Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2018-05-03 , DOI: 10.1016/j.apcatb.2018.03.098 Yong Xu , Yong Chen , Wen-Fu Fu
A core-shell structured [email protected]3N4 photocatalyst 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.
中文翻译:
可见光驱动的胺到亚胺的氧化偶联,在空气中在核-壳结构上具有高选择性[受电子邮件保护] 3 N 4
通过自组装制备了核壳结构的[电子邮件保护的] 3 N 4光壳,壳厚为4 nm,并对其结构,组成和形态进行了详细表征。杂化可见光催化剂在大气条件下对胺的氧化偶联表现出很高的光催化性能,对于各种胺光驱动氧化为相应的亚胺,可以获得高达> 99%的稳健产品选择性。它是用哈米特型图和自由基捕获实验证明空间效应而形成的确认• ö 2 -是所研究的底物的光催化转换关键的,并且被呈现在相关的催化机制。