Wetting and Photocatalytic Behavior of Two-Dimensional Tin Oxides

Abstract

Among the variety of two-dimensional oxides, tin oxides semiconducting are particularly interesting because of their promising in catalyst, energy harvesting, water purification, electronics device and space applications. In this study, three synthesized methods use adopted to explore the properties and application of oxides of tin sheets. The methods are air oxidation, aqueous and non-aqueous which characterized through techniques such as SEM-EDS, UV -spectroscopy, X ray diffraction, FTIR and photoluminescence. From SEM image showed the morphology of the tin oxide materials. The percentage of tin and oxygen from elemental analysis was ~ 55 % and 44 % respectively. FTIR spectra confirmed that Sn-O functional from the vibration peak. The X- ray diffraction pattern shows that prominent diffraction peak which indicates formation of tin oxide crystallinity. A photoabsorbtiy activity was tested in the tin oxide sample with methylene blue to explore how the tin oxide surface featured absorbs the integrity of a dye. Porosity and a surface alteration resulted in a increase in photoactivity. The tin oxide sheets emit green fluorescence in the UV light and emission might be dependent on the number of layers and concentration of it. The water droplet contact angle measure on the tin oxide sheets which is experimentally observed 69°. The theoretically molecular dynamics-based contact angle measurement was also studied on monolayer of stannous oxide, stannic oxide with effect of substrate. Based on above results, this material can be utilized as a photo-catalyst, drug delivery and thin film application of solar cell.