Photodegradation of lignin biowaste catalyzed by biosynthesized zinc oxide nanoparticles using the leaf extract of Aristotelia chilensis

Photodegradation of lignin biowaste catalyzed by biosynthesized zinc oxide nanoparticles using the leaf extract of Aristotelia chilensis

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 °C) on their properties and performance. The photocatalytic degradation of lignin...

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Main Authors: Joelis Vera, Wence Herrera, Edward Hermosilla, Heidi Schalchli, Ramiro Díaz, Paola Fincheira, Amedea B. Seabra, Andrés Quiroz, Gonzalo Tortella, Olga Rubilar
Format: Article
Language:English
Published: Elsevier 2025-03-01
Series:Results in Engineering
Subjects:
Green synthesis
Chemical synthesis
Zinc oxide nanoparticles
Kraft lignin
Photocatalysts, photodegradation
Depolymerization
Online Access:http://www.sciencedirect.com/science/article/pii/S2590123024021091
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Summary: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 °C) on their properties and performance. The photocatalytic degradation of lignin was compared among biogenic ZnO-B, 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 2,3-hexanediol, 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.
ISSN:2590-1230

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