Preparation of efficient photocatalysts with ease of recovery in solar fuel generation is highly desired to achieve carbon neutralization in carbon dioxide (CO₂) emissions. Inspired from the forest with superior light penetration and fast gas transport, a TiO₂/g-C₃N₄ composite nanowire arrays (NAs) film with maximized light utilization is devised. It is achieved by in-situ coating a thin layer of g-C₃N₄ (as the leaf) on the vertically-oriented TiO₂ arrays (as tree trunks) on Ti foil (as soil). Benefiting from the effective charge separation by S-scheme charge transfer, intimate contact by the in-situ growth as well as the ingenious structure, the composite, readily recyclable, displays exciting performance in photocatalytic CO₂ reduction. It is beyond doubt that the combination of heterojunction construction and “nature-inspired biomimetic photocatalyst” design promises practical applications and industrial use.

非常需要在太阳能燃料发电中制备易于回收的高效光催化剂，以实现二氧化碳 (CO ₂ ) 排放中的碳中和。受具有卓越光穿透和快速气体传输的森林的启发，设计了具有最大化光利用率的 TiO ₂ /gC ₃ N ₄复合纳米线阵列 (NAs) 薄膜。它是通过在Ti 箔（作为土壤）上的垂直取向的 TiO ₂阵列（作为树干）上原位涂覆一层薄薄的 gC ₃ N ₄（作为叶子）来实现的。受益于 S 型电荷转移的有效电荷分离，原位接触增长以及巧妙的结构，复合材料，易于回收，在光催化 CO ₂还原方面表现出令人兴奋的性能。毫无疑问，异质结结构与“仿生光触媒”设计的结合有望实现实际应用和工业用途。