Visible-light driven oxidative coupling of amines to imines with high selectivity in air over core-shell structured CdS@C3N4

Visible-light driven oxidative coupling of amines to imines with high selectivity in air over core-shell structured CdS@C3N4
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可见光驱动的胺与亚胺的氧化偶联,在空气中通过核壳结构的 CdS@C3N4 高选择性

DOI:
10.1016/j.apcatb.2018.03.098
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发表时间:
2018-11
期刊:
Applied Catalysis B: Environmental
影响因子:
--
通讯作者:
Fu Wen-Fu
Fu Wen-Fu
中科院分区:
其他
文献类型:
--
作者:
Xu Yong;Chen Yong;Fu Wen-Fu

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采用自组装方法制备了具有4nm厚壳的核壳结构CdS@C3N4光催化剂,并对其结构、组成和形貌进行了详细表征。该混合可见光催化剂在大气条件下对胺的氧化偶联表现出较高的光催化性能,并且在各种胺光驱动氧化成相应亚胺的过程中实现了高达>99%的稳定产物选择性。通过哈米特图和自由基捕获实验证实,空间效应和•O2−的形成对于所研究的底物的光催化转化至关重要,并提出了相关的催化机制。
A core-shell structured CdS@C3N4photocatalyst with a 4 nm thick shell was prepared using self-assembly, and its structure, composition and morphology were characterized in detail. The hybrid visible-light catalyst exhibited a high photocatalytic performance for oxidative coupling of amines under atmospheric conditions, and robust product selectivity up to >99% for photodriven oxidation of various amines to corresponding imines was achieved. It was confirmed using Hammett-type plots and radical trapping experiments that steric effects and the formation of•O2−are critical for photocatalytic conversion of the investigated substrates, and the related catalytic mechanism is presented.
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