Comparison of Green and Chemical Synthesis of Tin Oxide Nanoparticles via Co-precipitation Technique and Analysis of Its Optical Properties

In this research two methods were used for the co-precipitation synthesis of tin oxide NPs, the first was by the chemical synthesis using the CTAB surfactant and the second was the green synthesis employing Teucrium polium plant as the surfactant. The structure of the NPs was identified by the X-ray diffraction pattern (XRD). Also, the scanning electron microscopy (SEM) was utilized to recognition of morphology of the NPs. And for determining the functional groups of the particles, Fourier-transform infrared spectroscopy (FTIR) was applied and photoluminescence spectroscopy (PL) was used for the analysis of the optical properties of the NPs. Debye Scherer formula was used to estimate the average size of the crystallites which was evaluated about 10nm and 17nm for the green and chemical synthesis respectively. The SEM images revealed that the size of the NPs for the green synthesis was 15-20nm and for the chemical synthesis the NPs, the size was approximately 20-30nm. The FTIR spectra confirmed the existence of the functional groups expected for the both methods. The maximum intensity in Pl profile appeared at wavelength around 398nm both for the green and chemical syntheses. Antibacterial analysis showed that they had a huge impact on pathogenic bacterial species. The minimum inhibitory concentrations of tin oxide NPs (MIC) for standard strains of Staphylococcus aureus ATCC 43300 and Pseudomonas aeruginosa PAO1 are 13.16±0.28µg/ml and 6.41±0.38 C, respectively.