纳米四氧化三铁的制备及其催化过氧化氢降解罗丹明B废水的研究

Preparation of Fe_3O_4 nanoparticles and its catalyzing H_2O_2 for the degradation of rhodamine B wastewater

采用沉淀法制备了纳米四氧化三铁,其粒径范围在50～100 nm,以其为催化剂催化过氧化氢对染料罗丹明B进行降解。考察了催化剂用量、双氧水用量、pH、反应温度对罗丹明B降解率的影响。在实验条件下,对罗丹明B的降解率达96%,其反应符合一级动力学反应,且催化剂可以重复使用。

Fe3O4 nanoparticles with the size from 50 to 100 nm were prepared by precipitation method,which was used to catalyze H2O2 for the degradation of Rhodamine B wastewater.The effects of the Fe3O4 and H2O2 dosage,pH,reaction temperature on the degradation rate of Rhodamine B were investigated.The degradation rate of Rhodamine B reached 96%,which accorded with the first-order kinetics,and the catalyst could be reused.