2026-09-14T14:36:33Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/49342022-05-20T13:23:23Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

Ibáñez Martínez, David Gómez, Elvira Valles, Elisa Colina Santamaría, Álvaro Heras Vidaurre, Aránzazu 2018-09-12T11:38:58Z 2018-08 2020-08 http://hdl.handle.net/10259/4934 Real-time process monitoring is still relatively scarce but is fundamental to provide in-situ information about different chemical and electrochemical processes. Particularly, electrochemical filtration has received growing attention in recent years due to the wide range of applications in which it can be successfully employed. Electrochemical removal is considered as an attractive methodology for the treatment of wastewater due to its efficiency in the removal of a huge number of contaminants. In this work, the development of a new device based on the use of UV–vis bare optical fibers in long optical pathway configuration allows us to monitor continuously the electrochemical degradation process during the filtration of different compounds. Spectroelectrochemistry additionally supplies quantitative information allowing us to calculate the efficiency of the electrochemical filtration process. The material selected to fabricate the electrochemical filter was single-walled carbon nanotubes that display not only high physical and chemical stability, but also high electrical conductivity. Therefore, the combination of electrochemical degradation methods, free-standing single-walled carbon nanotube filters and operando spectroelectrochemical techniques makes this outstanding device very interesting in the study of different molecules. As proof of concept, three different systems have been studied to validate the cell and demonstrate the good performance of the spectroelectrochemical device: o-tolidine (reference system), indigo carmine (organic dye), and 4-nitrophenol (hazardous pollutant). Ministerio de Economía y Competitividad (CTQ2014-61914-EXP, CTQ2014-55583-R, TEC2017-85059-C3-2-R, CTQ2015-71955-REDT) and Junta de Castilla y León (BU033-U16) application/pdf eng Elsevier Electrochimica Acta. 2018 V. 280, p. 17-24 https://doi.org/10.1016/j.electacta.2018.05.062 info:eu-repo/grantAgreement/JCyL/BU033-U16 info:eu-repo/grantAgreement/MINECO/CTQ2014-61914-EXP info:eu-repo/grantAgreement/MINECO/CTQ2014-55583-R info:eu-repo/grantAgreement/MINECO/TEC2017-85059-C3-2-R info:eu-repo/grantAgreement/MINECO/CTQ2015-71955-REDT Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Real-time monitoring Electrochemical filters UV–vis spectroelectrochemistry Single-walled carbon nanotubes Pollutants Química analítica Chemistry, Analytic Spectroelectrochemical monitoring of contaminants during the electrochemical filtration process using free-standing carbon nanotube filters info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion