Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance

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

研究成果: 雜誌貢獻文章同行評審

42 引文 斯高帕斯(Scopus)

摘要

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.
原文英語
頁(從 - 到)167-174
頁數8
期刊Thin Solid Films
528
DOIs
出版狀態已發佈 - 1月 15 2013
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 表面和介面
  • 表面、塗料和薄膜
  • 金屬和合金
  • 材料化學

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