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Simple method to synthesize NaxWO3 nanorods and nanobelts

Azimirad, R ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1021/jp902189h
  3. Publisher: 2009
  4. Abstract:
  5. A simple method for synthesis of NaxWO3 nanorods and nanobelts on sputtered tungsten films by using sodium in soda lime substrate as the catalyst was reported for the first time. After thermally post annealing thin films in a temperature range of 600-750 °C in N2 ambient for 80 min, crystalline NaxWO3 nanorods and nanobelts with [001] direction were formed depending on the annealing temperature. Experimental results reveal that the annealing temperature at 700 °C is the optimum temperature for the growth of sodium-doped tungsten oxide nanorods with maximum density on the surface. According to scanning electron microscopic observations, the synthesized nanorods are ∼50 nm in width and a few micrometers in length at the optimum temperature. It was also observed that increasing annealing temperature facilitates the growth of the NaxWO3 nanobelts. A solid-liquid-solid mechanism was proposed for describing the growth process of the sodiumdoped tungsten oxide nanorods and nanobelts. © 2009 American Chemical Society
  6. Keywords:
  7. Annealing temperatures ; Growth process ; Maximum density ; Optimum temperature ; Post annealing ; Scanning electron microscopic ; SIMPLE method ; Soda lime ; Solid-liquid-solid mechanisms ; Temperature range ; Tungsten films ; Tungsten oxide ; Annealing ; Nanobelts ; Oxides ; Sodium ; Synthesis (chemical) ; Tungsten ; Tungsten compounds ; Nanorods
  8. Source: Journal of Physical Chemistry C ; Volume 113, Issue 30 , 2009 , Pages 13098-13102 ; 19327447 (ISSN)
  9. URL: https://pubs.acs.org/doi/full/10.1021/jp902189h