期刊
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
卷 309, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121268
关键词
Quantum dots; Styrene; Epoxidation; Formamide; Photocatalysis
资金
- National Natural Science Foundation of China, China [53337000121, 21978147, 21935001, 22108008, 22090031]
- China Postdoctoral Science Foundation, China [043260440]
In this study, a quantum-sized SnO2 on 2D graphitic carbon nitride was synthesized as a heterostructured catalyst for efficient photocatalytic styrene epoxidation at room temperature using O-2 as an oxidant. Photoelectrochemical analysis showed efficient electron transfer and enhanced charge carriers' separation and transfer processes. Furthermore, the photocatalytic styrene epoxidation was coupled with epoxide ring-opening amination, achieving the synthesis of valuable chemicals in a cascade reaction fashion.
Styrene oxide is a pivotal organic intermediate in pharmaceuticals and fine chemicals synthesis. However, the current synthesis process relies on the use of peroxy acid or chlorohydrin, which is incompatible with establishing a more sustainable chemical industry. Here, we reported the synthesis of a quantum-sized SnO2 on 2D graphitic carbon nitride (CN) as a heterostructured catalyst, which displays efficient photocatalytic styrene epoxidation at room temperature using O-2 as a mild oxidant, achieving styrene conversion of 98.1% and styrene oxide yield of 71.8%. Photoelectrochemical analysis demonstrates efficient electron transferring exists from CN to SnO2, which enhances charge carriers' separation and transfer processes. Furthermore, we couple the photocatalytic styrene epoxidation with epoxide ring-opening amination, achieving the synthesis of value-added beta-amino alcohol in a cascade reaction fashion. This work may shed light on the heterostructured catalyst design for photocatalytic selective synthesis of valuable chemicals in a sustainable manner.
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