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In-situ incorporation of iron-copper bimetallic particles in electrospun carbon nanofibers as an efficient Fenton catalyst

2017; Elsevier BV; Volume: 207; Linguagem: Inglês

10.1016/j.apcatb.2017.02.032

1873-3883

Jing Wang, Chao Liu, Jiansheng Li, Rui Luo, Xingru Hu, Xiuyun Sun, Jinyou Shen, Weiqing Han, Lianjun Wang,

Supercapacitor Materials and Fabrication

Iron-copper bimetallic nanoparticles supported on carbon nanofibers as a composite catalyst (FeCu/CNF) was prepared for the first time in this work. The iron-copper bimetallic nanoparticles were formed in situ by carbothermic reduction during the carbonization process. The characterization results show that the FeCu/CNF possesses fibrous morphology, porous structure with high specific surface area, and dispersed iron-copper nanoparticles. For comparison, three other catalysts, including solely iron nanoparticles supported on carbon nanofibers (Fe/CNF), solely copper nanoparticles supported on carbon nanofibers (Cu/CNF) and iron-copper nanoparticles supported on blocky carbon matrixes (FeCu/C) were also prepared. The heterogeneous Fenton catalytic performance of synthesized catalyst was evaluated by degradating a typical azo dye, Acid Orange II (AOII). The results show that almost 97.7% of 100 mg/L AOII is removed by FeCu/CNF in reaction time of 1 h, which is much higher than those of comparison catalysts operated in the same experimental condition. Additionally, the FeCu/CNF also reveals a wider pH adaptation ability compared with Fe/CNF. Based on the results of OH detection and resistance of mass transfer testing in catalysts, the remarkable catalytic performance of FeCu/CNF is considered as the synergistic effect of iron and copper and the superiority of nanofibrous structure in catalyst. The good stability and recoverability of FeCu/CNF were also demonstrated. The as-synthesized catalyst is proved to be an attractive candidate in heterogeneous Fenton chemistry.