Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10389718 | Separation and Purification Technology | 2015 | 8 Pages |
Abstract
A polyacrylonitrile-based carbon fiber brush (PAN-CFB) was electrochemically modified and efficiently used as cathode for H2O2 electrogeneration in electro-Fenton process. H2O2 generation performance and energy consumption for PAN-CFB cathode before and after modification were evaluated and compared. For electrochemically modified PAN-CFB (EMPAN-CFB) cathode, the maximal H2O2 concentration (approx. 80 mg Lâ1 by 1000 C charge, >90% current efficiency) appeared at â0.4 and â0.5 V vs. SCE, a ca. 500 mV positive shift compared with the pristine one, showing desirable stability without performance decay after 30 cycles utilization. Moreover, the influence of the distance between anode and cathode as well as the electrolyte concentration on the energy consumption for H2O2 generation was investigated, with obviously reduced energy consumption for the EMPAN-CFB cathode. Finally, methyl orange was decolorized via electro-Fenton process using the EMPAN-CFB cathode and rapid color removal was accomplished in 5 min following the pseudo-first-order kinetic model with high correlation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Guangsen Xia, Yonghong Lu, Haibo Xu,