Kacar, NilayCayirli, MeltemOzden, Resat CanLokcu, ErsuAnik, Mustafa2026-02-122026-02-1220232470-1343https://doi.org/10.1021/acsomega.3c07546https://hdl.handle.net/20.500.12885/6708In this work, we aimed to synthesize an effective nano-composite photocatalyst for the photo-assisted charging of the Li-ion oxygen battery. Initially the graphene films were synthesized by chemical vapor deposition, and subsequently, g-C3N4/graphene nanocomposites were synthesized by thermal reduction as photocatalysts. FTIR spectra analysis showed that novel C=C bonds can form between g-C3N4 and graphene films during the synthesis process. The photocurrent measurements indicated that the presence of graphene considerably contributed to the visible light utilization and photocatalytic efficiency of g-C3N4. This contribution was also revealed by the UV-vis diffuse reflectance spectra measurements, which showed that the incremental addition of the graphene reduced the optical band gap of the nanocomposite incrementally. The photocatalyst performance of the g-C3N4/graphene nanocomposite was also observed in the photo-assisted charging tests of the Li-ion oxygen battery, and the presence of 2D graphene in the structure improved the effectiveness of g-C3N4 in the reduction of the charging potential, especially at high current densities.eninfo:eu-repo/semantics/openAccessMetal-Free PhotocatalystG-C3N4/Rgo NanocompositeHeterojunctionArticle10.1021/acsomega.3c075468484622746235WOS:00111446470000138075819Q2Q1