Enhanced photocatalytic and antibacterial activities of novel Ag-HA bioceramic nanocatalyst for waste-water treatment.

Autor: Elbasuney S; Military Technical College, Egyptian Armed Forces, Cairo, Egypt. sherif_basuney2000@yahoo.com.; School of Chemical Engineering, Military Technical College, Cairo, Egypt. sherif_basuney2000@yahoo.com., El-Khawaga AM; Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt. Ahmed.Elkhawaga@gu.edu.eg., Elsayed MA; School of Chemical Engineering, Military Technical College, Cairo, Egypt., Elsaidy A; School of Chemical Engineering, Military Technical College, Cairo, Egypt., Correa-Duarte MA; Department of Physical Chemistry, Biomedical Research Center (CINBIO), and Institute of Biomedical Research of Ourense-Pontevedra-Vigo (IBI), Universidad de Vigo, 36310, Vigo, Spain.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Aug 24; Vol. 13 (1), pp. 13819. Date of Electronic Publication: 2023 Aug 24.
DOI: 10.1038/s41598-023-40970-4
Abstrakt: Hydroxyapatite (HA), the most common bioceramic material, offers attractive properties as a catalyst support. Highly crystalline mono-dispersed silver doped hydroxyapatite (Ag-HA) nanorods of 60 nm length was developed via hydrothermal processing. Silver dopant offered enhanced chemisorption for crystal violet (CV) contaminant. Silver was found to intensify negative charge on the catalyst surface; in this regard enhanced chemisorption of positively charged contaminants was accomplished. Silver dopant experienced decrease in the binding energy of valence electron for oxygen, calcium, and phosphorous using X-ray photoelectron spectroscopy XPS/ESCA; this finding could promote electron-hole generation and light absorption. Removal efficiency of Ag-HA nanocomposite for CV reached 88% after the synergistic effect with 1.0 mM H 2 O 2 ; silver dopant could initiate H 2 O 2 cleavage and intensify the release of active ȮH radicals. Whereas HA suffers from lack of microbial resistance; Ag-HA nanocomposite demonstrated high activity against Gram-positive (S. aureus) bacteria with zone of inhibition (ZOI) mm value of 18.0 mm, and high biofilm inhibition of 91.1%. Ag-HA nanocompsite experienced distinctive characerisitcs for utilization as green bioceramic photocatalyst for wastewater treatment.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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