Journal
APPLIED SURFACE SCIENCE
Volume 469, Issue -, Pages 657-665Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.10.241
Keywords
Photocatalyst; Graphene; g-C3N4; NiS; H-2 evolution
Categories
Funding
- NSFC [21801091]
- National Postdoctoral Program for Innovative Talents [BX20180231]
- Opening Fund of Hubei Key Laboratory of Processing and Application of Catalytic Materials [201828903]
- Science Technology Development Planning of Jilin Province [20170520069JH]
- Education Department Project of Jilin Province [JJKH20180556KJ]
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Up to now, rational design and facile synthesis of photocatalysts with high activity and low cost remain a great challenge. Here, noble-metal-free graphene and NiS co-modified g-C3N4 composite photocatalyst was prepared using an one-step hydrothermal method. The ternary composite displayed enhanced photocatalytic water splitting activity. When the weight ratios of RGO and NiS were 0.25% and 3%, respectively, the highest H-2 evolution rate was achieved, which was 21.8-fold that of bulk g-C3N4. The introduction of NiS and RGO dual cocatalysts promoted the separation of photogenerated electron-hole pairs and improved the light absorption of g-C3N4, thus enhancing the photocatalytic activity. This work provides significant guidance for the modification of photocatalytic materials with noble-metal-free cocatalysts to realize high-efficient photocatalytic water splitting for hydrogen generation.
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