摘要：The characteristics and photocatalytic activity associated with the loading of Fe-N-modified TiO_2 on nickel foam were investigated, and the TiO_2 was used to degrade Rhodamine B(RhB) in wastewater. The effects of dopants and catalytic conditions on the photocatalytic activity of TiO_2 were investigated with an Up-flow three-phasefluidized bedreac- tor. The optimum degradation condition of RhB, allowing photoelectrocatalysis by the Fe-N- modified TiO_2 electrode, was determined. Furthermore, the surface morphology, particle size, and crystal structure were characterized via scanning electron microscopy and X-ray diffraction. The results revealed that the catalytic ability of the TiO_2 electrode improved significantly, and the doping of Fe can prevent the transformation of anatase-type titanium dioxide to rutile. The optimal degradation of RhB was realized under the following conditions: ratio of Fe, N, and TiO_2： 0.001:0.02:1; pH: 8.0; external biasing voltage: 2 V; degradation time: 120 min. Furthermore, an aeration rate and flow rate of 0.5 m3/h and 120 mL/min, respectively, yielded a RhB removal rate of 97.2%.
