Bulletin of Trends in Chemical Sciences

Scibay Publications, Rathinam Jayaseelan, M Gopalakrishnan
2016 608002, Tamilnadu, India   unpublished
SnO2 and Ag doped SnO2 nanoparticles were fabricated by ultrasonic assisted co-precipitation method and nanoparticles were successfully characterized by FT-IR, XRD, SEM, EDX and UV-Vis Spectroscopy. It can be seen from XRD results that the average crystalline size of metal oxides is ranging from 13 to 32 nm. The presences of Sn-O bond in metal oxide were observed from FT-IR measurements. Effect of silver nanoparticles on band gap changes for nano crystalline SnO2 were also investigated. This
more » ... vestigated. This was done by finding the optical band gap from the absorption edge determined from UV measurement. These results showed a lowering of the band gap in nano crystalline Ag-SnO2.These lower values help to explain the lower room temperature gas sensor behavior of the nanomaterial. XRD results suggest that the introduction of Ag in metal oxides and composites can increase the crystallinity of metal oxides average crystalline size of nanoparticles. EDX spectrum shows the purity of the Ag doped SnO2 nanoparticles.