Simultaneous copper ion removal and hydrogen production from water over a TiO2 nanotube photocatalyst
A one-dimensioal (1-D) mesoporous TiO2 nanotube (TiNT) was successfully synthesized by hydrothermal-calcination process, and employed in simultaneous photocatalytic Cu2+ removal and H2 production. Under irradiation, Cu2+ in wide concentration range of 8-800 ppm, could be reduced rapidly, and the red...
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| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/93624 http://hdl.handle.net/10220/7679 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | A one-dimensioal (1-D) mesoporous TiO2 nanotube (TiNT) was successfully synthesized by hydrothermal-calcination process, and employed in simultaneous photocatalytic Cu2+ removal and H2 production. Under irradiation, Cu2+ in wide concentration range of 8-800 ppm, could be reduced rapidly, and the reduction was not severely impacted by co-existing inorganic ions in solution. Simultaneous with Cu2+ reduction, noticeable H2 was produced over the in-situ fabricated Cu incorporated TiNT (Cu-TiNT) photocatalyst, while H2 evolution rate was controlled by Cu2+ reduction process, due to competition of electrons between protons and Cu2+. In addition, H2 generation activity of Cu-TiNT depended on initial Cu2+/Ti ratio, and could be depressed by co-existing ions in solution. Fast Cu2+ reduction and remarkable H2 evolution confirmed the feasibility of simultaneous Cu2+ removal and H2 production over TiNT photocatalyst. |
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