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    STUDIA CHEMIA - Ediţia nr.2 din 2007  
         
  Articol:   FUEL CELLS AND NANOPARTICLES.

Autori:  CRINA SUCIU, ALEX C. HOFFMANN, ARILD VIK, FIRUTA GOGA. 		 
       
         
  Rezumat:  Many new chemical methods are being developed and existing ones modified in order to improve the particles produced and the cost-effectiveness of the process. In our project, yttria stabilized zirconia (YSZ) nanoparticles with a mean particle diameter between 7 and 10 nm have been obtained using a calcination temperature of only 500oC through a modified sol-gel method using two new organic precursors: sucrose and pectin. These precursors are a good solution to the disadvantages presented for the sol-gel method, being cost-effective, ubiquitous and environmentally friendly. The calcination process was studied by thermal analysis (TA) and the crystal structure is analyzed by XRD The particle size was determined by Transmission Electron Microscopy (TEM), supported by the X-ray Diffraction (XRD) determination of the crystallite size using the Scherrer formula, and the Brunauer, Emmet, and Teller (BET) adsorption analysis used to determine the specific surface area.  
         
     
         
         
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