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Effect of morphology on the solar photocatalytic behavior of ZnO nanostructures

Mohajerani, M ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2009.06.054
  3. Publisher: 2009
  4. Abstract:
  5. ZnO nanostructures in the shape of particle, rods, flower-like and micro-sphere were synthesized via facile hydrothermal methods and the effect of morphology on the decolorization of CI Acid Red 27 solution under direct irradiation of sunlight was investigated. XRD patterns showed that the synthesized nanostructures have Wurtzite-type hexagonal structure with high crystallinity and crystallite size in the range of 67-100 nm. UV-vis absorption spectra indicated that the ZnO nanorods have higher visible light harvesting as compared to the other morphologies. The decolorization obeys the first order kinetics rate with the kinetics constant of 4.5-19.5 × 10-3 min-1 dependent on the ZnO morphology and surface area. © 2009 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Acid red 27 ; Chemical synthesis ; Direct irradiation ; First order kinetics ; Flower-like ; High crystallinity ; Hydrothermal methods ; Photo-catalytic ; SEM ; Surface area ; UV-VIS absorption spectra ; Visible light ; Wurtzite-type hexagonal structure ; XRD patterns ; ZnO ; ZnO nanorod ; ZnO nanostructures ; Azo dyes ; Catalysis ; Crystallite size ; Morphology ; Nanorods ; Nanostructured materials ; Scanning electron microscopy ; Semiconducting zinc compounds ; Ultraviolet spectroscopy ; Zinc oxide ; Zinc sulfide ; Synthesis (chemical)
  8. Source: Journal of Alloys and Compounds ; Volume 485, Issue 1-2 , 2009 , Pages 616-620 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838809011864