期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 163, 期 -, 页码 123-128出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2014.07.054
关键词
Multiple exciton generation; PbS quantum dot; Graphene oxide; H-2 generation; Photocatalysis
资金
- 973 Program [2013CB933800]
- National Natural Science Foundation of China [21227005, 21390411, 91313302, 21035003, 21301110]
- Program for Changjiang Scholars and Innovative Research Team in University
Multiple exciton generation (MEG), also known as carrier multiplication (CM), is a process in which absorption of a single photon produces more than one electron-hole pairs. We introduce PbS QDs with multiple exciton generation (MEG) property into the construction of a novel ZnO@PbS/GO structure photocatalyst and applied to suspended photocatalytic H-2 evolution from water for the first time. The presence of multiple exciton generation process in PbS QDs, which is confirmed by transient absorption spectrum and photocurrent measurements, remarkably improves the photocatalytic efficiency of hydrogen generation combined with the electron-hole separation of GO. This strategy is proposed to open a new way for the photocatalysts design to achieve high efficiency based on QDs materials with MEG property. (C) 2014 Elsevier B.V. All rights reserved.
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