Preparation and visible-light photocatalytic property of nanostructured Fe-doped TiO_2 from titanium containing electric furnace molten slag

摘要

Nanostructured Fe-doped titanium dioxide was synthesized from titanium containing electric furnace molten slag(TCEFMS)by using an alkali fusion,followed by a hydrolyzation-acidolysis-calcination route.The efects of alkali/slag mass ratio,calcinating temperature,calcinating time,and water/slag mass ratio on the extraction efciency and purity of products were systematically studied in this paper.It is indicated that the best extraction efciency of nanostructured Fedoped titanium dioxide is 99.35%,when the molten slag is calcinated at 700 C for 1 h with the mass ratio of alkali/molten slag of 1.5:1.The influence of alkali/slag mass ratio on the photocatalytic activity of final products was evaluated by the photodegradation of methyl blue under visible light irradiation.A maximum photodegradation efciency of 88.12%over30 min was achieved under the optimum conditions.