Photocatalytic Efficiency of g-C<sub>3</sub>N<sub>4</sub>/Graphene Nanocomposites in the Photo-Assisted Charging of the Li-Ion Oxygen Battery

Kaçar N., Çayirli M., Özden R. C., Lökçü E., Anik M.

ACS OMEGA, cilt.8, sa.48, ss.46227-46235, 2023 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 8 Sayı: 48
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1021/acsomega.3c07546
  • Dergi Adı: ACS OMEGA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Directory of Open Access Journals
  • Sayfa Sayıları: ss.46227-46235
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In 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.