Two‐Dimensional (2D) Porous Zinc Oxides Derived from the Coordination Polymer via Chemical‐Assisted Phase Transition

Abstract

Two-dimensional (2D) porous zinc oxides (ZnO) were successfully prepared via chemical treatment and thermal annealing of coordination polymers (CPs) precursors consisting of Zn(II) ion and fumarate ligand. The morphology, crystalline phase, chemical state, and surface area of the resultant ZnO were characterized. It is experimentally discovered that the crystal phase of the CP bearing Zn(II) ions is transformed to the zinc hydroxide crystal phase by chemical treatment using ammonia water. The prepared CP-derived porous 2D ZnO exhibited enhanced photocatalytic efficiency for dye degradation under black-light irradiation (365 nm) compared to CP-derived nonporous ZnO without a chemical-assisted phase transition process.