Preparation and application of electro-catalytic material Fe₂O₃-ZnO/C

Abstract

Electro-catalysts Fe₂O₃ compounded by ZnO were prepared by a sol-gel method, which were titled as Fe₂O₃-ZnO. Electro-catalysts Fe₂O₃-ZnO loading on the bamboo charcoal was titled as Fe₂O₃-ZnO/C. The catalytic materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The obtained catalysts were assembled to three-dimensional electrodes to degradation of chlorinated organic in paper wastewater. And the performance tests show that three-dimensional electrodes have high activities for degradation of chlorinated organic in paper wastewater. There are many factors affecting the electro-catalytic performances of the three-dimensional electrodes. And the orthogonal experiment results show that the optimum operating condition is as follows: the calcination time of the catalysts 2 h, the mass ratio of Fe to Zn 4:1, the voltage 12 V, the mass of the catalytic materials 6 g, the value of pH 9, and the treating time 2.5 h. Under these conditions, the optimum removal efficiency of chlorinated organics in paper wastewater is 47.58%.

Keywords

electro-catalyst / Fe₂O₃-ZnO / bamboo charcoal / chlorinated organic / paper wastewater

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