Development of a Three-Dimensional Structured Carbon Fiber Felt/β-PbO2 Electrode and Its Application in Chemical Oxygen Demand Determination

Autor:	Pingyu Wan, Jia Liu, Linying Zhang, Yongmei Chen, Lei Wang, Yuanyuan Zhang, Dandan Kong, Yang Tang, Hengliang Mo, Lixin Xing, Yanzhi Sun, Tangqiang Sun, Wang Xizhi, Xin Xu, Huining Cheng, Nan Wang, Man Zhang, Shuangyan Liu, Yang Jiang, Meng Xiaodong
Rok vydání:	2015
Předmět:	Detection limit Reproducibility Materials science Correlation coefficient General Chemical Engineering Chemical oxygen demand Nanotechnology chemistry.chemical_compound Microcrystalline chemistry Chemical engineering Linear range Electrode Electrochemistry Hydroxyl radical
Zdroj:	Electrochimica Acta. 176:1100-1107
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2015.07.126
Popis:	A three-dimensional (3-D) structured sensor of microcrystalline β-PbO2-coated carbon felt consisting of crisscrossing carbon fibers has been developed to determine chemical oxygen demand in wastewater. Each carbon fiber in the felt is coated by perfect octahedral β-PbO2 microcrystals. The unique structure makes it possess huge surface area and abundant active sites for generating hydroxyl radicals, thus exhibiting excellent performances. Results show a RSD within 5% as compared with the traditional standard method, a high sensitivity of 2.05 × 10−3 mA cm−2/mg L−1, a wide linear range of 50-5000 mg L−1, a correlation coefficient (R) of 0.993 and a detection limit of 3.9 mg L−1 (S/N = 3). Additionally, this electrode demonstrates excellent reproducibility, low cost and good stability. These properties enable the electrode to be used as a COD sensor for in situ determination in industry, showing a promising application perspective.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5dd4c12da289901878076a46eb374fb8 https://doi.org/10.1016/j.electacta.2015.07.126 Zobrazit plný text záznamu Full Text from ScienceDirect