High-crystalline g-C₃N₄ nanosheets (HC−CN) with reduced structural defects have been constructed through Ni-foam-induced thermal condensation because Ni-foam not only serves as a template for deposition of the 2D g-C₃N₄ nanosheets with high surface area to prevent stacking of g-C₃N₄ nanosheets but also acts as a catalyst to promote the polymerization and crystallization of g-C₃N₄ via effective dehydrogenation of the −NH₂ group. The obtained HC–CN exhibits superior photocatalytic performance for H₂ evolution under visible light irradiation (λ > 400 nm), which significantly benefits from the prolonged lifetime of photogenerated charge carriers and the increase of the transfer path within 2D structures of high-crystalline g-C₃N₄ nanosheets.

中文翻译：

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模板诱导高结晶GC ₃ Ñ ₄纳米片用于增强光催化ħ ₂演变

通过镍泡沫诱导的热缩合，已经构造出结构缺陷减少的高结晶gC ₃ N ₄纳米片（HC-CN），因为镍泡沫不仅用作沉积高密度2D gC ₃ N ₄纳米片的模板表面积可防止gC ₃ N ₄纳米片堆叠，但也可作为催化剂，通过-NH ₂基团的有效脱氢促进gC ₃ N ₄的聚合和结晶。所获得的HC-CN对H ₂表现出优异的光催化性能。可见光辐照（λ> 400 nm）下的碳纳米管演化，这得益于光生电荷载流子的延长寿命和高结晶gC ₃ N ₄纳米片的2D结构内传递路径的增加。