Chitosan and PVP doped cobalt/zinc catalysts for dye degradation and antimicrobial activity supported by molecular docking analysis

Haseen Ullah, Sobia Dilpazir, Ali Haider*, Anum Shahzadi, Anwar Ul-Hamid, Ghafar Ali, Sadam Hussain, Ahmed M. Fouda, Muhammad Ikram

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A well-defined heterojunction of cobalt oxide and zinc oxide (Co3O4/ZnO) was synthesized using different concentrations (2 and 4 wt%) of chitosan (CS) with a fixed amount (3 wt%) of polyvinylpyrrolidone (PVP) via co-precipitation method. The addition of CS and PVP increased the specific surface area and reduced the charge recombination rate of Co3O4/ZnO, declaring it a promising material for catalytic degradation of rhodamine B (RhB) dye and has antibacterial effects against Staphylococcus aureus (S. aureus) bacteria. Numerous characterizations were conducted to elucidate the structural, optical, and compositional properties of prepared NCs. The XRD pattern endorsed the cubic and hexagonal structure of Co3O4/ZnO, and the calculated crystallite size (14.62 nm) of Co3O4/ZnO and decreased (14.62–13.14 nm) with CS and PVP. FTIR spectra display the stretching and vibrational bending modes of Co-O, and Zn-O. SAED analysis validated the polycrystalline nature of Co3O4/ZnO. UV-Vis spectra of Co3O4/ZnO showed a blue shift with the inclusion of CS and PVP, consistent with an increase in bandgap energy (Eg). Additionally, 4 wt% CS/PVP-Co3O4/ZnO exhibited maximum dye degradation (83.33 %) in neutral medium and antibacterial activity (7.75 mm) against S. aureus. The bactericidal action of CS/PVP-Co3O4/ZnO nanocomposite (NCs) was confirmed by molecular docking, demonstrating inhibition of tyrosyl-tRNA synthetase (TyrRS) and DNA gyrase against S. aureus.

Original languageEnglish
Article number111150
JournalMaterials Today Communications
Volume42
DOIs
StatePublished - Jan 2025

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Antimicrobial activity
  • Chitosan
  • Dye degradation
  • Molecular docking
  • Polyvinylpyrrolidone

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Materials Chemistry

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