Nanostructures Synthesized Via Hydrothermal Method
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Date
2018
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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.
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Nurul Norfarina Binti Hasbullah, TA 418 .N35 N8 2018