Bio-inspired fabrication of chitosan/PEO/Ti 3 C 2 T x 2D MXene nanosheets supported palladium composite nanofiber catalysts via electrospinning

• Published in: International journal of biological macromolecules Vol. 279; no. Pt 4; p. 135460
• Main Authors: Liu, Yonghong, Wu, Yuanyuan, Zhou, Jie, Li, Na, Zeng, Minfeng, Ren, Xiaorong, Shao, Linjun, Chen, Jinyang, Ying, Jiadi, Zhang, Tao, Xu, Wei, Yang, Zhen
• Format: Journal Article
• Language: English
• Published: Netherlands 10.09.2024
• Subjects: MXene; Chitosan; Nanofibers; Catalyst
• ISSN: 1879-0003

In this study, novel chitosan/polyethylene oxide/Ti C T 2D MXene nanosheets (CS/PEO/Ti C T ) nanofibers were successfully prepared by a continuous electrospinning process. During the electrospinning process, induced by the syringe tip capillary effects and electric field force, the Ti C T nanosheets were aligned along the direction of the nanofiber formation to occur a highly oriented structure. This well-ordered arrangement of the inorganic Ti C T nanosheets within the organic polymer matrix nanofiber was similar with nacre-like 'brick-and-motar' structure to some extent, resulting in a marked increase in thermal stability and mechanical properties of the resultant CS/PEO/Ti C T nanofiber. As 4 wt% of Ti C T nanosheets loaded, the highest tensile strength of the CS/PEO/Ti C T nanofiber mats was achieved as 31.7 MPa, about two times that of neat CS/PEO nanofibers. Uniformly dispersed Pd nanoparticles in size of about 1.6 nm have been successfully immobilized on the composite nanofiber with a solution impregnation process. With a loading as low as 0.2 mol% of Pd, the resultant Pd@CS/PEO/Ti C T composite nanofiber catalysts were highly active for both Heck and Sonogashira coupling reactions with broad reactants application scope, and could be recycled 15 runs without significant loss of activities.