Experimental and DFT study of GO-decorated CaO quantum dots for catalytic dye degradation and bactericidal potential

Mahreen Khan, Muhammad Ikram*, Ali Haider, Anwar Ul-Hamid, Hameed Ullah, Iram Shahzadi, Sherdil Khan, Mohammed Benali Kanoun, Souraya Goumri-Said, Francisco Medina, Walid Nabgan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This research lays the groundwork for preparing graphene oxide (GO)-doped CaO nanocomposites for efficient antibacterial potential and dye degradation. The study aimed to reduce the recombination rate of the electron hole (e/h+) of CaO and improve charge transfer. This issue can be minimized by doping high-surface area GO into CaO quantum dots (QDs). Herein, the one-pot co-precipitation technique has prepared various concentrations (1, 3, and 5 wt%) of GO-doped CaO. Characterization techniques were used to investigate optical, elemental analysis, microstructural, functional, and morphological properties. The addition of GO into QDs showed excellent catalytic activity (CA) to control sample CaO against methylene blue (MB) in basic and acidic media compared to the neutral media. The synergistic effect of morphological alternation attributed to an increase in the mechanism of CA upon doping. Various concentrations of GO to QDs promised remarkable bactericidal potency against Escherichia coli.

Original languageEnglish
Article number1158399
JournalFrontiers in Environmental Science
StatePublished - 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 Khan, Ikram, Haider, Ul-Hamid, Ullah, Shahzadi, Khan, Kanoun, Goumri-Said, Medina and Nabgan.


  • CaO
  • DFT
  • antibacterial activity
  • catalysis
  • graphene oxide

ASJC Scopus subject areas

  • General Environmental Science


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