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    STUDIA PHYSICA - Issue no. 2 / 2011  
         
  Article:   ANNEALING INDUCED TEXTURAL PARTICULARITIES ON TIO2-Au NANOCOMPOSITES.

Authors:  G. MELINTE, M. BAIA, V. DANCIU, L. BAIA. 		 
       
         
  Abstract:  Using the sol-gel synthesis method and the supercritical drying procedure we successfully prepared a highly porous TiO2 aerogel – Au nanoparticles composite with open ended cylindrical pores and high specific surface area. N2 sorption measurements were performed in order to understand the effect of thermal treatment on the morphological characteristics of the composite. The porosity and specific surface area significantly decreased (~80%) and the pores network became less connected because of the blocking effect. The thermal treatment also induced the narrowing of the pore size distribution and the entire withdraw of the sample microporosity. However, the heat treated composite remains relatively porous, with a narrow mesopores distribution and a good specific surface area that make them appropriate for further applications.

Keywords: aerogel, porosity, N2 adsorption, pore distribution, hysteresis 

  
         
     
         
         
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