Two-dimensional (2D) graphitic-C₃N₄ (g-C₃N₄) was successfully hybridized with one-dimensional (1D) flux-grown Na-modified K₂Ti₆O₁₃ nanobelts (Na-K₂Ti₆O₁₃ NBs) for the first time to construct novel 1D/2D Na-K₂Ti₆O₁₃/g-C₃N₄ heterostructured photocatalysts using a facile mixing–calcination method. The heterostructured Na-K₂Ti₆O₁₃/g-C₃N₄ composites with three-dimensional (3D) hybrid architectures exhibited a remarkably enhanced photocatalytic efficiency for organic pollutant degradation in comparison with pure Na-K₂Ti₆O₁₃ and g-C₃N₄ under both simulated sunlight and visible-light irradiation (λ > 420 nm), which could be mainly attributed to the synergistic effects between Na-K₂Ti₆O₁₃ and g-C₃N₄ including more efficient interfacial charge transfer, longer lifetimes and the stronger oxidation and reduction ability of photogenerated charge carriers, fundamentally originating from the formation of Na-K₂Ti₆O₁₃/g-C₃N₄ heterojunctions based on the well-matched energy-band structures. Moreover, the Na-K₂Ti₆O₁₃/g-C₃N₄ hybrids showed good stability and reusability for the photocatalytic degradation of organic pollutants. Finally, the possible mechanisms responsible for the improved simulated sunlight and visible-light photocatalytic performance were also investigated, respectively, based on the results of PL spectra, time-resolved fluorescence decay spectra, radical species trapping experiments, ESR spectra and PL-TA measurements. Overall, this work will not only be beneficial for the design and development of more efficient visible-light-responsive g-C₃N₄-based composites for solar energy conversion and environmental remediation but will also be influential in optimizing the visible-light photocatalytic activity of wide-band-gap 1D titanate nanomaterials to meet the requirements of practical applications.

中文翻译：

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与1D助熔剂生长的Na修饰的K ₂ Ti ₆ O ₁₃纳米带杂交的2D石墨C ₃ N ₄，以增强模拟的阳光和可见光的光催化性能

二维（2D）石墨C ₃ N ₄（gC ₃ N ₄）与一维（1D）助熔剂生长的Na修饰的K ₂ Ti ₆ O ₁₃纳米带（Na-K ₂ Ti ₆ O ₁₃）成功杂交NBs）首次使用简便的混合煅烧方法构建新型1D / 2D Na-K ₂ Ti ₆ O ₁₃ / gC ₃ N ₄异质结构光催化剂。异质结构Na-K ₂ Ti ₆ O ₁₃ / gC ₃ N ₄具有三元（3D）杂化结构的复合材料在模拟阳光和可见光照射下，与纯Na-K ₂ Ti ₆ O ₁₃和gC ₃ N ₄相比，对有机污染物的降解具有显着增强的光催化效率（λ > 420 nm），这可能主要归因于Na-K ₂ Ti ₆ O ₁₃与gC ₃ N ₄之间的协同作用包括更有效的界面电荷转移，更长的寿命以及光生电荷载流子的更强的氧化和还原能力，这主要源自于基于良好匹配的能带的Na-K ₂ Ti ₆ O ₁₃ / gC ₃ N ₄异质结的形成结构。此外，Na-K ₂ Ti ₆ O ₁₃ / gC ₃ N ₄杂种对光催化降解有机污染物表现出良好的稳定性和可重复使用性。最后，根据PL光谱，时间分辨荧光衰减光谱，自由基种类捕获实验，ESR光谱和PL-TA测量结果，分别研究了改善模拟阳光和可见光光催化性能的可能机理。 。总体而言，这项工作不仅会有益于更高效的可见光响应gC ₃ N ₄的设计和开发。基复合材料用于太阳能转换和环境修复，但也将对优化宽带隙一维钛酸酯纳米材料的可见光光催化活性产生影响，以满足实际应用的要求。