Hata Yuuki, Saito Yoshitaka, Sawada Toshiki, Matsumoto Hidetoshi, Serizawa Takeshi
Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8550 Japan
Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8550 Japan.
RSC Adv. 2019 Nov 27;9(66):38848-38854. doi: 10.1039/c9ra08318a. eCollection 2019 Nov 25.
The assembly of nanomaterials into a networked superstructure is a strategy used to construct macroscopic porous materials having the functional properties of nanomaterials. However, because nanomaterials generally prefer densely packed assembled states owing to their high surface energies, the construction of a fine porous structure is still a challenge. In this study, we demonstrate the assembly of reduced graphene oxides (rGOs) into a fine porous structure confinement within robust cellulose oligomer networks. The confinement of rGOs within cellulose oligomer networks was achieved in one step the enzymatic synthesis of cellulose oligomers. When the resultant cellulose oligomer gels confining rGOs were reduced by hydrogen iodide, the robust cellulose oligomer networks served as a confinement space for rGOs, preventing excessive aggregation of the rGOs and thus encouraging their assembly into a fine porous structure. Electrochemical measurements revealed that the porous rGO materials could act as electrode materials for supercapacitors. Our strategy based on simple physical confinement will allow for the creation of functional porous materials with excellent nanomorphologies from various nanomaterials.
将纳米材料组装成网络状超结构是一种用于构建具有纳米材料功能特性的宏观多孔材料的策略。然而，由于纳米材料通常因其高表面能而倾向于紧密堆积的组装状态，因此构建精细的多孔结构仍然是一个挑战。在本研究中，我们展示了将还原氧化石墨烯（rGO）组装成精细的多孔结构，并将其限制在坚固的纤维素低聚物网络中。通过纤维素低聚物的酶促合成一步实现了rGO在纤维素低聚物网络中的限制。当用碘化氢还原所得的含有rGO的纤维素低聚物凝胶时，坚固的纤维素低聚物网络充当rGO的限制空间，防止rGO过度聚集，从而促使它们组装成精细的多孔结构。电化学测量表明，多孔rGO材料可作为超级电容器的电极材料。我们基于简单物理限制的策略将允许从各种纳米材料中创建具有优异纳米形态的功能性多孔材料。
