Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures
In recent years, the demand for mesoporous metal oxides have been on the rise to cater to various applications such as photovoltaics, carbon capture and energy storage. While various synthesis methods have been explored, evaporation-induced self-assembly method is the still most versatile for the co...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2020
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| Online Access: | https://hdl.handle.net/10356/139014 |
| _version_ | 1811695927622107136 |
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| author | Ong, Victoria Kai Ting |
| author2 | Tan Kwan Wee |
| author_facet | Tan Kwan Wee Ong, Victoria Kai Ting |
| author_sort | Ong, Victoria Kai Ting |
| collection | NTU |
| description | In recent years, the demand for mesoporous metal oxides have been on the rise to cater to various applications such as photovoltaics, carbon capture and energy storage. While various synthesis methods have been explored, evaporation-induced self-assembly method is the still most versatile for the controlled generation of well-ordered mesoporous metal oxides. We report a modified form of evaporation induced self-assembly process employing Pluronic F127 triblock copolymer as structure director of titanium oxide sol nanoparticles. The hybrid materials were characterized by a combination of small-angle X-ray scattering and optical microscopy. We found that the optimal evaporation duration was 24 hours, enabling the formation of a homogeneous monolith with ordered hybrid mesostructure consistent to the hexagonal morphology. Reducing the solvent evaporation duration to 6 hours induced spinodal decomposition, yielding a hierarchical and disordered hybrid mesostructure. Such hierarchical mesoporous titanium oxide structures with high flux and pore accessibility may be beneficial for catalysis and membrane separation. |
| first_indexed | 2024-10-01T07:31:15Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/139014 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:31:15Z |
| publishDate | 2020 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1390142023-03-04T15:47:49Z Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures Ong, Victoria Kai Ting Tan Kwan Wee School of Materials Science and Engineering kwtan@ntu.edu.sg Engineering::Materials In recent years, the demand for mesoporous metal oxides have been on the rise to cater to various applications such as photovoltaics, carbon capture and energy storage. While various synthesis methods have been explored, evaporation-induced self-assembly method is the still most versatile for the controlled generation of well-ordered mesoporous metal oxides. We report a modified form of evaporation induced self-assembly process employing Pluronic F127 triblock copolymer as structure director of titanium oxide sol nanoparticles. The hybrid materials were characterized by a combination of small-angle X-ray scattering and optical microscopy. We found that the optimal evaporation duration was 24 hours, enabling the formation of a homogeneous monolith with ordered hybrid mesostructure consistent to the hexagonal morphology. Reducing the solvent evaporation duration to 6 hours induced spinodal decomposition, yielding a hierarchical and disordered hybrid mesostructure. Such hierarchical mesoporous titanium oxide structures with high flux and pore accessibility may be beneficial for catalysis and membrane separation. Bachelor of Engineering (Materials Engineering) 2020-05-14T12:00:42Z 2020-05-14T12:00:42Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/139014 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials Ong, Victoria Kai Ting Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title | Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title_full | Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title_fullStr | Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title_full_unstemmed | Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title_short | Time controlled synthesis of block copolymer-directed titanium dioxide mesostructures |
| title_sort | time controlled synthesis of block copolymer directed titanium dioxide mesostructures |
| topic | Engineering::Materials |
| url | https://hdl.handle.net/10356/139014 |
| work_keys_str_mv | AT ongvictoriakaiting timecontrolledsynthesisofblockcopolymerdirectedtitaniumdioxidemesostructures |