0D–2D Quantum Dot: Metal Dichalcogenide Nanocomposite Photocatalyst Achieves Efficient Hydrogen Generation. Issue 22 (11th April 2017)

• Record Type: Journal Article
• Authors: Liu, Xiao‐Yuan; Chen, Hao; Wang, Ruili; Shang, Yuequn; Zhang, Qiong; Li, Wei; Zhang, Guozhen; Su, Juan; Dinh, Cao Thang; de Arquer, F. Pelayo García; Li, Jie; Jiang, Jun; Mi, Qixi; Si, Rui; Li, Xiaopeng; Sun, Yuhan; Long, Yi‐Tao; Tian, He; Sargent, Edward H.; Ning, Zhijun
• Is Part Of: Advanced materials. Volume 29:Issue 22(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-04-11
• Subjects: 0D–2D nanocomposites -- hydrogen generation -- MoS2 nanosheets -- photocatalysis -- quantum dots; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201605646
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : 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 MoS2 nanosheet is developed. This can leverage the strong light harvesting capability of CQDs and catalytic performance of MoS2 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. Abstract : A nanocomposite based on the combination of 0D Zn‐Ag‐In‐S quantum dots (QDs) as an efficient visible‐light harvester, and 2D MoS2 nanosheet as a catalyst is fabricated for solar‐driven hydrogen generation. By reducing the defects of QDs and accelerating carrier separation between the QDs and the nanosheet, an excellent quantum efficiency of 41% at 400 nm is achieved.