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芬顿催化是污水处理中最常用的技术之一,但是传统芬顿试剂需要对水体进行酸化并造成大量亚铁离子浪费.本文用水合肼还原法制备了四氧化三铁-石墨烯复合芬顿催化剂(Fe3O4-G),测试其催化脱色甲烯蓝的活性.Fe3O4-G样品用透射电镜、X射线光电子能谱和红外光谱等表征.Fe3O4-G能催化双氧水分解氧化脱色甲烯蓝.Fe3O4-G在pH3.5~9.5范围内均能有效催化脱色甲烯蓝,最佳pH为8.5.Fe3O4-G的催化活性几乎不受溶剂的影响,加入自由基淬灭剂叔丁醇对脱色也没有明显抑制.Fe3O4-G在较高的温度下催化能力更强,增大双氧水用量也能促进脱色反应.
Fenton catalytic is one of the most commonly used technologies in wastewater treatment, but the traditional Fenton reagent needs to acidify the water and cause a lot of ferrous ions to be wasted.In this paper, ferroferric oxide reduction method was used to prepare ferroferric oxide-graphene composite Fenton (Fe3O4-G) was prepared and its catalytic activity for decolorization of methylene blue was tested.Fe3O4-G samples were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and infrared spectroscopy. Fe3O4-G can catalyze the hydrogen peroxide decomposition of methylene blue -G can effectively catalyze the decolorization of methylene blue in the pH range of 3.5 ~ 9.5, and the optimum pH is 8.5. The catalytic activity of Fe3O4-G is almost unaffected by the solvent. The addition of the free radical quencher t-butyl alcohol also decolorizes No obvious inhibition.Fe3O4-G at higher temperatures catalytic ability to increase the amount of hydrogen peroxide can also promote decolorization reaction.