以壳聚糖为原料,通过琥珀酸酐与活性白土、氧化石墨烯进行化学改性处理,制备琥珀酰化壳聚糖/石墨烯复合材料。利用红外光谱仪、热失重分析、扫描电镜等对该复合材料的结构、性能及形貌进行表征,并通过紫外-可见分光光度计对其吸附酸性品红的性能进行探讨。结果表明:复合材料具有比表面积较大和活性位点较多的疏松多孔的结构;在投加量为0.1g,吸附时间为45min,pH=6,初始浓度为20mg/L时,对酸性品红的吸附效果最佳,最大去除率达99.1%。壳聚糖和石墨烯的引入改变了活性白土在水中的分散状态,对酸性品红的吸附能力得到提高,吸附行为符合Langmuir等温吸附模型。实验表明,该复合材料具有较好的重复利用性。

Using chitosan as raw material,succinic anhydride,activated clay and graphene oxide were chemically modified to prepare succinylated chitosan hybrid materials.It was characterized by fourier transform infrared spectrum,thermal gravimetric analysis and scanning electron microscope.The adsorbent performanceare of composite for acid fuchsin was discussed by UV-visible spectrophotometer.The results showed that the structure of hybrid material had a large specific surface area and loose pores with many active sites.The best adsorption conditions were the amount of soil cast composite adsorbent 0.1g,the adsorption time 45min,pH=6,the initial concentration of 20mg·L^-1.The maximum removalrate for acid fuchsin was 99.1%.The results showed that the introduction of chitosan and graphene changed the dispersion state of activated clay in water,greatly improved the adsorption capacity for acid fuchsin.The adsorption process conformed to the Langmuir model.Hybrid materials had better reusability.