Fabrication of TiO2 nanotubes by atomic layer deposition and their photocatalytic and photoelectrochemical applications |
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Authors: | Wang Chih-Chieh Kei Chi-Chung Perng Tsong-Pyng |
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Affiliation: | Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan. |
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Abstract: | The formation of TiO(2) nanotubes was conducted by atomic layer deposition (ALD) with tris-(8-hydroxyquinoline) gallium (GaQ(3)) nanowires as a template at different substrate temperatures, 50, 100, and 200?°C. TiO(2) nanotubes were formed only at 50 and 100?°C. Although a higher growth rate at 50?°C was observed, nanotubes with better uniformity, conformality, and less residual chloride were obtained at 100?°C because of a different formation mechanism. A photocatalysis test of TiO(2) nanotubes prepared by different cycle numbers at 100?°C was conducted. It showed that TiO(2) nanotubes prepared by 400 cycles of ALD and treated at 700?°C for 1 h to form anatase phase had the best photocatalytic performance. Compared with P-25, the nanotubes showed higher photocatalytic degradation of rhodamine B and water splitting efficiency. |
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