Preparation of Magnetic CuFe2O4@Ag@ZIF-8 Nanocomposites with Highly Catalytic Activity Based on Cellulose Nanocrystals

Molecules

Hao Li¹  Sufeng Zhang¹  Dongyan Zhao¹  Chen Hou¹  Yongshe Xu¹  Wenqiang Chen¹ 

[1] College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi’an 710021, China;

关键词: cufe₂o₄ nanoparticles;    cellulose nanocrystals;    ag nanoparticles;    zif-8 catalysis;    4-nitrophenol reduction;   

DOI  :  10.3390/molecules25010124

来源: DOAJ

【 摘 要 】

A facile approach was successfully developed for synthesis of cellulose nanocrystals (CNC)-supported magnetic CuFe₂O₄@Ag@ZIF-8 nanospheres which consist of a paramagnetic CuFe₂O₄@Ag core and porous ZIF-8 shell. The CuFe₂O₄ nanoparticles (NPs) were first prepared in the presence of CNC and dispersant. Ag NPs were then deposited on the CuFe₂O₄/CNC composites via an in situ reduction directed by dopamine polymerization (PDA). The CuFe₂O₄/CNC@Ag@ZIF-8 nanocomposite was characterized by TEM, FTIR, XRD, N₂ adsorption-desorption isotherms, VSM, and XPS. Catalytic studies showed that the CuFe₂O₄/CNC@Ag@ZIF-8 catalyst had much higher catalytic activity than CuFe₂O₄@Ag catalyst with the rate constant of 0.64 min⁻¹. Because of the integration of ZIF-8 with CuFe₂O₄/CNC@Ag that combines the advantaged of each component, the nanocomposites were demonstrated to have an enhanced catalytic activity in heterogeneous catalysis. Therefore, these results demonstrate a new method for the fabrication of CNC-supported magnetic core-shell catalysts, which display great potential for application in biocatalysis and environmental chemistry.

【 授权许可】

Unknown