Sayed Hossein Tohidi
Agricaltur & Medical & Industrial Research School, Nuclear Science and Technology Institute, P. O. Box: 31485- 498, Karaj a, I.R. IRAN
[ 1 ] - Characterization of Sol-Gel Derived CuO@SiO2 Nano Catalysts towards Gas Phase Reactions
One distinct concentration of copper ions was embedded into the silica matrix to xerogel form using copper source Cu(NO3)2∙3H2O. The xerogel samples were prepared with using hydrolysis and condensation reactions of TetraEthyl Ortho-Silicate (TEOS) by the sol-gel method. In this investigation, new molar ratio of H2</su...
[ 2 ] - Effect of Concentration and Thermal Treatment on the Properties of Sol-Gel Derived CuO/SiO2 Nanostructure
Various concentrations of copper are embedded into silica matrix to xerogel form using copper source - Cu(NO3)2∙3H2O. The xerogel samples are prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) by the sol-gel method and with determination of new molar ratio of components H2O/TEOS to be 6.2. In this investigation, the necess...
[ 3 ] - EFFECT OF INORGANIC HYBRID LiBr ON THE SILICA MATRIX XEROGELS (RESEARCH NOTE)
Abstract The SiO2-LiBr hybrid porous materials were prepared by the sol-gel method. This process was obtained by the hydrolysis and condensation Tetraethyl orthosilicate (TEOS) with replacement of ethanol from alcogel by the drying at ambient temperature to obtain xerogel structure. The alcogel samples were synthesized from TEOS, EtOH, H2O, HCl, NH4OH and LiBr. The total molar ratio of the comp...
[ 4 ] - Comparison Nanostructure Behaviour of Copper Species on the Silicamatrix Xerogels
The incorporation of copper species is synthesized in a silica matrix by the sol-gel method. We have doped copper ions and copper particles using two different copper sources: Cu(NO3)2.3H2O and copper particles chemically synthesized. We can prepare the particles of copper metallic, cuprous and cupric oxide and compare the synthesis and characterization copper species on the silica matrix. O...
[ 5 ] - Preparation and Characterization of SiO2-CaCl2 Nanocomposite by the Sol-Gel Method
The SiO2-CaCl2 hybrid porous materials were prepared by the sol-gel method. This process was conducted by the hydrolysis and condensation of Tetraethyl orthosilicate (TEOS) by replacement of ethanol from alcogel and drying at the ambient temperature to obtain xerogel structure. The alcogel samples were synthesized from TEOS, EtOH, H2O, HCl, NH4OH and CaCl2, while the total molar ratio of the co...
[ 6 ] - Preparation and Study of Molecular Structure of Copper Ions Doped in a Silica Xerogel Matrix
The silica xerogel is prepared using copper source; 0.02 mol of Cu(NO3)2.3H2O that has been added to 1 mol TEOS (tetraethyl orthosilicate). The Copper ions are doped to silica matrix by the sol gel method and determination of total molar ratio of components with a reported molar ratio of H2O /TEOS(R) = 6.2. In this method, the acidity the of reaction (pH) depends on the catalyst type in the hyd...
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