کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5367812 | 1388374 | 2011 | 5 صفحه PDF | دانلود رایگان |
Synthesis of magnetically separable photocatalytic active composite γ-Fe2O3@TiO2 is the main objective of this work. In the first step, maghemite nanoparticles were prepared by a precipitation method and consequently covered by the citric acid in order to adjust the zeta-potential of the particle surface. The magnetic carrier was enfolded by TiO2 via heterogeneous precipitation of TiOSO4 using urea as a precipitation agent. The procedure was designed to minimize the production costs in order to be easily transferred into the industry scale conserving the high quality of the photoactive product. Nontoxic element oxides were used because of the ecological acceptance. Various methods were employed to characterize and study the intermediate (magnetic nanoparticles) and final materials (TiO2-maghemite composite), respectively. Moreover, the influence of the subsequent annealing on the structure, phase composition and properties of the products is discussed.
Synthesis of magnetically separable photocatalytic active composite γ-Fe2O3@TiO2 is the main objective of this work. In the first step, maghemite nanoparticles were prepared by a precipitation method and consequently covered by the citric acid in order to adjust the zeta-potential of the particle surface (A). The magnetic carrier was enfolded by TiO2 via heterogeneous precipitation of TiOSO4 using urea as a precipitation agent. The procedure was designed to minimize the production costs in order to be easily transferred into the industry scale conserving the high quality of the photoactive product (B). Nontoxic element oxides were used because of the ecological acceptance. Various methods were employed to characterize and study the intermediate (magnetic nanoparticles) and final materials (TiO2-maghemite composite), respectively. Moreover, the influence of the subsequent annealing on the structure, phase composition and properties of the products is discussed.Research highlightsⶠWe used surface modification of oxide nanoparticles in industrial scale method. ⶠWe adjust industrial precipitation method for fine crystal morphology production. ⶠEcologically acceptable photocatalytic nanocomposite was prepared. ⶠThis composite was characterized by commonly used solid state methods.
Journal: Applied Surface Science - Volume 257, Issue 11, 15 March 2011, Pages 4844-4848