avenues for the creation of flexible cellulose-based photocatalysts that are active in visible light.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: