Comparative study of nano-sized Al2O3 powder synthesized by sol-gel (citric and stearic acid) and aldo-keto gel method

摘要

Inorganic Al2O3 nano-powders were synthesized by citric acid sol-gel, stearic acid sol-gel and aldo-keto gel method. The prepared samples were characterized by X-ray powder diffraction (XRD) for structural studies and the average particle size was calculated by Debye-Scherrer formula. The optical investigation was done through UV-vis and FL spectra analysis. The florescence properties were studied by fluorescence spectrophotometer (F-7000), indicating the emission of radiation of 397, 399, 401 nm by stearic acid sol-gel, aldo-keto gel and citric acid sol-gel method respectively, when nano powder absorbed UV radiation at 224 nm. However, it is found that blue shift in band gap was observed in stearic acid sol-gel, aldo-keto gel and citric acid sol-gel method respectively. (C) 2018 Elsevier GmbH. All rights reserved.