Fig. 1.

Preparation process of L-PCN nanowire arrays. The quadrangular-like hydrogen-bonded supermolecular precursor is easily prepared by molecular cooperative assembly. Meanwhile, phosphoric acid molecules will be wrapped in or adsorbed on the precursors. After annealing, hierarchical self-assembly of CN nanowire arrays with well-defined louver-like nanostructures (L-CN) is eventually generated through releasing various gas, such as NH₃, NO/NO₂, and PH₃, and the P atoms are successfully doped in the internal framework