Heterostructuring noble-metal-free 1T' phase MoS2 with g-C3N4 hollow nanocages to improve the photocatalytic H2 evolution activity

卷:8

Article

关键词: GRAPHITIC CARBON NITRIDE;    HYDROGEN EVOLUTION;    1T-MOS2 NANOSHEETS;    DOPED G-C3N4;    NANOCOMPOSITES;    FABRICATION;    DOTS;    CONSTRUCTION;    COCATALYST;    NANOFIBERS;   

DOI  :  10.1016/j.gee.2021.11.002

来源: SCIE

【 摘 要 】

In this work, we report the preparation of 1T'-MoS2/g-C3N4 nanocage (NC) heterostructure by loading 2D semi-metal noble-metal-free 1T'- MoS2 on the g-C3N4 nanocages (NCs). DFT calculation and experimental data have shown that the 1T'-MoS2/g-C3N4 NC heterostructure has a stronger light absorption capacity and larger specific surface area than pure g-C3N4 NCs and g-C3N4 nanosheets (NSs), and the presence of the co-catalysts 1T'-MoS2 can effectively inhibit the photoinduced carrier recombination. As a result, the 1T'-MoS2/g-C3N4 NC heterostructure with an optimum 1T'-MoS2 loading of 9 wt% displays a hydrogen evolution rate of 1949 mu mol h-1 g-1, 162.4, 1.2, 1.5, 1.6 and 1.2 times than pure g-C3N4 NCs (12 mu mol h-1 g-1), Pt/g-C3N4 NCs (1615 mu mol h-1 g-1) and Pt/g-C3N4 nanosheets (NSs, 1297 mu mol h-1 g-1), 1T'-MoS2/g-C3N4 nanosheets (1216 mu mol h-1 g-1) and 2H-MoS2/g-C3N4 nanocages (1573 mu mol h-1 g-1), respectively, and exhibits excellent cycle stability. Therefore, 1T'-MoS2/g-C3N4 NC heterostructure is a suitable photocatalyst for green H2 production.(c) 2021 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communi-cations Co., Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).