| 초록 |
Researchers have been trying to functionalize polymer-based 3-D inverse opal structures to utilize their unique 3-D geometric properties for various applications including optics, separation and piezoelectric devices. However, functionalization is still challenging due to the limited diffusion of water-based precursor solutions into the intrinsically hydrophobic 3-D inverse opal nanostructures. In this study, we demonstrated a simple polydopamine (PD) and silver nitrate dip-coating method for functionalizing polymeric 3-D inverse opal structures for use as catalytic membranes. This facile PD coating not only improves the hydrophilicity of the inverse opal structure for the infiltration of precursor solution (i.e. silver), but also provides nucleation sites for the reduction of silver nanoparticles. Finally, these PD-silver nanoparticle decorated 3D-inverse opal films are applied as catalytic membranes for the reduction of 4-nitrophenol to its amino derivatives in the presence of NaBH4. Combining silver nanoparticles with materials with large specific area such as 3-D inverse opals, yields remarkable catalytic membrane performance, simultaneously indicating a high flux and high conversions under proper conditions. |
