Localized surface plasmon resonance (LSPR) photocatalysts for water splitting have attracted extensive interests. Noble metal LSPR materials suffer from high costs and negative impacts to environment, while metal-free materials usually have low efficiencies. In this work, we demonstrate that one-dimensional carbon nanotubes/two-dimensional ultrathin carbon nitride (1D SWCNT/2D C₃N₄) can serve as non-resonant plasmonic photocatalysts. The catalyst shows a stoichiometric production of H₂ (49.8 μmol g⁻¹ h⁻¹) and O₂ (22.8 μmol g⁻¹ h⁻¹) in overall water splitting, with a prominent H₂ production rate of 1346 μmol g⁻¹ h⁻¹. The significantly enhanced photocatalysis is attributed to the non-resonant plasmonic effect, as confirmed by the increased spectral response within both ultraviolet and visible light regions, and the results of finite element method simulation. Moreover, the contributions from ultrathin morphology, long average carrier lifetime (2.54 ns), and the electronic coupling effect of the nanohybrids collectively intensify the photocatalytic water splitting.

用于水分解的局部表面等离子体共振（LSPR）光催化剂引起了广泛的兴趣。贵金属LSPR材料的成本高昂，并且会对环境造成负面影响，而不含金属的材料通常效率较低。在这项工作中，我们证明一维碳纳米管/二维超薄氮化碳（1D SWCNT / 2D C ₃ N ₄）可以用作非共振等离子体激元光催化剂。催化剂在整个水分解过程中显示出化学计量的H ₂（49.8μmolg ^-1 h ^-1）和O ₂（22.8μmolg ^-1 h ^-1）的生成，其中H _2明显。生产速率为1346μmolg ^-1 h ^-1。紫外和可见光区域内光谱响应的增加以及有限元方法模拟的结果证实了光催化的显着增强归因于非共振等离子体效应。此外，超薄形态，较长的平均载流子寿命（2.54 ns）以及纳米杂化物的电子耦合效应共同促进了光催化水分解。