TY - EJOUR
AU - Beiranvand, Maryam
AU - Farhadi, Saeed
AU - Mohammadi, Abdelnassar
PY - 2024
DA - February
TI - Graphene Oxide/Hydroxyapatite/Silver (rGO/HAP/Ag) nanocomposite: Synthesis, characterization, catalytic and antibacterial activity
T2 - International Journal of Nano Dimension (Int. J. Nano Dimens.)
VL - 10
L1 - https://oiccpress.com/international-journal-of-nano-dimension/article/graphene-oxide-hydroxyapatite-silver-rgo-hap-ag-nanocomposite-synthesis-characterization-catalytic-and-antibacterial-activity/
N2 - In this paper, a novel ternary nanocomposite namely reduced graphene oxide/hydroxyapatite/silver (rGO/HAP/Ag) was prepared by a simple hydrothermal method using graphene oxide nanosheets, Ca(NO3)2, (NH4)2HPO4, and AgNO3 as starting materials. The as-prepared nanocomposite was characterized by using various photophysical techniques including Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). Additionally, the antibacterial and catalytic activities of the nanocomposite were evaluated. The results showed that the rGO/HAP/Ag nanocomposite exhibited high performance in the reduction of toxic nitro compounds (4-nitrophenol, 2-nitrophenol, 4-nitroaniline, and 2-nitroaniline) into the less toxic corresponding amines using NaBH4 within 21-42 min with a rate constant equal to 0.1646, 0.0898, 0.1071 and 0.2 min-1, respectively. Moreover, the rGO/HAP/Ag nanocomposite could be separated from the reaction mixture due to its heterogeneous nature and reused without any change in structure. In addition, the antibacterial activity of the rGO/HAP/Ag nanocomposite by disk diffusion method was evaluated against Gram-positive bacteria (Bacillus cereus and Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli and Klebsiella pneumonia). The results showed that this novel ternary nanocomposite has good antibacterial activity against Gram-positive bacteria.
IS - 2
PB - OICC Press
KW - Hydroxyapatite, Graphene oxide nanosheets, Nitro reduction, Ternary nanocomposite, Antibacterial activity, Silver nanoparticles 
EN -