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以硫酸亚铁铵、葡萄糖和凹凸棒石为原料,采用一步水热法制备了凹凸棒石/Fe3O4/炭纳米复合材料,研究了氨水加入量和水热时间对材料微观结构、磁性能和吸附性能的影响,并与凹凸棒石、凹凸棒石/炭和凹凸棒石/Fe3O4进行对比分析。结果表明:由于氨水的加入,硫酸亚铁铵沉淀为纳米Fe3O4颗粒,负载于凹凸棒石表面;葡萄糖炭化为无定形炭负载于凹凸棒石表面。随着氨水加入量的增多和反应时间的延长,复合材料中Fe3O4含量相应增加,磁化率迅速增加。不同材料(凹凸棒石、凹凸棒石/炭、凹凸棒石/Fe3O4和凹凸棒石/Fe3O4/炭)的磁性能和吸附性能的对比分析表明:碳的负载有效改善了材料对有机污染物苯酚的吸附性能,Fe3O4则赋予材料磁性能。凹凸棒石/Fe3O4/炭对苯酚的去除率(57%)远高于未改性凹凸棒石,并可以从液相中磁分离。
Ammonium ferrous sulfate, glucose and attapulgite were used as raw materials to prepare attapulgite / Fe3O4 / carbon nanocomposites by one-step hydrothermal method. The effects of ammonia addition and hydrothermal time on the microstructure, magnetic properties and adsorption Performance, and with palygorskite, attapulgite / carbon and attapulgite / Fe3O4 comparative analysis. The results showed that ferrous ammonium sulfate precipitated as nano-Fe3O4 particles on the surface of attapulgite due to the addition of ammonia water, and carbonized amorphous carbon was loaded on the surface of attapulgite. With the increase of the amount of ammonia and reaction time, the content of Fe3O4 in the composites increases correspondingly and the magnetic susceptibility increases rapidly. Comparative analysis of magnetic properties and adsorption properties of different materials (attapulgite, attapulgite / carbon, attapulgite / Fe3O4 and attapulgite / Fe3O4 / charcoal) showed that the loading of carbon effectively improved the effect of the material on the degradation of organic pollutants Of the adsorption performance, Fe3O4 gives the material magnetic properties. Attapulgite / Fe3O4 / carbon removal of phenol (57%) is much higher than that of unmodified attapulgite and can be magnetically separated from the liquid phase.