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TiO2–Fe2O3 composites of core-shell structure were synthesized by using surfactant-assisted preparation method. The shell on TiO2 surface was composed of small Fe2O3 nanoparticles with an average diameter of 12nm. The thickness of Fe2O3 shell was controlled by varying the concentration of Fe salt and using CTAB as the surfactant and binder. After annealing at 450°C, the crystal structures of composites...
Silica–hematite (α-Fe 2 O 3 ) nanocomposites were synthesized by addition of aqueous solution containing ferrous ions (Fe 2+ ), cetyltrimethylammonium bromide (CTAB) as a surfactant and tert-butanol (t-butanol) as a cosurfactant into colloidal silica solution. At alkaline atmosphere, silica surface with negative charges electrostatically attracts positively-charged iron hydroxide...
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