نوع مقاله : مقاله پژوهشی
1 دانشجوی دکتر شیمی معدنی، دانشکده شیمی، دانشگاه علم و صنعت ایران
2 گروه معدنی، دانشکده شیمی، دانشگاه علم و صنعت ایران، تهران، ایران
3 استاد تمام، دانشکده شیمی، دانشگاه علم و صنعت ایران
عنوان مقاله [English]
Through the study, a method is presented for producing nano-sized metal oxides from Gonabad clay minerals as raw material. In this method the calcined fine powdered clay which was created by the crushing and grinding, further leached by sulfuric acid in different periods of time. Chemical compositions of the resulting clay were determined by X-ray fluorescence (XRF) technique before and after treatment with acid. Metal (hydr) oxides, especially iron oxides, obtained from acid-leachate were precipitated in present of different volumes of sodium hydroxide solution. Finally, powders of nano-sized metal particles, obtained after calcination were used to characterize by field emission scanning electron microscopy (FE-SEM) equipped with energy-dispersive X-ray (EDX) analysis. It is concluded that chemical composition of precipitates is prone to change during basification. The survey was made in addition to the other experiments which were performed to synthesize mesoporous silica and nano silica from the kaolin deposit. The so-obtained metal oxide nanoparticles are likely prone to eliminating water contaminants.