Synthesis and characterization of plate like high surface area MgO nanoparticles for their antibacterial activity against Bacillus cereus (MTCC 430) and Pseudomonas aeruginosa (MTCC 424) bacterias

In the present work high surface area MgO nanoparticles were synthesized by simple precipitation method without using any directing agent or capping agent. In this regard various experimental conditions required to achieve high surface area MgO nanoparticles have been addressed in this work. The experimental conditions namely, pH, calcination temperature, digestion temperature, digestion temperature and nature of precursor and precipitating agent, collectively produce high surface area MgO nanoparticles. The optical bandgap, functional group identification, the crystalline phase, surface morphology of MgO nanoparticles were obtained from UV- Vis, FTIR, XRD, SEM, and HRTEM techniques. The optical bandgap was found to be 5.8 eV. With the help of BET technique both specific surface area and the average pore diameter values were obtained and were found to be 246.95 g/m2 and 6.721 nm respectively. The antibacterial activity of MgO nanoparticles was tested against Bacillus cereus (MTCC 430) and Pseudomonas aeruginosa (MTCC 424) bacterias. The material exhibited good antibacterial activity against both bacterias. A dosage concentration of 80 mg/ml concentration was sufficient to inhibit the bacterial growth. Further analysed the effect of particles size, surface area, optical bandgap, and morphology on antibacterial activity of MgO nanoparticles.

Automated summary

In this work, high surface area MgO nanoparticles were successfully synthesized without using any directing agent or capping agent. The experimental conditions required to achieve high surface area MgO nanoparticles were investigated. The optical, structural, and morphological properties of the MgO nanoparticles were characterized using various techniques. The MgO nanoparticles exhibited good antibacterial activity against different bacteria.