One-pot solvothermal preparation of ethylenediamine-functionalized nanochain and its adsorption-in situ degradation of 2,4,6-trichlorophenol

摘要

An ethylenediamine (EDA)-functionalized Fe3O4 magnetic nanochain (EDA@nFe(3)O(4)) was synthesized by one-pot solvothermal method. The EDA@nFe(3)O(4) was characterized by elementary analysis, powder X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometer. Its application for adsorption and degradation of 2,4,6-trichlorophenol (2,4,6-TCP) was investigated. The results show that the EDA@nFe(3)O(4) has an average size of similar to 150 nm, and self-assembled to be a nanochain, with the saturation magnetization intensity of 46.8 emu/g. The adsorption capacity of EDA@nFe(3)O(4) is found to be 902.5 mg/g when the initial concentration of 2,4,6-TCP at 1,000 mg/L. The adsorption processes fit the Freundlich isotherms well. The adsorption processes reach the equilibrium within 5 min and the kinetic data are well fitted to the pseudo-second-order model. The post-adsorbed material was added to Fe3+-H2O2 system. In situ degradation of 2,4,6-TCP via Fenton-like reaction under visible light can be realized. The results indicate that at pH 3.0-8.0, the degradation of 2,4,6-TCP with loading concentration at 6.20-122.2 mg/g can be reached to almost 100% within 5 min. EDA@nFe(3)O(4) can be reused after regeneration. It is a potential effective and reusable material for adsorption and degradation of 2,4,6-TCP.