| Texto completo | |
| Autor(es): |
Vera, Joelis
;
Herrera, Wence
;
Hermosilla, Edward
;
Schalchli, Heidi
;
Diaz, Ramiro
;
Fincheira, Paola
;
Seabra, Amedea B.
;
Quiroz, Andres
;
Tortella, Gonzalo
;
Rubilar, Olga
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | RESULTS IN ENGINEERING; v. 25, p. 14-pg., 2025-01-03. |
| Resumo | |
This study evaluated the photocatalytic activity of zinc oxide nanoparticles (ZnO-B) synthesized using a leaf extract of Aristotelia chilensis and the effect of calcination at different temperatures (400, 600, and 800 degrees C) on their properties and performance. The photocatalytic degradation of lignin was compared among biogenic ZnOB, chemically synthesized ZnO (ZnO-Ch), and commercial ZnO (ZnO-C). The lignin degradation rates after 24 h were ZnO-B_400 (60.8%), ZnO-B_600 (90.57%), ZnO-B_800 (27.83%), ZnO-Ch (23.2%), and ZnO-C (80.7%). The nanoparticles were characterized by TEM, XRD, FTIR, and UV-vis spectroscopy. The physicochemical properties and photocatalytic efficiency of ZnO-B were significantly influenced by calcination temperature, with ZnO-B_600 demonstrating superior photocatalytic activity under UV-A and simulated sunlight. GC-MS analysis of lignin degradation products revealed the transformation of lignin into high-value chemicals, including 2,3hexanediol, 1,2-benzenedicarboxylic acid diethyl ester, phthalic acid cyclobutyl isobutyl ester, 2-(1-oxopropyl)-benzoic acid, and 4-hydroxy-2-butanone. These findings highlight the potential of biogenic ZnO-B nanoparticles in photocatalytic processes for the valorization of Kraft lignin into value-added compounds of interest to the chemical, cosmetic, and pharmaceutical industries. (AU) | |
| Processo FAPESP: | 22/00321-0 - Nanomateriais aliados a doadores de óxido nítrico para aplicações biológicas |
| Beneficiário: | Amedea Barozzi Seabra |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 22/13444-3 - Preparação, caracterização e ensaios biológicos de nanopartículas de óxido de zinco e de selênio para aplicações biomédicas |
| Beneficiário: | Leonardo Longuini da Silva |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |