%0 Journal Article %T Role of pH in the hydrothermal synthesis of phase pure alpha Bi<sub>2</sub>O<sub>3</sub> nanoparticles and its structural characterization %J Advanced Materials Proceedings %I International Association of Advanced Materials %Z 2002-4428 %A Malligavathy, M. %A Pathinettam Padiyan, D. %D 2017 %\ 01/01/2017 %V 2 %N 1 %P 51-55 %! Role of pH in the hydrothermal synthesis of phase pure alpha Bi<sub>2</sub>O<sub>3</sub> nanoparticles and its structural characterization %K α-Bismuth oxide %K hydrothermal method %K structural properties %K X-ray diffraction %K Raman spectroscopy %R 10.5185/amp.2017/112 %X Phase pure bismite nanoparticles were successfully prepared by means of hydrothermal method by varying the precursor solution pH from 10 to 13. The as-prepared nanoparticles were characterized by different techniques such as X-ray diffraction pattern (XRD), Raman spectroscopy, Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDX).&nbsp; The effects of pH on the structural properties of these nanoparticles were corroborated using XRD and Raman spectrum.&nbsp; From the XRD pattern it is found that all the samples are polycrystalline in nature and the Raman spectra are used to confirm the phase transformation of the Bi2O3 nanoparticles.&nbsp; At the low pH value, the SEM image reveals that as-prepared samples are homogeneous with particle size of ~ 25 nm and with the increase in the pH value spherical particle forms uniform blocks like morphology for both the samples prepared at the pH 12 and 13. Copyright &copy; 2017 VBRI Press. %U https://amp.iaamonline.org/article_16198_336f2ea0284449810278bf763b5e7e2a.pdf