School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China.
Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China.
Adv Mater. 2017 Jun;29(22). doi: 10.1002/adma.201605646. Epub 2017 Apr 11.
Hydrogen generation via photocatalysis-driven water splitting provides a convenient approach to turn solar energy into chemical fuel. The development of photocatalysis system that can effectively harvest visible light for hydrogen generation is an essential task in order to utilize this technology. Herein, a kind of cadmium free Zn-Ag-In-S (ZAIS) colloidal quantum dots (CQDs) that shows remarkably photocatalytic efficiency in the visible region is developed. More importantly, a nanocomposite based on the combination of 0D ZAIS CQDs and 2D MoS nanosheet is developed. This can leverage the strong light harvesting capability of CQDs and catalytic performance of MoS simultaneously. As a result, an excellent external quantum efficiency of 40.8% at 400 nm is achieved for CQD-based hydrogen generation catalyst. This work presents a new platform for the development of high-efficiency photocatalyst based on 0D-2D nanocomposite.
通过光催化驱动的水分解产生氢气为将太阳能转化为化学燃料提供了一种便捷的方法。为了利用这项技术，开发能够有效利用可见光进行氢气生成的光催化系统是一项重要任务。在此，开发了一种无镉的 Zn-Ag-In-S（ZAIS）胶体量子点（CQDs），其在可见光区域具有显著的光催化效率。更重要的是，开发了一种基于 0D ZAIS CQDs 和 2D MoS 纳米片结合的纳米复合材料。这可以同时利用 CQDs 的强光捕获能力和 MoS 的催化性能。结果，基于 CQD 的制氢催化剂在 400nm 处实现了 40.8%的优异外量子效率。这项工作为基于 0D-2D 纳米复合材料的高效光催化剂的开发提供了一个新的平台。
