Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 119, Issue -, Pages 53-60Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.11.067
Keywords
Near infrared response; Photocatalysis; H 2 evolution; Pt-tipped Au nanorods
Funding
- National Natural Science Foundation of China [22162009, 22006052]
- Key Laboratory of Solid Waste Resource Utilization and Environmental Protection of Haikou City
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A ternary Pt-tipped Au nanorods (Pt-Au)/g-C 3 N 4 heterostructure was constructed, which effectively broadened the optical absorption ability of g-C 3 N 4 and exhibited excellent photocatalytic hydrogen production performance in the visible and near-infrared region.
The search for a suitable cocatalyst for graphitic carbon nitride (g-C 3 N 4 ) to realize efficient photocatalytic hydrogen (H 2 ) evolution has been regarded as one of the most valid tactics to alleviate energy crisis. Herein, a ternary Pt-tipped Au nanorods (Pt-Au)/g-C 3 N 4 heterostructure is constructed, which shows excellent H 2 production performance in visible and near-infrared (NIR) region, especially in NIR region with a rate of 51.6 mu mol g -1 h -1 . Therein, not only is the optical absorption ability of g-C 3 N 4 broadened, the light absorption range is also extended to NIR region through introduction of Pt-Au architectures. Besides, analysis of the hot electrons generated in energy relaxation of plasmon indicates hot electron transfers fromexcited Au nanorods to Pt nanoparticles, resulting in H 2 evolution. Compared with bare g-C 3 N 4 , the superior photocatalytic activity could be attributed to the surface plasmon resonance effect (SPR) of Au nanorods and the electron-sink function of Pt nanoparticles. This work provides an insight into the improvement of photocatalytic performance via combination of NIR-responsive plasmon metal with photocatalysts. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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