Near-infrared response Pt-tipped Au nanorods/g-C3N4 realizes photolysis of water to produce hydrogen. (20th August 2022)

• Record Type: Journal Article
• Authors: Guo, Yang; Zhou, Qixin; Chen, Xiaolin; Fu, Yunzhi; Lan, Shenyu; Zhu, Mingshan; Du, Yukou
• Is Part Of: Journal of materials science & technology. Volume 119(2022)
• Page Start: 53
• Page End: 60
• Publication Date: 2022-08-20
• Subjects: Near infrared response -- Photocatalysis -- H2 evolution -- g-C3N4 -- Pt-tipped Au nanorods; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.11.067
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: Ternary Pt-tipped Au nanorods/g-C3 N4 (Pt-Au/CN) heterostructure is constructed. Pt-Au/CN shows H2 evolution with a rate of 51.6 μ mol g −1 h −1 in the NIR region. Pt-tipped Au nanorods shows two functions in photolysis of water to produce H2 . Abstract: The search for a suitable cocatalyst for graphitic carbon nitride (g-C3 N4 ) to realize efficient photocatalytic hydrogen (H2 ) 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-C3 N4 heterostructure is constructed, which shows excellent H2 production performance in visible and near-infrared (NIR) region, especially in NIR region with a rate of 51.6 μmol g −1 h −1 . Therein, not only is the optical absorption ability of g-C3 N4 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 H2 evolution. Compared with bare g-C3 N4, 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.