Selective (sono)photocatalytic cleavage of lignin-inspired β–O–4 linkages to phenolics by ultrasound derived 1-D titanate nanomaterials
Loading...
1-s2.0-S1350417724000774-main.pdf (10.17 MB)
1-s2.0-S1350417724000774-mmc1.docx (1.78 MB)
Date
2024-03-02
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Abstract
Lignin to value-added aromatic compounds is still an open challenge, since the selective cleavage of the linkages interconnecting the aromatic molecules, especially the β-O-4 ones, is not efficiently achieved yet. Herein, novel titania-based nanostructured materials were synthesized using low-power-low-frequency ultrasound that demonstrated high efficiency for the selective cleavage of Cα-Cβ bond of β-O-4 linkages of lignin-inspired model compounds. Going a step ahead, experiments of sonophotocatalytic valorization of 2-phenoxy-1-phenylethanol were contacted for the first time, where the exposure to ultrasound leading to better conversion and selectivity towards the desired products in the case of the novel ultrasound-synthesized nano-photocatalyst. Mechanistic insights showcased that photogenerated holes are the main active species in the catalytic process. In general, this research work provides a green, effective, and cost-effective approach for the selective and efficient lignin valorization.
Description
Keywords
Citation
Ultrasonics Sonochemistry 104 (2024) 106829 ; https://doi.org/10.1016/j.ultsonch.2024.106829