Fig. 3From: A Facile One-Pot Synthesis of Biomimetic Photocatalyst Zn(II)-Porphyrin-Sensitized 3D TiO2 Hollow Nanoboxes and Synergistically Enhanced Visible-Light DegradationThe proposed formation process of Zn(II) porphyrin sensitized TiO2-HNBs (ZnTCP@TiO2-HNBs)Back to article page