摘要
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。
Palygorskite/Fe3O4/carbon composite was prepared by one-step hydrothermally treatment from palygorskite, ammonium iron sulfate hexahydrate and glucose. The microstructures, magnetic and adsorption properties of the composite obtained were investigated. The results showed that Fe3O4 particles were loaded on the surface of palygorskite and glucose was carbonized as carbon with --CH organic groups, whose content was 20.59%. The loading of carbon remarkably improved the removal rate of phenol onto palygorskite/Fe3O4/carbon, which value （57%） was far higher than that of unmodified palygorskite （18%）. The enhancement in removal of phenol onto composite was attributed to the loading carbon with organic groups. Furthermore, the solids in adsorption-desorption equivilium can be effectively separated from liquids though a simple magnetic procedure because of the loading of Fe3O4.
出处
《炭素技术》
CAS
北大核心
2014年第1期23-27,38,共6页
Carbon Techniques
基金
国家自然科学基金(51002042)
安徽省教育厅自然科学研究(2011AJZR0080)
关键词
复合材料
水热
吸附剂
Composite
hydrothermal treatment
adsorbent
