Article Title

Efficient defect-controlled photocatalytic hydrogen generation based on near-infrared Cu-In-Zn-S quantum dots

Authors

Xiao-Yuan Liu, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China Key Laboratory for Advanced Materials & School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
Guozhen Zhang, School of Chemistry and Materials Science, Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), University of Science and Technology of China (USTC), Hefei 230026, China
Hao Chen, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
Haowen Li, Key Laboratory for Advanced Materials & School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
Jun Jiang, School of Chemistry and Materials Science, Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), University of Science and Technology of China (USTC), Hefei 230026, China
Yi-Tao Long, Key Laboratory for Advanced Materials & School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
Zhijun Ning, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

Keywords

quantum dots, photocatalysis, hydrogen generation, surface defect

Abstract

ABSTRACT The development of photocatalysts that can effectively harvest visible light is essential for advances in high-efficiency solar-driven hydrogen generation. Herein, we synthesized water soluble CuInS2 (CIS) and Cu-In-Zn-S (CIZS) quantum dots (QDs) by using one-pot aqueous method. The CIZS QDs are well passivated by glutathione ligands and are highly stable in aqueous conditions. We subsequently applied these QDs as a light harvesting material for photocatalytic hydrogen generation. Unlike most small band gap materials that show extremely low efficiency, these new QDs display remarkable energy conversion efficiency in the visible and near-infrared regions. The external quantum efficiency at 650 nm is ~1.5%, which, to the best of our knowledge, is the highest value achieved until now in the near-infrared region.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-017-1752-7

Publisher

Tsinghua University Press

Recommended Citation

Xiao-Yuan Liu,Guozhen Zhang,Hao Chen,Haowen Li,Jun Jiang,Yi-Tao Long,Zhijun Ning, Efficient defect-controlled photocatalytic hydrogen generation based on near-infrared Cu-In-Zn-S quantum dots. NanoRes.2018, 11(3): 1379–1388