Facile and scalable production of three-dimensional spherical carbonized bacterial cellulose/graphene nanocomposites with a honeycomb-like surface pattern as potential superior absorbents
Facile and scalable production of three-dimensional spherical carbonized bacterial cellulose/graphene nanocomposites with a honeycomb-like surface pattern as potential superior absorbents
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DOI：
10.1039/c5ta07464a
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发表时间：
2015-12
影响因子：
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通讯作者：
Y. Wan;Fang Zhang;Chunzhi Li;Guang-yao Xiong;Yong Zhu;Honglin Luo
中科院分区：
文献类型：
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作者：
Y. Wan;Fang Zhang;Chunzhi Li;Guang-yao Xiong;Yong Zhu;Honglin Luo
水被油和有机溶剂频繁污染，需要高效且低成本的吸收剂。在这里，第一次，一种新型的纳米复合材料的球形细菌纤维素（SCBC）和石墨烯（GE）与蜂窝状的表面形态和三维（3D）互连的多孔结构是通过一个简单的和可扩展的一锅原位生物合成路线在搅拌培养条件下，然后碳化。采用SEM、TEM、XRD、FTIR、拉曼、润湿性和吸附容量等测试手段对所制备的SCBC/GE纳米复合材料进行了表征。SEM图像显示，SCBC/GE纳米复合材料呈现出由脊和大空腔组成的蜂窝状表面图案，平均直径约为97 μm。此外，SCBC/GE纳米复合材料具有高孔隙率、大比表面积、强疏水性和良好的弹性。重要的是，它对各种油类和有机溶剂的吸收能力都很上级（最大值达到其自身重量的457倍），高于迄今为止报道的任何其他CNF基气凝胶，因此具有在环境保护领域使用的潜力。此外，对油和有机溶剂的潜在吸收机制进行了探索。
Frequent contamination of water by oils and organic solvents necessitates efficient and low cost absorbents. Here, for the first time, a novel nanocomposite of sphere-like carbonized bacterial cellulose (SCBC) and graphene (GE) with a honeycomb-like surface morphology and a three-dimensional (3D) interconnected porous structure was synthesized via a facile and scalable one-pot in situ biosynthesis route under agitated culture conditions followed by carbonization. The as-prepared SCBC/GE nanocomposite was characterized by SEM, TEM, XRD, FTIR, Raman, wettability, and absorption capacity measurements. SEM images reveal that the SCBC/GE nanocomposite exhibits a honeycomb-like surface pattern consisting of ridges and large cavities with an average diameter of around 97 μm. Furthermore, the SCBC/GE nanocomposite has high porosity, large specific surface area, strong hydrophobicity, and good elasticity. Importantly, it shows superior absorption capacities for a wide range of oils and organic solvents (the maximum value reaches 457 times of its own weight), higher than any other CNF-based aerogels reported so far, thus having the potential to be used in the field of environmental protection. Additionally, the underlying absorption mechanisms for oil and organic solvents have been explored.