Tuning shape of three dimensional graphene sheets
Tuning shape of three dimensional graphene sheets
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DOI：
10.1016/j.cattod.2016.02.009
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发表时间：
2016-10
期刊：
影响因子：
5.3
通讯作者：
Haiyan Wang;Wei Wei-Wei;Y. Hu
中科院分区：
文献类型：
--
作者：
Haiyan Wang;Wei Wei-Wei;Y. Hu
3D石墨烯已被探索作为许多应用的重要材料和催化剂。然而，调整3D石墨烯片的形状仍然是一个挑战。在此，它表明，从Li2O和CO之间的反应合成的3D石墨烯片的形状强烈地依赖于Li2O的粒径。当Li2O粒径非常小时（约400 nm），形成的石墨烯片具有颗粒状形状。随着Li2O粒径的增大，石墨烯片的形貌由花状结构向蜂窝状结构转变。此外，石墨烯从颗粒状到蜂窝状结构的形状变化可以增加其作为染料敏化太阳能电池（DSSC）的对电极催化剂的电催化效率。
3D graphene has been explored as an important material and catalyst for many applications. However, it is still a challenge to tune the shape of 3D graphene sheets. Herein, it is demonstrated that the shapes of 3D graphene sheets, which were synthesized from the reaction between Li2O and CO, are strongly dependent on the particle size of Li2O. When Li2O particle size was very small (about 400 nm), the formed graphene sheets possessed a granulated shape. However, as Li2O particle size increased, the shape of the synthesized graphene sheets changed to flower-structure and then to honeycomb-structure. Furthermore, the shape change of graphene from the granulated to the honeycomb-structured can increase its electro-catalytic efficiency as a counter electrode catalyst for dye-sensitized solar cells (DSSCs).