Solvent-free aerobic photocatalytic oxidation of alcohols to aldehydes over ZnO/C3N4
Solvent-free aerobic photocatalytic oxidation of alcohols to aldehydes over ZnO/C3N4
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DOI：
10.1039/d2gc02293a
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发表时间：
2022-08-30
期刊：
影响因子：
9.8
通讯作者：
Han, Buxing
中科院分区：
文献类型：
--
作者：
Jiang, Xulu;Wang, Weitao;Han, Buxing
It is attractive but challenging to develop a non-noble metal-based photocatalytic system for the selective oxidation of benzyl alcohol to benzaldehyde under solvent-free conditions. Herein, a Z-scheme heterojunction photocatalyst of ZnO/C3N4 was designed and prepared. Under solvent-free irradiation conditions, benzyl alcohol can be exclusively oxidized to benzaldehyde with a yield of 99.8% and a formation rate of 16 633 mu mol g(-1) h(-1) at room temperature. To the best of our understanding, the photocatalytic activity and selectivity of this oxidation process are much better than those reported for noble and non-noble metal-based photocatalyses. The water generated in the solvent-free oxidation process is revealed to disfavor the activity and selectivity. In addition, the mechanism of the title reaction is proposed. The present solvent-free photocatalytic system can be applied for the oxidation of benzylic, allylic, heterocyclic, and aliphatic alcohols to their corresponding aldehydes.
