| 초록 |
Sunlight-driven photocatalysis has become a promising technology for green energy and environment treatment. Efficient solar conversion in catalysis plays a key role for pursuing industrial and large scale applications. Recently, surface modification of TiO2 by non-metal nanomaterials has attracted tremendous attention for improving photocatalytic performance under sunlight. Herein, we demonstrate that heterojunction system of commercial TiO2 nanopartiles coupled withfunctionalized graphene quantum dots was prepared by on-step and low temperature method. GQDs can be served as cocatalytic site which enhances not only light absorption but also photo-induced charge separation. The GQD@TiO2 shows high hydrogen evolution rate of 1.5 mmol/g h. On the other hand, the catalyst shows superior photo degradation toward different waste water. This greatly enhanced performance can be attributed to the strong visible absorption of GQDs as well as effective charge separation and transfer via Z-scheme mechanism. This work offers a potential find for designing and developing noble-metal-free hybrid materials for boosting photocatalytic activity. |
