罗丹明B
催化作用
化学
反应速率常数
钴
材料科学
无机化学
金属有机骨架
吸附
碳纤维
石墨
光化学
降级(电信)
动力学
有机化学
光催化
复合数
复合材料
计算机科学
物理
电信
量子力学
作者
Peng Liu,Dengjie Zhong,Yunlan Xu,Nianbing Zhong,HE Guang-jun
标识
DOI:10.1016/j.jece.2021.105924
摘要
Co/Fe co-doped porous graphite carbon (Co/Fe-PGC) nanocomposites were successfully prepared by one-step pyrolysis with CoFe-MOF, in which the Co/Fe nanoparticles were uniformly coated on porous graphite carbon derived from MOF. It was used to microelectrolysis-Fenton degrade rhodamine B through the main active substance ∙OH. The color and TOC removal rate of 100 mg/L rhodamine B reached 99.41% and 64.6%, respectively, for 30 min. Rhodamine B was degraded into small molecular organic acids, alcohols and lipids by N-demethylation and chromophore cleavage, until it was finally degraded into CO2 and H2O, and no new colored organics were produced in the degradation process. The degradation process follows the first-order reaction kinetics, and its rate constant is much higher than that of the previous similar studies. The excellent catalytic performance of Co/Fe-PGC catalyst is attributed to the coupling effect of micro-electrolysis and Fenton reaction, and the acceleration of cobalt on electron transport and Fe2+ reduction. Co0/Fe0 undergoes galvanic corrosion to generate Co2+/Fe2+ and H2O2, and then these products undergo Fenton reaction to generate Co3+/Fe3+ and ∙OH, thus forming a circulating system of Co3+/Fe3+ and Co2+/Fe2+, enhancing the activation of H2O2 and ensuring the efficient degradation of RhB.
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