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石墨毡在电芬顿工艺中作为阴极和阳极的性能。

Performance of graphite felt as a cathode and anode in the electro-Fenton process.

作者信息

Li Junfeng, Song Dongbao, Du Keqing, Wang Zhaoyang, Zhao Chun

机构信息

College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang China

College of Earth and Environmental Science, Lanzhou University Lanzhou 730000 PR China.

出版信息

RSC Adv. 2019 Nov 25;9(66):38345-38354. doi: 10.1039/c9ra07525a.

DOI:10.1039/c9ra07525a
PMID:35540201
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9075911/
Abstract

Choosing an electrode material with good performance and low cost is of great significance for the practical application of the electro-Fenton process. In this study, graphite felt was systematically studied to determine its application performance in an electro-Fenton system. The influence of operating parameters, pH and voltage, on the HO yield and the evolution of iron ions was investigated, which helped to select the optimal parameter values. The removal rate of methylene blue was 97.8% after 20 min electrolysis under the conditions of 7 V voltage and pH 3. Inhibition experiments showed the graphite felt E-Fenton system mainly relied on the indirect oxidation of ·OH and the direct oxidation of the graphite felt anode to degrade the methylene blue. The graphite felt showed good stability as a cathode during repeated use, but the anode conductivity and catalytic performance were decreased, and the adsorption performance was enhanced. Finally, the graphite felt electrode was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS) to preliminarily analyze the reason for the change in anode performance.

摘要

选择性能良好且成本低廉的电极材料对于电芬顿工艺的实际应用具有重要意义。在本研究中，对石墨毡进行了系统研究，以确定其在电芬顿系统中的应用性能。研究了操作参数、pH值和电压对羟基自由基（·OH）产率和铁离子演变的影响，这有助于选择最佳参数值。在7V电压和pH值为3的条件下电解20分钟后，亚甲基蓝的去除率为97.8%。抑制实验表明，石墨毡电芬顿系统主要依靠·OH的间接氧化和石墨毡阳极的直接氧化来降解亚甲基蓝。石墨毡作为阴极在重复使用过程中表现出良好的稳定性，但阳极的导电性和催化性能下降，吸附性能增强。最后，通过扫描电子显微镜（SEM）、X射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）和X射线光电子能谱（XPS）对石墨毡电极进行表征，初步分析阳极性能变化的原因。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/a678f12fa60e/c9ra07525a-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/8f4e1c374d92/c9ra07525a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/c27ec9e80181/c9ra07525a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/670d3d22a83e/c9ra07525a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/a678f12fa60e/c9ra07525a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/d6ad31b99f16/c9ra07525a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/56d0e34e34c5/c9ra07525a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/982c213949ac/c9ra07525a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/e68ea9f3433f/c9ra07525a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/8f4e1c374d92/c9ra07525a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/c27ec9e80181/c9ra07525a-f6.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ef88/9075911/a678f12fa60e/c9ra07525a-f8.jpg

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