Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance

Chi Jung Chang, Mu Hsiang Hsu, Yu Ching Weng, Chien Yie Tsay, Chung Kwei Lin

Research output: Contribution to journalArticle

34 Citations (Scopus)

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 languageEnglish
Pages (from-to)167-174
Number of pages8
JournalThin Solid Films
Volume528
DOIs
Publication statusPublished - Jan 15 2013
Externally publishedYes

Fingerprint

Photocatalysts
Nanorods
nanorods
Surface roughness
Photodegradation
roughness
scanning
inks
Scanning
thin films
Thin films
microbalances
photocurrents
surface roughness
Ultraviolet spectroscopy
Photocurrents
Ink
optical fibers
dyes
Surface morphology

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 journalArticle

Chang, Chi Jung ; Hsu, Mu Hsiang ; Weng, Yu Ching ; Tsay, Chien Yie ; Lin, Chung Kwei. / Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance. In: Thin Solid Films. 2013 ; Vol. 528. pp. 167-174.
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