About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Synthesis of TiO2/Graphene Oxide Core-shell Nanoparticles via Catalyst-free Microwave-assisted Reaction for Highly Efficient Photocatalysis |
| Author(s) |
Kunihiko Kato, Yunzi Xin, Takashi Shirai |
| On-Site Speaker (Planned) |
Kunihiko Kato |
| Abstract Scope |
An efficient buildup of hetero-nanostructure is still challenging in various applications such as energy harvesting-storage devices, sensors, and heterogeneous catalysts. We demonstrate a facile formation of TiO2/graphene oxide core-shell nanoparticles with sub-5 nm heterojunction via a catalyst-free microwave-assisted reaction. The TiO2 nanoparticles with the defective surface with oxygen vacancies were fully encapsulated by mono- or few-layer graphene oxide derived from commodity plastics (e.g., PP, PE, and PET). A comprehensive characterization reveals that the structural-engineered surface (core-shell structure) benefits a broad light absorption in the range of 200-800 nm and a spatial separation of photo-excited carriers in addition to a molecular capturability, resulting in an enhancement of photocatalytic decomposition rate for azo-dye water pollutant. |