Abstract
Hierarchical thin-film photocatalysts exhibiting surface roughness at two length scales were prepared by the consecutive formation of ZnO microstripes and ZnO nanorod-array. ZnO stripes with microscale roughness were fabricated after removing the ink-jet printed ribs. Then, nanoscale roughness was achieved by the growth of ZnO nanorods on the surface. The surface morphology and structural and optical properties were characterized by FESEM, X-ray diffraction, XPS, photoluminescence and UV-vis spectroscopy. The photocurrents of selectively grown ZnO nanorods under UV or visible light irradiation were investigated by scanning electrochemical microscopy with a scanning optical fiber. The surface comprising hierarchical microstructures and nanostructures not only increases the surface area of the photocatalyst but also helps the diffusion of organic dye during the photodegradation test. The photodegradation efficiency of the hierarchical thin-film photocatalyst was improved compared with the ZnO nanorod photocatalyst. Photocatalytic performance was further enhanced when Ag nanoparticles were deposited on the hierarchical photocatalyst.
| Original language | English |
|---|---|
| Pages (from-to) | 167-174 |
| Number of pages | 8 |
| Journal | Thin Solid Films |
| Volume | 528 |
| DOIs | |
| Publication status | Published - Jan 15 2013 |
| Externally published | Yes |
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Keywords
- Barrier
- Hierarchical
- Ink-jet print
- Photocatalyst
- ZnO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Metals and Alloys
- Surfaces, Coatings and Films
- Surfaces and Interfaces
Cite this
Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance. / Chang, Chi Jung; Hsu, Mu Hsiang; Weng, Yu Ching; Tsay, Chien Yie; Lin, Chung Kwei.
In: Thin Solid Films, Vol. 528, 15.01.2013, p. 167-174.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance
AU - Chang, Chi Jung
AU - Hsu, Mu Hsiang
AU - Weng, Yu Ching
AU - Tsay, Chien Yie
AU - Lin, Chung Kwei
PY - 2013/1/15
Y1 - 2013/1/15
N2 - Hierarchical thin-film photocatalysts exhibiting surface roughness at two length scales were prepared by the consecutive formation of ZnO microstripes and ZnO nanorod-array. ZnO stripes with microscale roughness were fabricated after removing the ink-jet printed ribs. Then, nanoscale roughness was achieved by the growth of ZnO nanorods on the surface. The surface morphology and structural and optical properties were characterized by FESEM, X-ray diffraction, XPS, photoluminescence and UV-vis spectroscopy. The photocurrents of selectively grown ZnO nanorods under UV or visible light irradiation were investigated by scanning electrochemical microscopy with a scanning optical fiber. The surface comprising hierarchical microstructures and nanostructures not only increases the surface area of the photocatalyst but also helps the diffusion of organic dye during the photodegradation test. The photodegradation efficiency of the hierarchical thin-film photocatalyst was improved compared with the ZnO nanorod photocatalyst. Photocatalytic performance was further enhanced when Ag nanoparticles were deposited on the hierarchical photocatalyst.
AB - Hierarchical thin-film photocatalysts exhibiting surface roughness at two length scales were prepared by the consecutive formation of ZnO microstripes and ZnO nanorod-array. ZnO stripes with microscale roughness were fabricated after removing the ink-jet printed ribs. Then, nanoscale roughness was achieved by the growth of ZnO nanorods on the surface. The surface morphology and structural and optical properties were characterized by FESEM, X-ray diffraction, XPS, photoluminescence and UV-vis spectroscopy. The photocurrents of selectively grown ZnO nanorods under UV or visible light irradiation were investigated by scanning electrochemical microscopy with a scanning optical fiber. The surface comprising hierarchical microstructures and nanostructures not only increases the surface area of the photocatalyst but also helps the diffusion of organic dye during the photodegradation test. The photodegradation efficiency of the hierarchical thin-film photocatalyst was improved compared with the ZnO nanorod photocatalyst. Photocatalytic performance was further enhanced when Ag nanoparticles were deposited on the hierarchical photocatalyst.
KW - Barrier
KW - Hierarchical
KW - Ink-jet print
KW - Photocatalyst
KW - ZnO
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U2 - 10.1016/j.tsf.2012.09.083
DO - 10.1016/j.tsf.2012.09.083
M3 - Article
VL - 528
SP - 167
EP - 174
JO - Thin Solid Films
JF - Thin Solid Films
SN - 0040-6090
ER -