Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies
Highly ordered titanium dioxide nanotubes (TiO<sub>2</sub> NTs) were fabricated through anodization and tested for their applicability as model electrodes in electrosorption studies. The crystalline structure of the TiO<sub>2</sub> NTs was changed without modifying the nanost...
| Main Authors: | , , , , , , |
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute
2018
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| Online Access: | http://hdl.handle.net/1721.1/116618 |
| _version_ | 1826214081043890176 |
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| author | Li, Xian Pustulka, Samantha Pedu, Scott Xue, Yuan Richter, Christiaan Taboada-Serrano, Patricia Close, Thomas Charles |
| author2 | Close, Thomas Charles |
| author_facet | Close, Thomas Charles Li, Xian Pustulka, Samantha Pedu, Scott Xue, Yuan Richter, Christiaan Taboada-Serrano, Patricia Close, Thomas Charles |
| author_sort | Li, Xian |
| collection | MIT |
| description | Highly ordered titanium dioxide nanotubes (TiO<sub>2</sub> NTs) were fabricated through anodization and tested for their applicability as model electrodes in electrosorption studies. The crystalline structure of the TiO<sub>2</sub> NTs was changed without modifying the nanostructure of the surface. Electrosorption capacity, charging rate, and electrochemical active surface area of TiO<sub>2</sub> NTs with two different crystalline structures, anatase and amorphous, were investigated via chronoamperometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The highest electrosorption capacities and charging rates were obtained for the anatase TiO<sub>2</sub> NTs, largely because anatase TiO<sub>2</sub> has a reported higher electrical conductivity and a crystalline structure that can potentially accommodate small ions within. Both electrosorption capacity and charging rate for the ions studied in this work follow the order of Cs<sup>+</sup> > Na<sup>+</sup> > Li<sup>+</sup>, regardless of the crystalline structure of the TiO<sub>2</sub> NTs. This order reflects the increasing size of the hydrated ion radii of these monovalent ions. Additionally, larger effective electrochemical active surface areas are required for larger ions and lower conductivities. These findings point towards the fact that smaller hydrated-ions experience less steric hindrance and a larger comparative electrostatic force, enabling them to be more effectively electrosorbed. |
| first_indexed | 2024-09-23T15:59:31Z |
| format | Article |
| id | mit-1721.1/116618 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:59:31Z |
| publishDate | 2018 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1166182022-10-02T05:35:41Z Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies Li, Xian Pustulka, Samantha Pedu, Scott Xue, Yuan Richter, Christiaan Taboada-Serrano, Patricia Close, Thomas Charles Close, Thomas Charles Highly ordered titanium dioxide nanotubes (TiO<sub>2</sub> NTs) were fabricated through anodization and tested for their applicability as model electrodes in electrosorption studies. The crystalline structure of the TiO<sub>2</sub> NTs was changed without modifying the nanostructure of the surface. Electrosorption capacity, charging rate, and electrochemical active surface area of TiO<sub>2</sub> NTs with two different crystalline structures, anatase and amorphous, were investigated via chronoamperometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The highest electrosorption capacities and charging rates were obtained for the anatase TiO<sub>2</sub> NTs, largely because anatase TiO<sub>2</sub> has a reported higher electrical conductivity and a crystalline structure that can potentially accommodate small ions within. Both electrosorption capacity and charging rate for the ions studied in this work follow the order of Cs<sup>+</sup> > Na<sup>+</sup> > Li<sup>+</sup>, regardless of the crystalline structure of the TiO<sub>2</sub> NTs. This order reflects the increasing size of the hydrated ion radii of these monovalent ions. Additionally, larger effective electrochemical active surface areas are required for larger ions and lower conductivities. These findings point towards the fact that smaller hydrated-ions experience less steric hindrance and a larger comparative electrostatic force, enabling them to be more effectively electrosorbed. 2018-06-26T14:54:03Z 2018-06-26T14:54:03Z 2018-06 2018-04 2018-06-25T07:43:09Z Article http://purl.org/eprint/type/JournalArticle 2079-4991 http://hdl.handle.net/1721.1/116618 LI, Xian, Samantha Pustulka, Scott Pedu, Thomas Close, Yuan Xue, Christiaan Richter and Patricia Taboada-Serrano. "Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies." Nanomaterials, 2018, 8(6), 404. http://dx.doi.org/10.3390/nano8060404 Nanomaterials Creative Commons Attribution application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Li, Xian Pustulka, Samantha Pedu, Scott Xue, Yuan Richter, Christiaan Taboada-Serrano, Patricia Close, Thomas Charles Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title | Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title_full | Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title_fullStr | Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title_full_unstemmed | Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title_short | Titanium Dioxide Nanotubes as Model Systems for Electrosorption Studies |
| title_sort | titanium dioxide nanotubes as model systems for electrosorption studies |
| url | http://hdl.handle.net/1721.1/116618 |
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