通过微波-超声法用羟基对CeO结构进行调控及其在亚胺催化中的应用。

Chang Xijiang, Ding Huihui, Yang Jingxia

College of Science, Donghua University, Shanghai, China.

College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China.

Front Chem. 2022 May 31;10:916092. doi: 10.3389/fchem.2022.916092. eCollection 2022.

CeO with fusiform structures were prepared by the combined microwave-ultrasonic method, and their morphologies and surface structure were changed by simply adding different amounts of HO (1-5 ml) to the precursor system. The addition of HO changed the PVP micelle structure and the surface state, resulting in CeO with a different specific surface area (64-111 m g) and Ce defects (16.5%-28.1%). The sample with 2 ml HO exhibited a high surface area (111.3 m∙g) and relatively more surface defects (Ce%: 28.1%), resulting in excellent catalytic activity (4.34 mmol g h).

通过微波 - 超声联合方法制备了具有梭形结构的CeO，通过向前驱体体系中简单添加不同量的H₂O₂（1 - 5毫升）来改变其形态和表面结构。H₂O₂的添加改变了PVP胶束结构和表面状态，导致CeO具有不同的比表面积（64 - 111平方米/克）和Ce缺陷（16.5% - 28.1%）。添加2毫升H₂O₂的样品表现出高比表面积（111.3平方米/克）和相对更多的表面缺陷（Ce%：28.1%），从而具有优异的催化活性（4.34毫摩尔/克·小时）。