effect of concentration and thermal treatment on the properties of sol-gel derived cuo/sio2 nanostructure
نویسندگان
چکیده
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 necessary amount of trihydrated copper nitrate is added to the solution in such a manner that the concentration of the copper oxide in final solution reach to 1, 2 and 5 wt% (samples a, b and c respectively). after ambient drying, the gel samples are heated from 60 to 1000˚c at a slow heating rate (50°c/h). the absorption and transmittance spectrum of various concentrations of copper are studied by uv-vis spectrophotometer. thermal treatment effects are characterized by ftir, tga, tem, sem, xrd, bet and tpr methods at different temperatures.
منابع مشابه
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...
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عنوان ژورنال:
iranian journal of chemistry and chemical engineering (ijcce)ناشر: iranian institute of research and development in chemical industries (irdci)-acecr
ISSN 1021-9986
دوره 29
شماره 2 2010
کلمات کلیدی
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