Antibacterial Activity of Boehmite Nanoparticles Synthesized by Arc Discharge in Deionized Water Technique

Abstract

In this work, boehmite AlO(OH) nanoparticles were synthesized by arc discharge technique. The structural, surface morphology and optical properties were characterized by X-Ray Diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), Atomic Force Microscope (AFM) and Ultraviolet-Visible-Near In far Red spectrophotometer respectively. XRD results show pure orthorhombic crystalline structure of gamma-AlO(OH). FTIR absorption spectrum shows that the boehmite nps have the octahedron region which extends from (400-800 cm -1 ) corresponding to the vibrational frequencies of Al-O bonding. The AFM shows that boehmite NPs are spherical in shape and the average diameter is around 89 nm. Finally the optical properties results show that the boehmite nps have absorption peak at 210 nm and an optical band gap of 4.1 eV.Boehmite nps was examined susceptibility to effect on the different types of bacteria, Escherichia coli (Gram-negative) and Staphylococcus aurous (Gram-positive) strains bacteria.Boehmite NPs showed excellent antibacterial activity against two types of bacteria. Also, Staphylococcus aurous exhibited the highest sensitivity to boehmite NPs while Escherichia coli were the least sensitive.

Sol-gel derived boehmite nanostructures is a versatile nanoplatform for biomedical applications

“…To make in vitro research more fulfilled we studied the effect of various concentrations of boehmite NPs on the growth of gram-negative E. coli and gram-positive S. aureus . In the literature, there are only fragmentary studies of antibacterial boehmite properties, some of which do not have statistical support 31,32 . In order to conduct a comprehensive analysis of boehmite NPs effects on microorganisms, we applied a set of methods, including the agar diffusion test, the colony-forming unit analysis (CFU/mL), and the compound effect on bacterial gene exchange.…”