Harnessing the Synergistic Power of Ce 2 S 3 /TiO 2 S-Scheme Heterojunctions for Profound C–O Bond Cleavage in Lignin Model Compounds

作者：Hongwu Liao, Yulin Zhou, Zhuo Chen, Swellam W. Sharshir, Sameh M. Osman, Chong Wang, Meng An, Yusuke Yamauchi, Yusuke Asakura, Zhanhui Yuan · 发表于：ACS Catalysis · 年份：2024 · DOI：10.1021/acscatal.4c00297 · 被引用次数：54 · 研究领域：Catalysis and Hydrodesulfurization Studies、Advanced Photocatalysis Techniques、Lignin and Wood Chemistry

In the context of achieving carbon neutrality, converting lignin-derived molecules into high-value products through photocatalytic technology provides an environmentally friendly pathway. Establishing energy-efficient processes for converting lignin derivatives requires the construction of highly active and selective photocatalysts. However, enhancing the efficiency and selectivity of photocatalysts for lignin degradation poses an ongoing challenge due to discrepancies in the redox potential and the rapid recombination of photogenerated carriers. To address these significant obstacles, we devised an innovative strategy by developing a Ce 2 S 3 nanoparticle-anchored TiO 2 nanorod (Ce 2 S 3 /TiO 2 ). This advanced photocatalyst with the S-scheme heterojunction, enabling simultaneous control of carrier dynamics and band structure, was used to study the photocatalytic degradation of the lignin model compound 2-phenoxy-1-acetophenone. Moreover, the photocatalyst can cleave the C β -O-4 bond selectively to convert the lignin model compound 2-phenoxy-1-acetophenone into phenol and acetophenone under visible-light irradiation. The yields are up to 94 and 80%, respectively, and 94 or 1.4 times greater than those obtained by pure TiO 2 or Ce 2 S 3 individually. In addition, our study for the increased activity in Ce 2 S 3 /TiO 2 based on density functional theory calculations emphasizes the pivotal role of the S-scheme heterojunction generated between Ce 2 S 3 and TiO 2 . This heteroju...