Magnetic graphite oxide as efficient catalyst for electrochemical treatment of printing and dyeing wastewater
FU Ming-hao1, LU Jun1, CHENG Quan-yuan1,2, LIU Xiao-chen1, ZHENG Hua1
1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; 2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
Abstract：Magnetic graphite oxide (MGO) catalyst was synthesized using potassium ferrate as iron precursor and oxidizing graphite oxide mineral. It was used to fabric cathode (MGO/CB) by adding carbon black (CB) on a carbon fibre cloth substrate, which can reduce dissolved oxygen to produce reactive oxygen species (ROS) for the treatment of simulated wastewater containing reactive red X-3B dye. The morphology and electrochemical properties of MGO were measured by scan electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical working station. The surface of the lamellar MGO possessed iron oxide nanoparticles with different crystal structures. These active species showed synergistic effect in electrocatalysis. The crystal phase and catalytic activity of ferric oxide were influenced by calcination temperature. At 300oC of calcination, MGO/CB cathode exhibited high electrochemical treatment efficiency for reactive red X-3B degradation. It was found that 1O2 and ·O2- were dominant ROS. The decolorization reached 100% and CODcr removal reached 77.1% in 4h of electrolysis. Magnetic graphite oxide was stable and can be reused in successive cycles.
伏明浩, 卢钧, 陈泉源, 刘晓琛, 郑华. 磁性氧化石墨电催化活性及净化印染废水效能[J]. 中国环境科学, 2022, 42(4): 1672-1680.
FU Ming-hao, LU Jun, CHENG Quan-yuan, LIU Xiao-chen, ZHENG Hua. Magnetic graphite oxide as efficient catalyst for electrochemical treatment of printing and dyeing wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1672-1680.
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