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Polymer nanocomposites containing pristine (PCNF) and amine‐functionalized (NFCNF) electrospun carbon nanofibers were fabricated. The amine‐terminated functional groups on CNFs, with a surface coverage of 2.76 mmol/g, react with the epoxy monomers forming covalent linkages for better dispersion and stronger interface. The improved load transfer resulted in an improvement of 82% in storage modulus (rubbery region~70°C) and 20°C increase in the glass transition temperature for 1 wt% NFCNF‐epoxy. Tensile strength and modulus improves by 22% and 27%, respectively, for 2 wt% NFCNF‐epoxy. The thermal stability, dielectric properties and AC/DC conductivity are discussed in terms of the interfacial characteristics. These results highlight the potential of electrospun CNFs as structural and functional reinforcement. [ABSTRACT FROM AUTHOR]

• Graphitic carbon nitride loaded titania nanofibers as z-scheme photocatalysts. • Synergistic effect by surface plasmon resonance of silver nanoparticles. • Photodegradation of organic dyes and photoreduction of heavy metal ions. • Bactericidal efficiency against E. coli and S. aureus. • Hierarchical multi-functional nanofiber based materials for water remediation. Here, we report synergistic sensitization of electrospun TiO 2 nanofibers (TNFs) by heterojunction formation with exfoliated g-C 3 N 4 nanosheets and decorated with Ag nanoparticles (NPs) uniformly over its surface for enhanced photocatalytic activity in simulated solar light. These composite catalysts displayed first-order rate constants of 0.087 min−1 and 0.031 min−1 for photodegradation of methylene blue (MB) and photoreduction of Cr(VI) under simulated sunlight which is 75% and 87% higher than the pristine TNFs, respectively, and better than the previously reported results for similar materials. Moreover, 99% of E. coli and 83% S. aureus were inactivated after 60 min of irradiation. The enhanced activities of these prepared ternary composite nanofibers are attributed to the effective Z-scheme heterojunction formation between TiO 2 and g-C 3 N 4 due to the preferred band positions which facilitates the charge transfer and inhibit the recombination of charge carriers. Moreover, visible-light harvesting, charge separation and antimicrobial nature of these nanofibers were promoted by the Ag NPs due to the surface plasmon resonance (SPR) effect. [ABSTRACT FROM AUTHOR]