| 초록 |
We demonstrate that three-dimensional polyurea network nanogels are versatile coating materials that coat an ultrathin organic network layer on the surface of nanoparticles by simple solution methods. Firstly, graphene oxides were coated with the polyurea network nanogel to yield a polyurea-graphene-polyurea sandwich-structured composite. The subsequent thermal treatment produced a composite with the same triple-layered architecture, which showed excellent performance as an electrocatalyst for the oxygen reduction reaction. Secondly, the nanogel coating containing photoactive moieties could be evenly coated onto titania particles to yield a highly active photocatalyst for the generation of hydrogen peroxide. The ability to cover the nanoscale features with nanometer-thick, instantly-setting, and irreversible coatings allows the preparation of new functional nanocomposites with stable performances. We discuss the potentials of the nanogel coatings further for different applications. |
