Photogenerated singlet oxygen over zeolite-confined carbon dots for shape selective catalysis

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 434-439
• 页数: 6页
• 语种: 英文

摘要

Singlet oxygen as an activated oxygen species played an important role in organic synthesis.Suitable catalyst for converting ubiquitous oxygen molecule to singlet oxygen under mild conditions has attracted a wide range of attention.Herein,carbon dots have been confined into mesopores of silicalite-1 nanocrystals framework and acted as active sites for generation of singlet oxygen.The high oxygen-adsorption capacity of zeolite nanocrystals facilitated the photocatalytic generation rate of singlet oxygen,outpacing the free-standing carbon dots for 14-fold.The integrated carbon dot-zeolite nanocrystal hybrid also exhibited a special size-dependent selectivity for organic synthesis by using the in situ formed and confined singlet oxygen as active oxygen species.