Nonylphenol polybenzoxazines-derived nitrogen-rich porous carbon (NRPC)-supported g-C 3 N 4 /Fe 3 O 4 nanocomposite for efficient high-performance supercapacitor application

Abstract

In this work, a straightforward and scalable method was used to generate nitrogen-rich porous carbon(NRPC), which was then incorporated with a graphitic carbon nitride and magnetite (g-C3N4/Fe3O4)nanocomposite, fabricated with Fe3O4 nanoparticles as an eco-friendly and economically viablecomponent. The fabricated NRPC/g-C3N4/Fe3O4 nanocomposite was applied as an electrode insupercapacitor applications. The synthesized NRPC/g-C3N4/Fe3O4 nanocomposite, NRPC, g-C3N4, andFe3O4 were characterized by analytical and morphological analyses. The spherically shaped Fe3O4nanoparticles were analyzed by field-emission scanning electron microscopy (FE-SEM) and highresolutiontransmission electron microscopy (HR-TEM). The specific surface area of NRPC/g-C3N4/Fe3O4 was determined to be 479 m2 g1. All the crosslinked composites showed exceptionalelectrochemical performance and exhibited a pseudo-capacitance behaviour. In comparison to theFe3O4 and g-C3N4/Fe3O4 electrodes, the NRPC/g-C3N4/Fe3O4 electrode showed a lower chargetransferresistance and higher capacitance. The prepared NRPC/g-C3N4/Fe3O4 electrode exhibited thehighest specific capacitance of 385 F g1 at 1 A g1 compared to Fe3O4 (112 F g1) and g-C3N4/Fe3O4(150 F g1). Furthermore, the cycling efficiency of NRPC/g-C3N4/Fe3O4 remained at 94.3% even after2000 cycles. The introduction of NRPC to g-C3N4/Fe3O4 improved its suitability for application in highperformancesupercapacitors.