Mesoporous Natural Fiber Welded Cellulose Containing Silver Nanoparticles as a Recyclable Heterogeneous Catalyst. Issue 4 (11th March 2023)

• Record Type: Journal Article
• Authors: Larm, Nathaniel E.; Gulbrandson, Anders J.; Stachurski, Christopher D.; Chase, Mary A.; Trulove, Paul C.; Durkin, David P.
• Is Part Of: Macromolecular materials and engineering. Volume 308:Issue 4(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-11
• Subjects: catalysts -- cellulose -- nanoparticles -- natural fiber welding -- silver; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.202300020
• Languages: English
• ISSNs: 1438-7492

Abstract

Abstract: Silver nanoparticles (AgNPs) are presented within mesoporous natural fiber welded (NFW) cellulose and demonstrated as robust catalysts to reduce 4‐nitrophenol using sodium borohydride. Growing AgNPs this way enables their retention within a nonderivatized, mesoporous, all‐cellulose NFW composite. At an AgNP loading of 1.0 wt%, no leaching is observed during rinsing with polar and nonpolar solvents or any of 12 catalyst cycles and the cloth is easily retrievable and reusable. Comparatively, a 1.0 wt% AgNP loading on non‐NFW cotton thread loses ≈95% of the starting Ag under similar conditions. Only at higher loadings is a very slow leaching observed in the NFW composite (<10% Ag loss). With a turnover frequency of 0.9 h –1 (as compared to 2.2 h –1 for the non‐NFW cotton thread), the catalytic activity suffers only minor impedance from the NFW structure while affording significant promise in future applications for leach‐resistant nonderivatized cotton (e.g., TiO2 or photonic nanomaterials). Finally, it is shown that combustion of AgNPs‐NFW composites creates Ag residues distinct from materials produced via combustion of AgNPs on non‐NFW cotton. While the residues produced comprise Ag and residual carbon, this method is viable for producing metal "sponges" from monometallic and bimetallic NPs on mesoporous cellulose. Abstract : The utility of nonderivatized and mesoporous cellulose, prepared using natural fiber welding, for the in situ production and entrapment of silver nanoparticles and the subsequent utilization of the composite as a nonleaching and highly recyclable heterogeneous catalyst are demonstrated.