First Author:Zheng Jianwei

Correspondence Author:Gang Zhang,Hong-bin Sun

Co author:Yang L,Liying Zhang

Journal:Nanotechnology

Issue:26

Volume:32

Impact Factor:2.9

DOI number:10.1088/1361-6528/abef2f

Affiliation of Author(s):Department of Chemistry, Northeastern University

Teaching and Research Group:物理化学

Place of Publication:ENGLAND

Abstract:Core–shell nanocomposites with a catalytic metal-organic framework (MOF) shell are more effective and stable than bare MOF. We have successfully designed an effective heterogeneous catalyst for the synthesis of benzimidazole by integrating acidic catalytic activity, and promoted the aerobic oxidation and magnetic recyclability of core–shell nanocomposite Fe3O4@SiO2@UiO-66. The Fe3O4@SiO2 core is encapsulated by the in situ-grown UiO-66 shell, and the UiO-66 shell retains the porous structure and crystallinity of UiO-66 with abundant exposed Lewis acid sites. It shows high catalytic ability for the synthesis of various benzimidazoles through the acid-catalyzed condensation and aerobic oxidation with in situ oxygen. The Fe3O4@SiO2 core provides magnetic recyclability of Fe3O4@SiO2@UiO-66, and maintains high catalytic ability and stability over six cycles.

Key Words:nanocomposites, heterogeneous catalysis, metal-organic frameworks, core–shell structure, benzimidazoles

Document Code:WOS:000639519900001

Discipline:Natural Science

First-Level Discipline:Chemistry

ISSN No.:0957-4484

Translation or Not:no