| 초록 |
The catalytic reduction of p-Nitrophenol (p-NP) was carried out using a variety of Fe containing materials in the presence of NaBH4. Especially, nanoscale zerovalent iron (NZVI) and polycrystalline magnetite showed a remarkable catalytic activity, resulting in reductive conversion of p-NP to p-Aminophenol (p-AP). In NZVI case, we observed the disintegration of NZVI (50~100 nm) to much smaller nanoparticles (10~20 nm) by introduction of NaBH4 solution into NZVI suspension, which led to the enhanced catalytic p-NP reduction. In magnetite case, we observed a unique active surface from polycrystalline magnetite (2~5 μm) leading to the p-NP reduction, while other nanoscale magnetite in the range of 10-500 nm did not show the catalytic activity. The findings from these studies can provide fundamental knowledge on the interaction of Fe containing materials with NaBH4 and highlight the potential use of Fe for the development of novel Fe-environmental energy catalysts. |
