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篇目详细内容 |
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【篇名】 |
Electrocatalytic debromination of BDE-47 at palladized graphene electrode |
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【刊名】 |
Frontiers of Environmental Science and Engineering in China |
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【刊名缩写】 |
Front.Environ.Sci.Engin.China |
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【ISSN】 |
2095-2201 |
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【EISSN】 |
2095-221X |
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【DOI】 |
10.1007/s11783-013-0552-x |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2014 |
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【卷期】 |
8
卷2期 |
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【页码】 |
180-187
页,共
8
页 |
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【作者】 |
Hongtao YU;
Bin MA;
Shuo CHEN;
Qian ZHAO;
Xie QUAN;
Shahzad AFZAL;
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【关键词】 |
graphene; palladium; debromination; BDE-47 |
【摘要】 |
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Graphene electrodes (Ti/Gr) were prepared by depositing Gr sheets on Ti substrate, followed by an annealing process for enhancing the adhesion strength. Electrochemical impedance spectroscopies and X-ray diffraction patterns displayed that the electrochemical behavior of Ti/Gr electrodes can be improved due to the generation of TiO2 layer at Ti-Gr interface during the annealing process. The palladized Gr electrodes (Ti/Gr/Pd) were prepared by electrochemical depositing Pd nanoparticles on Gr sheets. The debromination ability of Ti/Gr/Pd electrodes was investigated using BDE-47 as a target pollutant with various bias potentials. The results indicated that the BDE-47 degradation rates on Ti/Gr/Pd electrodes increased with the negative bias potentials from 0？V to ？0.5？V (vs. SCE). Almost all of the BDE-47 was removed in the debromination reaction on the Ti/Gr/Pd electrode at ？0.5？V for 3？h, and the main product was diphenyl ethers, meaning it is promising to debrominate completely using the Ti/Gr/Pd electrode. Although the debromination rate was slightly slower at ？0.3？V than that under ？0.5？V, the current efficiency at ？0.3？V was higher, because the electrical current acted mostly on BDE-47 rather than on water. |
