Synthesis, Optical, Electrical And Catalytic Properties Of Titanium-Based Oxides Materials And Their Sodium-Doped Derivatives
Barium titanat (BaTiO3) dan barium nikel titanat (Ba2NiTi5O13) telah disintesis melalui kaedah sol-gel. Mekanisma pembentukan BaTiO3 dan Ba2NiTi5O13 telah dicadangkan. Kesan pengedopan natrium (Na) pada komposisi struktur dan morfologi permukaan bagi 3 oksida berasas titanium iaitu titanium dioks...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://eprints.usm.my/32027/1/CHEW_KER_YIN_24%28NN%29.pdf |
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| Summary: | Barium titanat (BaTiO3) dan barium nikel titanat (Ba2NiTi5O13) telah disintesis
melalui kaedah sol-gel. Mekanisma pembentukan BaTiO3 dan Ba2NiTi5O13 telah
dicadangkan. Kesan pengedopan natrium (Na) pada komposisi struktur dan morfologi
permukaan bagi 3 oksida berasas titanium iaitu titanium dioksida (TiO2), BaTiO3 and
Ba2NiTi5O13 telah dikaji. Struktur-struktur fasa TiO2, BaTiO3 dan Ba2NiTi5O13 iaitu
anatase, kubik dan monoklinik, masing-masing dikekalkan selepas pengedopan Na.
Ini menunjukkan bahawa penggantian atom Na pada atom Ti adalah satu fenomena
permukaan. Transformasi morfologi zarah-zarah pengedop-Na BaTiO3 telah
diperhatikan. Penunjuk Hammett menunjukkan bahawa pengedop-Na Ba2NiTi5O13
mempunyai kebesan yang tertinggi. Daripada hasil analisa BET, pengedop-Na
Ba2NiTi5O13 menunjukkan luas permukaan spesifik yang tertinggi berbanding dengan
pengedop-Na BaTiO3 dan pengedop-Na TiO2. Aplikasi oksida berasas titanium
tersebut sebagai pengisi dalam polivinil alkohol (PVA) telah dikaji.
Barium titanate (BaTiO3) and barium nickel titanate (Ba2NiTi5O13) were
synthesized via sol-gel method. Mechanism of formation of BaTiO3 and Ba2NiTi5O13
was proposed. The effect of Na doping on structural composition and surface
morphology of 3 titanium-based oxides (i.e. titanium dioxide (TiO2), BaTiO3 and
Ba2NiTi5O13) were investigated. The phase structures of TiO2, BaTiO3 and
Ba2NiTi5O13 i.e. anatase, cubic and monoclinic respectively were sustained after Na
doping. This indicates that the substitution of Na on Ti atom was a surface
phenomenon. The morphology transformation of Na-doped BaTiO3 particles was
observed. Hammett indicator showed that the Na-doped Ba2NiTi5O13 has the highest
basicity. From BET result, the Na-doped Ba2NiTi5O13 showed the largest specific
surface area as compared to Na-doped BaTiO3 and Na-doped TiO2. The application of
these titanium-based oxides as the fillers in polyvinyl alcohol (PVA) was investigated. |
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