期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 259, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118071
关键词
Carbonate radical; Modified carbon felt cathode; H2O2 production; Radical reaction; Photoelectrocatalysis (PEC)
资金
- Shanghai International Science and Technology Cooperation Fund Project [18520744900]
- National Nature Science Foundation of China [51578332, 21776177, 21875139]
- SJTUAEMD
Carbonate widely exist in wastewater and natural water. Here we proposed an efficient refractory organics degradation method for carbonate-containing wastewater via generating carbonate radical based on a photo-electrocatalytic TNA-MCF system. In the system, TiO2 nanotube arrays (TNA) and modified carbon felt (MCF) were used as photoanode and cathode, respectively. HCO3- was used as electrolyte. The results show that the system achieved 85.78% removal rate after 120 min in rhodamine B degradation, which is 30% higher than that using SO42- as electrolyte. The excellent performance is attributed to the strong oxidation of (CO3-)-C-center dot to organics, which originates from the reactions between HCO3- and h(vb)(+) on TNA photoanode. It was also generated from the activation of HCO3- with H2O2 or O-2(center dot-) on MCF cathode. Moreover, the mechanism of (CO3-)-C-center dot formation and its efficient degradation of organics were investigated. These results demonstrate that this system has a potential application in refractory organics degradation.
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