Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films
TiO2 materials are inorganic semi-conductors that experience electron- hole separation when irradiated with UV light (lumbda,<380nm) possessing energy greater than its band gap. This photon- induced charge separation is widely considered to react with ambient oxygen and water to produce reacti...
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| Format: | Thesis |
| Language: | English |
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2010
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| Online Access: | https://hdl.handle.net/10356/41731 |
| _version_ | 1811677834746265600 |
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| author | Toh, Alicia Guek Geok |
| author2 | David Lee Butler |
| author_facet | David Lee Butler Toh, Alicia Guek Geok |
| author_sort | Toh, Alicia Guek Geok |
| collection | NTU |
| description | TiO2 materials are inorganic semi-conductors that experience electron- hole separation
when irradiated with UV light (lumbda,<380nm) possessing energy greater than its band gap. This photon- induced charge separation is widely considered to react with ambient oxygen and water to produce reactive oxygen species (ROS) such as -OH, O2-, ·0, 102 and H2O2. ROS produced on photo-activated TiO2 films undergo reactions with organic compounds to produce
hannless by-products. Concomitant to these photo-sensitized reactions is the UV-induced
super-hydrohilicity of TiO2 surfaces. As such, the photocatalytic and hydrophilic properties of TiO2 films have been utilized in commercial products such as self-cleaning coatings, solar conversion cells and water/air purification reactors. There are several established techniques to produce TiO2 thin films including sol-gel dip
coating, atmospheric chemical vapour deposition (APCVD) and electrophoretic deposition. In terms of cost and energy efficiency, low temperature aqueous electrophoretic deposition provides an attractive alternative to the other techniques. Conventional electrophoretic
deposition (EPD) processes utilize acidic and/or organic suspensions. These acidic and organic EPD suspensions pose environmental problems such as the evolution of volatile organic compounds (VOCs) during EPD and the need for acidic waste disposal after EPD.
In the present work, the electrophoretic deposition of TiO2 films was achieved within a neutral, aqueous and low temperature environment. |
| first_indexed | 2024-10-01T02:43:40Z |
| format | Thesis |
| id | ntu-10356/41731 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:43:40Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/417312023-03-11T17:48:15Z Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films Toh, Alicia Guek Geok David Lee Butler School of Mechanical and Aerospace Engineering DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films TiO2 materials are inorganic semi-conductors that experience electron- hole separation when irradiated with UV light (lumbda,<380nm) possessing energy greater than its band gap. This photon- induced charge separation is widely considered to react with ambient oxygen and water to produce reactive oxygen species (ROS) such as -OH, O2-, ·0, 102 and H2O2. ROS produced on photo-activated TiO2 films undergo reactions with organic compounds to produce hannless by-products. Concomitant to these photo-sensitized reactions is the UV-induced super-hydrohilicity of TiO2 surfaces. As such, the photocatalytic and hydrophilic properties of TiO2 films have been utilized in commercial products such as self-cleaning coatings, solar conversion cells and water/air purification reactors. There are several established techniques to produce TiO2 thin films including sol-gel dip coating, atmospheric chemical vapour deposition (APCVD) and electrophoretic deposition. In terms of cost and energy efficiency, low temperature aqueous electrophoretic deposition provides an attractive alternative to the other techniques. Conventional electrophoretic deposition (EPD) processes utilize acidic and/or organic suspensions. These acidic and organic EPD suspensions pose environmental problems such as the evolution of volatile organic compounds (VOCs) during EPD and the need for acidic waste disposal after EPD. In the present work, the electrophoretic deposition of TiO2 films was achieved within a neutral, aqueous and low temperature environment. MASTER OF ENGINEERING (MAE) 2010-08-05T08:21:57Z 2010-08-05T08:21:57Z 2009 2009 Thesis Toh, A. G. G. (2009). Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/41731 10.32657/10356/41731 en 153 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films Toh, Alicia Guek Geok Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title | Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title_full | Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title_fullStr | Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title_full_unstemmed | Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title_short | Electrophoretic deposition of TIO2 nano-particles : the peroxo-titanium route to fabricating photocatalytic films |
| title_sort | electrophoretic deposition of tio2 nano particles the peroxo titanium route to fabricating photocatalytic films |
| topic | DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films |
| url | https://hdl.handle.net/10356/41731 |
| work_keys_str_mv | AT tohaliciaguekgeok electrophoreticdepositionoftio2nanoparticlestheperoxotitaniumroutetofabricatingphotocatalyticfilms |