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Hashemi Hosseini, Behdokht, 2026, "Sono-enhanced Selective Oxidation of Lignin-based Coniferyl Alcohol in Continuous Flow Through a Synergistic Metal Oxide Heterostructure", https://doi.org/10.18150/TIPLLG, RepOD, V1
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The authors would like to express our sincere appreciation to the National Science Center (NCN), Poland, for their generous support under the research project OPUS 20 no. 2020/39/B/ST5/00076
The study investigates the selective oxidation of coniferyl alcohol, a lignin-derived compound, using a CuBi₂O₄/TiO₂ heterostructure under visible light (455 nm), combined with ultrasound in a continuous-flow system.
The CuBi₂O₄/TiO₂ catalyst showed the best photocatalytic performance, reaching 92% conversion, with selectivities of 46% for coniferyl aldehyde and 32% for ferulic acid after 4 hours. Combining ultrasound (22 kHz) with visible-light irradiation further enhanced the oxidation process, although product selectivity fluctuated over time.
Scavenger tests identified superoxide radicals (O₂•⁻) as the main reactive oxygen species. Overall, the study demonstrates the potential of combining sonication, photocatalysis, and continuous-flow processing for more efficient lignin valorization.
Sono-photocatalysis, continuous flow, lignin-based coniferyl alcohol, visible light, CBO/TiO2 (CBO/TiO2) hetero-system
CC BY - Creative Commons Attribution 4.0
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