Please use this identifier to cite or link to this item: http://umt-ir.umt.edu.my:8080/handle/123456789/13399
Title: Nanostructures Synthesized Via Hydrothermal Method
Authors: Nurul Norfarina Binti Hasbullah
Keywords: Nurul Norfarina Binti Hasbullah
TA 418 .N35 N8 2018
Issue Date: 2018
Publisher: Universiti Malaysia Terengganu
Abstract: One of free-lead materials which is morphology can be controlled with narrow size distribution is BaTiO3. In this work, BaTiO3 nanostructures were synthesized through hydrothermal method. Hydrothermal method is a simple and low cost method temperatures for materials synthesis. Three different molar ratios of Ba(OH)2 : tertbutylamine:oleicacid,specifically (1:2:2), (1:3:3) and (1:8:8) are varied to synthesis BaTiO3 nanopowders. The as-synthesis powders obtained from the hydrothermal process were calcined at temperature 500 °C to 1000 °C. These calcinationtemperatures were selected from the decomposition properties as shown on the thermogravimetric (TGA) analysis. Then, the powders prepared using the ratio (1:8:8) was chosen to further study in the form of the films because this molar ratio is the best combination to prepare BaTiO3 nanocubes. BaTiO3 (1:8:8) the thin films were fabricated using drop casting method and were heated at 550 °C for 4 hours. The phase formation and morphology of the samples were studied using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The optical characterization of the samples was determined using UV-Vis spectroscopy (UV-Vis) and Photoluminescence spectroscopy (PL). When the calcination temperatures increase from 500 °C to 1000 °C, the XRD data shows BaTiO3 exhibited structural transition from cubic to tetragonal.
URI: http://umt-ir.umt.edu.my:8080/xmlui/handle/123456789/13399
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