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MWCNT/WO3 nanocomposite photoanode for visible light induced water splitting

Yousefzadeh, S ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jssc.2013.06.017
  3. Publisher: 2013
  4. Abstract:
  5. The Multi-walled carbon nanotube (MWCNT)/WO3 nanocomposite thin films with different MWCNT's weight percentages were prepared by sol-gel method as visible light induced photoanode in water splitting reaction. Weight percentage of MWCNT in the all nanocomposite thin films was confirmed by TGA/DSC analysis. According to XPS analysis, oxygenated groups at the surface of the MWCNT and stoichiometric formation of WO3 thin films were determined, while the crystalline structure of the nanocomposite samples was studied by XRD indicating (0 0 2) peak of MWCNT in the monoclinic phase of WO3. The influence of different weight percentage (wt%) of MWCNT on WO3 photoactivity showed that the electron conductivity, charge transfer and electron life time had improved as compared with the pure WO3. Based on linear sweep voltammetry and chronoamperometry measurements, the (1 wt%) MWCNT/WO3 nanocomposite thin films photoanode has a maximum photocurrent density of ~4.5 A/m2 and electron life time of about 57 s
  6. Keywords:
  7. Electron life time ; Functionalized MWCNT ; WO3 thin film ; Electron conductivity ; Life-times ; Linear sweep voltammetry ; Nanocomposite samples ; Nanocomposite thin films ; Photoelectrochemical performance ; Water splitting reactions ; Chronoamperometry ; Electrons ; Nanocomposite films ; Nanocomposites ; Sol-gel process ; Thin films ; Multiwalled carbon nanotubes (MWCN)
  8. Source: Journal of Solid State Chemistry ; Volume 204 , 2013 , Pages 341-347 ; 00224596 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0022459613003095