Structure and excellent visible light catalysis of Prussian blue analogues BiFe(CN)(6)center dot 4H(2)O

摘要

Photo-Fenton catalysis with high-efficiency is required for the resolution of environmental pollution. Here, the Prussian blue analogue BiFe(CN)(6)center dot 4H(2)O with a narrow bandgap (1.63 eV) shows excellent visible light catalysis to decompose organic dyes and tetracycline. The microrod and nanoplate morphologies were successfully synthesized by simple precipitation with different additives. The nanoplates of BiFe (CN)(6)center dot 4H(2)O show excellent phono-Fenton catalytic activity meaning that RhB can be decomposed within 6 min in the presence of H2O2. BiFe(CN)(6)center dot 4H(2)O exhibits a layered structure, which consists of FeC6 and BiN6 coordination polyhedra. The zero field cooling indicated that BiFe(CN)(6)center dot 4H(2)O has an anti-ferromagnetic order at low temperatures. Furthermore, the stability of the BiFe(CN)(6)center dot 4H(2)O catalyst is very good, which has been investigated by various characterizations. The mechanism of the excellent catalysis is related to the crucial role of H2O2, which inhibits the recombination of the electron-hole pair and drives the photo-Fenton reaction. Therefore, to treat the wastewater by photo-Fenton catalysis, the present component of BiFe(CN)(6)center dot 4H(2)O is a promising catalyst candidate.