Catalytic conversion of 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 C-C 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 catalytic lignin valorization.

中文翻译：

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通过超声衍生的一维二氧化钛纳米材料选择性（声）光催化裂解木质素启发的 β-O-4 键与酚类物质

将木质素催化转化为增值芳香族化合物仍然是一个开放的挑战，因为尚未有效地实现芳香族分子（尤其是 β-O-4 分子）互连键的选择性断裂。在此，利用低功率低频超声波合成了新型二氧化钛基纳米结构材料，该材料证明了木质素模型化合物的 β-O-4 连接的 CC 键选择性断裂的高效性。向前迈出了一步，首次进行了 2-苯氧基-1-苯基乙醇的声光催化增值实验，其中在新型超声合成纳米材料的情况下，暴露于超声导致对所需产物的更好转化和选择性。光催化剂。机理见解表明光生空穴是催化过程中的主要活性物质。总的来说，这项研究工作为选择性和高效的催化木质素增值提供了一种绿色、有效且具有成本效益的方法。