Ma Chenghai, Zhu Haoyue, Zhou Jun, Cui Zhiwei, Liu Teng, Wang Yicong, Wang Ying, Zou Zhigang
Eco-materials and Renewable Energy Research Center (ERERC), School of Chemistry and Chemical Engineering, National Laboratory of Solid State Microstructures, Kunshan Innovation Institute of Nanjing University, Jiangsu Key Laboratory for Nanotechnology, Nanjing, 210093, People's Republic of China.
Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
Dalton Trans. 2017 Mar 21;46(12):3877-3886. doi: 10.1039/c6dt04916h.
A monolayer MoS quantum dot confined polyimide (MQDs/PI) photocatalyst was synthesized by using a facile immersion-hydrothermal method. The investigations on the optical and electronic properties of MQDs/PI composites reveal that the strong quantum confinement effect of MQDs results in a blue-shift of the absorption band edge of PI, and the interfacial electronic interaction between MQDs and PI improves the charge transfer rate of MQDs/PI. The ultra-small size of 3.0 nm and perfect crystals of MQDs endow MQDs/PI composites with plenty of active sites and fast charge transfer, thus resulting in a 360% enhancement in photocatalytic hydrogen production compared with that of Pt/PI at the same loading amount of Pt. This discovery provides a new clue for the development of an efficient and sustainable non-noble metal photocatalyst.
采用简便的浸渍-水热法合成了一种单层MoS量子点限域聚酰亚胺（MQDs/PI）光催化剂。对MQDs/PI复合材料的光学和电子性质研究表明，MQDs的强量子限域效应导致PI吸收带边缘蓝移，且MQDs与PI之间的界面电子相互作用提高了MQDs/PI的电荷转移速率。3.0 nm的超小尺寸和MQDs的完美晶体赋予MQDs/PI复合材料大量活性位点和快速电荷转移，因此在相同Pt负载量下，与Pt/PI相比，光催化产氢提高了360%。这一发现为开发高效可持续的非贵金属光催化剂提供了新线索。
