Peptide self-assembly is a facile route to the development of bioorganic hybrid materials that have sophisticated nanostructures toward diverse applications. Here, we report the synthesis of self-assembled peptide (Fmoc-diphenylalanine, Fmoc-FF)/graphitic carbon nitride (g-C₃N₄) hydrogels for light harvesting and biomimetic photosynthesis through noncovalent interactions between aromatic rings in Fmoc-FF nanofibers and tris-s-triazine in g-C₃N₄ nanosheets. According to our analysis, the photocurrent density of the Fmoc-FF/g-C₃N₄ hydrogel was 1.8× higher (0.82 μA cm^–1) than that of the pristine g-C₃N₄. This is attributed to effective exfoliation of g-C₃N₄ nanosheets in the Fmoc-FF/g-C₃N₄ network, facilitating photoinduced electron transfers. The Fmoc-FF/g-C₃N₄ hydrogel reduced NAD⁺ to enzymatically active NADH under light illumination at a high rate of 0.130 mol g^–1 h^–1 and drove light-responsive redox biocatalysis. Moreover, the Fmoc-FF/g-C₃N₄ scaffold could well-encapsulate key photosynthetic components, such as electron mediators, cofactors, and enzymes, without noticeable leakage, while retaining their functions within the hydrogel. The prominent activity of the Fmoc-FF/g-C₃N₄ hydrogel for biomimetic photosynthesis resulted from the easy transfer of photoexcited electrons from electron donors to NAD⁺ via g-C₃N₄ and electron mediators as well as the hybridization of key photosynthetic components in a confined space of the nanofiber network.

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自组装肽碳氮化物水凝胶作为光响应支架材料

肽自组装是开发具有复杂纳米结构的生物有机杂化材料的简便途径，可用于各种应用。在这里，我们报告通过Fmoc-FF纳米纤维和tris中芳香环之间的非共价相互作用，合成用于光收集和仿生光合作用的自组装肽（Fmoc-二苯丙氨酸，Fmoc-FF）/石墨化碳氮化物（gC ₃ N ₄）水凝胶的合成。-S-三嗪在gC ₃ N ₄纳米片中。根据我们的分析，Fmoc-FF / gC ₃ N ₄水凝胶的光电流密度比原始gC ₃ N ₄高1.8倍（0.82μAcm ^–1）。。这归因于Fmoc-FF / gC ₃ N ₄网络中gC ₃ N ₄纳米片的有效剥落，促进了光诱导的电子转移。Fmoc-FF / gC ₃ N ₄水凝胶在光照射下以0.130 mol g ^–1 h ^–1的高速率将NAD ⁺还原为具有酶活性的NADH，并推动了光响应性氧化还原生物催化作用。此外，Fmoc-FF / gC ₃ N ₄支架可以很好地封装关键的光合作用成分，例如电子介体，辅因子和酶，而不会出现明显的泄漏，同时在水凝胶中保留其功能。Fmoc-FF / gC ₃ N ₄水凝胶对仿生光合作用的显着活性是由于光激发电子易于通过gC ₃ N ₄和电子介体从电子供体转移到NAD ⁺以及关键光合作用成分的杂交。纳米纤维网络的狭窄空间。