Loading...

Improvement in TiO2 photocatalytic performance by ZrO2 nanocompositing and immobilizing

Koohestani, H ; Sharif University of Technology | 2016

548 Viewed
  1. Type of Document: Article
  2. DOI: 10.1080/19443994.2016.1183233
  3. Publisher: Taylor and Francis Inc , 2016
  4. Abstract:
  5. In this work, the effect of addition of ZrO2 to TiO2 and catalyst geometry on photocatalytic properties of the nanocomposite TiO2/ZrO2 was investigated. The traditional use of powdery photocatalyst for the degradation of organic compounds has post-treatment problems which means much higher time and costs. A novel method to minimize these problems is immobilization by insertion onto an inert substrate. Several geometries of TiO2–10%ZrO2 (T-10Z) nano-photocatalysts (powder, fiber, film, and network-shaped) were produced using different templates. The products were characterized by X-ray diffraction, field emission scanning electron microscopy, Brunauer–Emmett–Teller, and diffuse reflectance UV–vis spectra. Photocatalytic degradation of methyl orange in water was examined using TiO2/ZrO2 composites and T-10Z geometries under UV irradiation. The T-10Z with a band gap of 3.10 eV showed higher degradation than the other composites. The degradation rate of the four geometries produced was in the following order: powder > network > film > fiber. The rate constant of the dye degradation reaction when contacting with powdery and network composites were 0.019 and 0.013 min−1, respectively. Network geometry with lower kinetic effects was preferred due to its indisputably higher immobility
  6. Keywords:
  7. Dye degradation ; Immobilized photocatalyst ; Microfiber ; Network structure ; TiO2/ZrO2 composite
  8. Source: Desalination and Water Treatment ; Volume 57, Issue 58 , 2016 , Pages 28450-28459 ; 19443994 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/19443994.2016.1183233?journalCode=tdwt20