High-Efficiently Photoelectrochemical Hydrogen Production over Zn-Incorporated TiO2 Nanotubes

Title
High-Efficiently Photoelectrochemical Hydrogen Production over Zn-Incorporated TiO2 Nanotubes
Author(s)
강미숙이가영[이가영]여민경[여민경]엄명헌[엄명헌]
Keywords
VISIBLE-LIGHT IRRADIATION; PORE-SIZE DISTRIBUTION; WATER; PHOTOCATALYST; NANOPARTICLES; FABRICATION; GENERATION
Issue Date
201207
Publisher
HINDAWI PUBLISHING CORPORATION
Citation
INTERNATIONAL JOURNAL OF PHOTOENERGY
Abstract
To investigate the Zn dopant and nanotube morphology effects of TiO2 in electrochemical hydrogen production from the photo-splitting of methanol/water solution, we have designed a Zn-incorporated TiO2 nanotube (Zn-TNT) photocatalyst. The TNT and Zn-TNT materials had a width of 70 similar to 100 nm. The hydrogen production over the Zn-TNT photocatalysts was higher than that over the TNT; specifically, 10.2 mL of H-2 gas was produced after 9 hours when 0.5 g of 0.01 mol% Zn-TNT was used. The zeta-potential values in aqueous solution determined by electrophoretic light scattering (ELS) had negative surface charges, which was related to the surface stability, and the absolute value was the largest in 0.01 mol% Zn-TNT. On the basis of UV-visible and photoluminescence (PL) spectra results, the high photoactivity of Zn-TNT was attributed to the shift toward the visible region and increase of PL intensity due to the increased number of excited electrons and holes.
URI
http://hdl.handle.net/YU.REPOSITORY/27684http://dx.doi.org/10.1155/2012/843042
ISSN
1110-662X
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이과대학 > 화학생화학부 > Articles
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