论文部分内容阅读
以凹凸棒石黏土和废活性白土为原料,通过铁盐水解法、有机质热裂解炭化和对气氛的控制,在凹凸棒石表面负载γ-Fe2O3和炭(carbon,C),制备凹凸棒石/γ-Fe2O3/C纳米复合材料。通过磁化率、红外吸收光谱、透射电镜、X射线衍射等对样品进行了研究。结果表明:凹凸棒石/γ-Fe2O3/C纳米复合材料具有良好的磁性能,γ-Fe2O3颗粒较好地负载到了凹凸棒石晶体的表面,颗粒直径为10～60nm;炭以无定形的形态负载在凹凸棒石晶体表面和晶体之间,复合材料中的含炭率为7.4%(质量分数),且复合材料中出现了C-H和C=O官能团;复合材料对有机污染物的亲和性明显高于凹凸棒石的,实现了黏土矿物吸附剂亲有机物和强磁性改性。
Using attapulgite clay and waste activated clay as raw materials, γ-Fe2O3 and carbon (C) were loaded on the surface of attapulgite by ferric salt hydrolysis, pyrolysis and carbonization of organic matter and control of the atmosphere to prepare attapulgite / γ -Fe2O3 / C nanocomposites. The samples were investigated by magnetic susceptibility, infrared absorption spectroscopy, transmission electron microscopy and X-ray diffraction. The results show that the attapulgite / γ-Fe2O3 / C nanocomposites have good magnetic properties. The γ-Fe2O3 particles are well supported on the surface of the attapulgite crystal with the particle diameter of 10-60 nm. The amorphous carbon Loaded on the surface of the attapulgite crystal and the crystal, the carbon content in the composite material was 7.4% (mass fraction), and the CH and C = O functional groups appeared in the composite; the affinity of the composite material for the organic pollutant Obviously higher than the attapulgite, to achieve a clay mineral adsorbent organophilic and ferromagnetic modification.