Abstract
Graphene oxide (GO)-chitosan composite hydrogels were successfully prepared via the self-assembly of chitosan molecules and GO. These as-prepared hydrogels were characterized by different techniques. The morphology of the internal network structure of the nanocomposite hydrogels was investigated. The adsorption capacity results demonstrate that the prepared GObased composite hydrogels can efficiently remove three tested dye molecules, Congo red, methylene blue and Rhodamine B, from wastewater in accordance with the pseudo-second-order model. The dye adsorption capacity of the obtained hydrogels is mainly attributed to the GO sheets, whereas the chitosan molecule was incorporated to facilitate the gelation process of the GO sheets. The present study indicates that the as-prepared composite hydrogels can serve as good adsorbents for wastewater treatment as well as the removal of harmful dyes.
中文摘要
本文通过壳聚糖分子与氧化石墨烯(GO)的自组装成功制备了GO-壳聚糖复合水凝胶, 并对该水凝胶进行了表征. 研究发现复合水凝胶中存在网状微观结构. 吸附性能结果表明制得的基于GO的复合水凝胶可以有效地从废水中去除三种测试染料分子, 同时符合准二阶模型. 该水凝胶的染料吸附能力主要来源于GO片层, 而壳聚糖分子促进了GO片层的凝胶化过程. 目前的研究结果表明制备的复合水凝胶可以作为良好的吸附剂应用于废水处理以及有害染料去除等领域.
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Tifeng Jiao is a professor of applied chemistry at the School of Environmental and Chemical Engineering, Yanshan University. He received his PhD degree in physical chemistry in 2006 at the Institute of Chemistry, CAS. His research focuses on the controlled synthesis, self-assembly, and applications of nanocomposites and nanomaterials.
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Zhao, H., Jiao, T., Zhang, L. et al. Preparation and adsorption capacity evaluation of graphene oxide-chitosan composite hydrogels. Sci. China Mater. 58, 811–818 (2015). https://doi.org/10.1007/s40843-015-0090-x
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DOI: https://doi.org/10.1007/s40843-015-0090-x