Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 165, Issue -, Pages 360-368Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.09.074
Keywords
KOH activation; Graphite felt; Electro-Fenton; H2O2 accumulation; DMP degradation
Funding
- Natural Science Foundation of China [21107145, 21077136]
- project of Pearl River Science and Technology New Star of Guangzhou [2011Z220061]
- Fundamental Research Funds for the Central Universities of China [12lgpy13]
- Fund for Fostering Talents in National Basic Science
- European Union
- Greek Ministry of Education-GSRT
Ask authors/readers for more resources
In the present investigation, graphite felt (GF) activated by KOH at high temperature is adopted as the electro-Fenton cathode for degrading organic pollutants contained in the wastewater. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and contact angle results show that through KOH activation the raw graphite felt (RGF) could be provided with: (i) higher surface area, (ii) more oxygen-containing functional groups, and (iii) more hydrophilicity. Experimental results show that H2O2 accumulation concentration reaches the maximal value at -0.7V of applied cathode potential and the apparent rate constant for dimethyl phthalate (DMP) degradation at the AGF-900 (optimized activation conditions: at 900 degrees C for 1 h) is 0.198 min(-1), much higher than that (0.020 min(-1)) obtained at the RGF (similar to 900% of enhancement). In the meanwhile, AGF-900 possesses good stability without significant performance decay even after 20 reaction cycles and desirable universality for degrading other organic contaminants. Moreover, the comparison with other commonly used materials confirms the effectiveness of AGF-900 as the electro-Fenton cathode. From the obtained results it is shown that KOH activation at high temperature is a desirable way to decorate graphite felt with more functional groups and then make it more applicable as the electro-Fenton cathode to remove organic pollutants in wastewater. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available