Preparation of Ag/C fiber with nanostructure through in situ thermally induced redox reaction between PVA and AgNO₃ and its catalysis for 4‐nitrophenol reduction

Abstract

A novel synthesized Ag/C fibrous catalyst based on in situ thermally induced redox reaction of PVA/AgNO3 composite fibers was proposed. Utilizing the plasticization and complexation of AgNO3 solution, the melt spinning of PVA/AgNO3 composites was accomplished. Through the in situ thermally induced redox reaction on PVA/AgNO3 composite fibers combined with carbonization of PVA and reduction of Ag+, the synthesized Ag/C fibrous catalyst was prepared with nanosilver particles with average diameter of 130 nm immobilized on the loose microstructural carbon layers. The synthesized Ag/C fibrous catalyst exhibited excellent catalytic activity and reused for at least five cycles for the reduction of 4‐nitrophenol, which may hold great promise in effective and eco‐friendly waste water treatment.

Study on Preparation of Triangular Melt-Spinning Poly (Vinyl Alcohol) Fibers and Its Fabric Strengthening and Toughening Epoxy

“…A practical method based on intermolecular complexation was proposed to realize the thermoplastic processing of PVA [ 14 , 15 , 16 ]. Water as a strong polar molecule was introduced to realize the sufficiently stable melt spinning [ 17 ]. The plasticization is reflected in Figure 3 a; the neat PVA exhibited two characteristic peaks at 2θ = 19.5° and 22.5° corresponding to the (110) and (200) reflections as the main crystalline range, respectively.…”

Formation, structure, and morphology of nanofiber mat on the base sodium‐carboxymethylcellulose/polyvinyl‐alcohol/silver nanoparticles composite

“…The synthesized Ag/C fibrous catalyst exhibited excellent catalytic activity and could be reused for at least five cycles for the reduction of 4‐nitrophenol. This holds great promise for effective and eco‐friendly wastewater treatment 26 …”

“…This holds great promise for effective and eco-friendly wastewater treatment. 26 Using sodium borohydride via chemical methods, Ag NPs with sizes of 43 ± 5 nm were incorporated onto regenerated cellulose nanofibers with varying concentrations and diameters of 300-400 nm. These nanofibers were utilized as an antimicrobial agent against Gram-negative Escherichia coli BH5 α, Gram-positive Spectromyces arenus, and Aspergillus flavus, exhibiting strong inhibition activities.…”