Assembly of Layered Silicate Loaded Quaternized Chitosan/Reduced Graphene Oxide Composites as Efficient Absorbents for Double-Stranded DNA
Assembly of Layered Silicate Loaded Quaternized Chitosan/Reduced Graphene Oxide Composites as Efficient Absorbents for Double-Stranded DNA
复制标题
层状硅酸盐负载季铵化壳聚糖/还原氧化石墨烯复合材料的组装作为双链 DNA 的高效吸收剂
DOI：
10.1021/acssuschemeng.5b00404
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发表时间：
2015-08-01
影响因子：
8.4
通讯作者：
Sun, Runcang
中科院分区：
文献类型：
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作者：
Li, Xiaoyun;Han, Yang;Sun, Runcang
以可再生资源季铵化壳聚糖（QCS）和层状硅酸盐为绿色还原稳定剂，制备稳定的还原氧化石墨烯（rGO）溶液。累托石（REC）和有机累托石（OREC）是本工作中使用的典型层状硅酸盐。紫外-可见吸收光谱、傅里叶变换红外光谱、X射线光电子能谱和拉曼光谱的分析结果表明，QCS对rGO具有良好的还原效果。透射电子显微镜、原子力显微镜和X射线衍射结果表明，rGO纳米片通过阳离子交换负载了层状硅酸盐，得到了rGO/QCS/层状硅酸盐复合材料。rGO/QCS/OREC的zeta电位（+38.5 mV）高于rGO/QCS/REC（+37.3 mV），表明OREC的稳定效果优于rGO/QCS/REC。本文还对rGO/QCS/层状硅酸盐复合材料的组装机理进行了初步探讨。
In this study, we prepared stable reduced graphene oxide (rGO) solutions with renewable resource quaternized chitosan (QCS) and layered silicate as green reducing and stabilizing agents. Rectorite (REC) and organic rectorite (OREC) are typical layered silicate employed in this work. UV–visible absorption spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy results showed the good reducing effect of QCS to produce rGO. Transmission electron microscopy, atomic force microscope, and X-ray diffraction results showed that rGO nanosheets were loaded with layered silicate through cation exchange to get a rGO/QCS/layered silicate composite. The high zeta potential (+41.4 mV) of the rGO/QCS composite showed the good stabilizing effect of QCS, and the higher zeta potential of rGO/QCS/OREC (+38.5 mV) than that of rGO/QCS/REC (+37.3 mV) indicated that OREC had a better stabilizing effect than REC. The possible assembly mechanism of the rGO/QCS/layered silicat...