Visible-light-driven photocatalytic activity of 2D/1D g-C3N4/Bi2S3 heterojunction for efficient degradation of ciprofloxacin and methylene blue

Efficiently treating polluted water is crucial for combating waterborne diseases, preserving aquatic species, and
ensuring a long-term clean water supply. In this study, we studied the elimination of both dye and drug pollutants
using a Bi2S3:g-C3N4 nanocomposite photocatalyst. The sample structure, functional group, and
morphology of the prepared samples were studied using XRD, HRTEM, XPS, FTIR, and UV–Vis. spectroscopy.
Bi2S3:g-C3N4 nanocomposite exhibited higher photocatalytic activity compared to the bare samples. This higher
photocatalytic performance may be due to the efficient separation of electron-hole pairs and the enhanced
charge-carrier transport. The 2D/2D interface between Bi2S3 and g-C3N4 provides a large surface area and strong
interfacial charge transfer. Moreover, this heterojunction efficiently controls charge recombination by extending
the lifetime of the photogenerated carriers. Bi2S3:g-C3N4 nanocomposite exhibits excellent photocatalytic
degradation of organic pollutants such as methylene blue and ciprofloxacin. Based on these results, highlight the
strong potential of the Bi2S3:g-C3N4 nanocomposite for environmentally friendly wastewater treatment
applications.