材料科学
光催化
木质素
量子点
配体(生物化学)
无机化学
化学工程
光化学
纳米技术
催化作用
有机化学
受体
化学
生物化学
工程类
作者
Guo Ye,Xiya Chen,Yuxin Liu,Zhenjun Chen,Peiyuan Guo,Dongxiang Luo,Menglong Zhang,Xiao Liu
标识
DOI:10.1021/acsami.3c18957
摘要
In a dual-functional lignin valorization system, a harmonious oxidation and reduction rate is a prerequisite for high photocatalytic performance. Herein, an efficient and facile ligand manipulating strategy to balance the redox reaction process is exploited via decorating the surface of the CdS@ZnxCd1–xS@ZnS gradient-alloyed quantum dots with both inorganic ligands of hexafluorophosphate (PF6–) and organic ligands of mercaptopropionic acid (MPA). Inorganic ion ligands in this system provide a promotion for intermediator reduction reactions. By optimizing the ligand composition on the quantum dot surface, we achieve precise control over the extent of oxidation and reduction, enabling selective modification of reaction products; that is, the conversion rate of 2-phenoxy-1-phenylethanol reached 99%. Surface engineering by regulating the ligand type demonstrates that PF6– and thiocyanate (SCN–) inorganic ion ligands contribute significantly toward electron transfer, while MPA ligands have beneficial effects on the hole-transfer procedure, which is predominantly dependent on their steric hindrance, electrostatic action, and passivation effect. The present study offers insights into the development of efficient quantum dot photocatalysts for dual-functional biomass valorization through ligand design.
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