Preparation and characterization of porous Fe-Cu mixed oxides modified ZSM-5 coating/PSSF for continuous degradation of phenol wastewater

Abstract

The porous Fe-Cu mixed oxides modified ZSM-5 coating/PSSF (paper-like sintered stainless steel fibers) catalysts were synthesized for the continuous degradation of phenol by means of catalytic wet peroxide oxidation. The catalysts were firstly characterized by XRD, N2 adsorption-desorption, SEM and EDS. Then, the activity of the catalysts was evaluated in a continuous reactor at the temperature of 80 °C under atmospheric pressure. The results indicated that phenol conversion of 100% and H2O2 conversion of 98% was obtained and the phenol can be oxidized into organic acids directly without toxic quinones by-products detected. The increase of Cu element can obviously increase the catalytic activity of FeCu-ZSM-5 coating/PSSF catalyst, and the doped of Cu element can effectively increase the stability of Fe active component. H2-TPR and XPS experiments were further carried out to investigate the interactions of the bimetallic component. Finally, catalytic reaction mechanisms of the phenol degradation over the catalysts were proposed. The excellent catalytic activity of the FeCu-ZSM-5 catalysts was resulted from synergistic effect of the Cu, Fe active component and high contacting efficiency of the ZSM-5 coating/PSSF support.