Facile synthesis of chitosan-grafted polyacrylic acid-doped CaO nanoparticle for catalytic and antimicrobial potential

Muhammad Ikram*, Misbah Saeed, Junaid Haider, Ali Haider, Anwar Ul-Hamid*, Anum Shahzadi, Walid Nabgan*, Aqsa Rafique, Sobia Dilpazir*, Salamat Ali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The presence of cationic dyes in water causes various ailments in humans and results in environmental pollution. Removing these pollutants from the environment has become an increasingly difficult challenge in recent years. In the current study, calcium oxide (CaO) and chitosan-grafted poly (acrylic acid) (CS-g-PAA) doped CaO nanoparticles (NPs) were synthesized using co-precipitation technique for organic pollutants removal and bacterial applications. Various characterization techniques were used to study structural, functional, optical and morphological features of the prepared samples. The cubic phase formation and reduction in peak intensity upon doping were affirmed through XRD spectra. The FTIR was used to investigate the formation of the Ca-O bond as well as other molecular vibrations. The absorption and a decrease in the band gap energy (Eg) as a result of the doping were investigated with UV-Visible spectrophotometer. The charge carrier’s transfer and trap sites of prepared NPs were studied with PL spectra. The formation of CaO NPs and presence of dopant was confirmed by using EDS analysis. Moreover, the TEM images of dopant-free CaO showed NPs with spherical morphology. CS-g-PAA doped CaO NPs displayed significant catalytic activity (CA) against methylene blue (MB) in basic medium. Significant antimicrobial potential was measured against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) pathogens. Tests with S. aureus bacteria revealed strong bactericidal activity, with a significant inhibition zone measured at 5.15 mm. In this study, dye degradation using catalytic activity (without sunlight) with binary-doped CaO NPs was examined.

Original languageEnglish
Pages (from-to)2657-2670
Number of pages14
JournalApplied Nanoscience (Switzerland)
Volume12
Issue number9
DOIs
StatePublished - Sep 2022

Bibliographical note

Publisher Copyright:
© 2022, King Abdulaziz City for Science and Technology.

Keywords

  • Antibacterial activity
  • Catalytic activity
  • Chitosan
  • Co-precipitation
  • Dye degradation
  • Methylene blue
  • Nanoparticles

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Physical and Theoretical Chemistry
  • Cell Biology
  • Electrical and Electronic Engineering

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