Vol. 1, Issue 11 (2016)
Photoluminescence studies of SnO2 nanoparticles synthesized by chemical co-precipitation method: Effect of pH
Author(s): Lakshmi Venkata Kumari P, Harish GS, Sreedhara Reddy P
Abstract: SnO2 nanoparticles were synthesized by using cost-effective chemical co-precipitation method. To study the influence of pH on structural and optical properties of SnO2 nanoparticles, pH value was varied from 7-12. Structural, surface morphology, chemical analysis and luminescence properties of prepared SnO2 nanoparticles were studied by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) attached with energy dispersive spectroscopy (EDS) and photoluminescence studies (PL). X-ray diffraction study reveals the nano-size particle distribution of the samples with tetragonal rutile structure in the range of 2 to 4 nm. FTIR spectra show the structural confirmation of SnO2 nanoparticles. Various PL signals were observed in the visible region around 400 to 600 nm due to oxygen vacancies and interfacial Sn vacancies present in the prepared nanosamples.