Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation
This PhD thesis primarily involved the hierarchical assembly of immobilized TiO2-based epitaxial crystalline thin film photocatalysts that are anchored and grown directly from crystalline Ti substrates. The synthesized novel photocatalysts featuring various nanostructures presented herein include na...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/51037 |
| _version_ | 1811686821034196992 |
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| author | Ng, Jiawei |
| author2 | Sun Delai, Darren |
| author_facet | Sun Delai, Darren Ng, Jiawei |
| author_sort | Ng, Jiawei |
| collection | NTU |
| description | This PhD thesis primarily involved the hierarchical assembly of immobilized TiO2-based epitaxial crystalline thin film photocatalysts that are anchored and grown directly from crystalline Ti substrates. The synthesized novel photocatalysts featuring various nanostructures presented herein include nanotubes, nanowhiskers, nanowires, nanofungus and nanocubes. The different morphologies have imparted various functionalities and also tailor surface- and shaped-induced properties of semiconductor nanocrystalline phase. The increased surface area and reactive sites also resulted in a consistently higher activity for surface-based processes such as heterogeneous photocatalysis. The developed photocatalysts were employed to degrade recalcitrant, emerging contaminants and pathogens that are commonly present in water bodies (AO7, E. coli cells and BPA) via production of photogenerated holes and oxidative radicals. The free electrons produced from photocatalytic reduction half-reactions are harvested and utilized for the reduction of hydroxide ions present in the treated water to generate hydrogen gas, a source of clean energy. |
| first_indexed | 2024-10-01T05:06:30Z |
| format | Thesis |
| id | ntu-10356/51037 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:06:30Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/510372023-03-03T19:19:57Z Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation Ng, Jiawei Sun Delai, Darren School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering::Water treatment This PhD thesis primarily involved the hierarchical assembly of immobilized TiO2-based epitaxial crystalline thin film photocatalysts that are anchored and grown directly from crystalline Ti substrates. The synthesized novel photocatalysts featuring various nanostructures presented herein include nanotubes, nanowhiskers, nanowires, nanofungus and nanocubes. The different morphologies have imparted various functionalities and also tailor surface- and shaped-induced properties of semiconductor nanocrystalline phase. The increased surface area and reactive sites also resulted in a consistently higher activity for surface-based processes such as heterogeneous photocatalysis. The developed photocatalysts were employed to degrade recalcitrant, emerging contaminants and pathogens that are commonly present in water bodies (AO7, E. coli cells and BPA) via production of photogenerated holes and oxidative radicals. The free electrons produced from photocatalytic reduction half-reactions are harvested and utilized for the reduction of hydroxide ions present in the treated water to generate hydrogen gas, a source of clean energy. DOCTOR OF PHILOSOPHY (ENV.SC. and ENG.) 2013-01-03T03:22:17Z 2013-01-03T03:22:17Z 2012 2012 Thesis Ng, J. (2012). Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/51037 10.32657/10356/51037 en 233 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Water treatment Ng, Jiawei Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title | Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title_full | Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title_fullStr | Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title_full_unstemmed | Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title_short | Hierarchical assembly of immobilized TiO2-based nanostructured epitaxial films on Ti Substrates for photocatalytic water decontamination and hydrogen generation |
| title_sort | hierarchical assembly of immobilized tio2 based nanostructured epitaxial films on ti substrates for photocatalytic water decontamination and hydrogen generation |
| topic | DRNTU::Engineering::Environmental engineering::Water treatment |
| url | https://hdl.handle.net/10356/51037 |
| work_keys_str_mv | AT ngjiawei hierarchicalassemblyofimmobilizedtio2basednanostructuredepitaxialfilmsontisubstratesforphotocatalyticwaterdecontaminationandhydrogengeneration |