Natural leaves are virtually two-dimensional (2D) flexible photocatalytic system. In particular, seagrass can efficiently harvest low-intensity sunlight to drive photochemical reactions continuously in an aqueous solution. To mimic this process, we present a novel 2D hydrogel-integrated photocatalytic sheet based on free-standing nanoassemblies of multifunctional nanohexagons (mNHs). The mNHs building blocks is made of plasmonic gold nanohexagons (NHs) decorated with Pd nanoparticles in the corners and CdS nanoparticles throughout their exposed surfaces. The mNHs can self-assemble into free-standing 2D nanoassemblies and be integrated with thin hydrogel films, which can catalyze chemical reactions under visible light illumination. Hydrogels are translucent, porous, and soft, allowing for continuous photochemical conversion in an aqueous environment. Using methylene blue (MB) as a model system, we demonstrate a soft seagrass-like photodegradation design, which offers high efficiency, continuous operation without the need of catalyst regeneration, and omnidirectional light-harvesting capability under low-intensity sunlight irradiation, defying their rigid substrate-supported random aggregates and solution-based discrete counterparts.

中文翻译：

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基于水凝胶集成的多功能纳米六边形独立二维纳米组件的海草启发式软光催化片设计

天然树叶实际上是二维 (2D) 柔性光催化系统。特别是，海草可以有效地收集低强度阳光，以在水溶液中连续驱动光化学反应。为了模拟这一过程，我们提出了一种基于多功能纳米六边形 (mNHs) 的独立纳米组件的新型二维水凝胶集成光催化片。mNHs 构件由等离子金纳米六边形 (NHs) 制成，其角落处装饰有 Pd 纳米颗粒，而其暴露表面则装饰有 CdS 纳米颗粒。mNHs 可​​以自组装成独立的二维纳米组件，并与水凝胶薄膜集成在一起，可以在可见光照射下催化化学反应。水凝胶是半透明的、多孔的、柔软的，允许在水环境中进行连续的光化学转化。以亚甲蓝 (MB) 为模型系统，我们展示了一种类似海草的软光降解设计，该设计具有高效率、无需催化剂再生即可连续运行，以及在低强度太阳光照射下的全向集光能力，无视它们的性能。刚性基板支持的随机聚集体和基于溶液的离散对应物。