Eco-Friendly Facile Conversion of Waste Eggshells into CaO Nanoparticles for Environmental Applications

Kathalingam Adaikalam, Sajjad Hussain, Periasamy Anbu, Arulmozhi Rajaram, Iyyakkannu Sivanesan, Hyun Seok Kim

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Amongst the many types of food waste, eggshells contain various minerals and bioactive materials, and they can become hazardous if not properly disposed of. However, they can be made useful for the environment and people by being converted to environmentally friendly catalytic materials or environmental purification agents. Simple calcination can enhance their properties and thereby render them suitable for catalytic and environmental applications. This work aimed to prepare CaO from waste eggshells and examine its effectiveness in photocatalytic pollution remediation, electrocatalytic activity, optical sensing, and antibacterial activities. As opposed to other techniques, this calcination process does not require any chemical reagents due to the high purity of CaCO3 in eggshells. Calcium oxide nanoparticles were prepared by subjecting waste eggshells (ES) to high-temperature calcination, and the synthesized CaO nanoparticles were characterized for their structural, morphological, chemical, optical, and other properties. Furthermore, their photocatalytic degradation of methylene blue dye and antibacterial efficiency against Escherichia coli and Staphylococcus aureus were investigated. It was found that the green-converted CaO can be efficiently used in environmental applications, showing good catalytic properties.

Original languageEnglish
Article number1620
JournalNanomaterials
Volume14
Issue number20
DOIs
StatePublished - Oct 2024

Keywords

  • antibacterial activity
  • calcination
  • calcium oxide
  • dye degradation
  • methylene blue dye
  • photocatalyst
  • waste eggshell utilization

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