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Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast
The key component of electrochemical advanced oxidation technology are high-efficiency anodes, and highly efficient and simple-to-prepare materials have generated a lot of interest. In this study, novel self-supported Ti(3+)-doped titanium dioxide nanotube arrays (R-TNTs) anodes were successfully pr...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254203/ https://www.ncbi.nlm.nih.gov/pubmed/37297106 http://dx.doi.org/10.3390/ma16113971 |
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author | Wang, Pengqi Chu, Guangyi Gao, Guangfei Li, Fengchun Ren, Yi Ding, Yue Gu, Yawei Jiang, Wenqiang Zhang, Xuan |
author_facet | Wang, Pengqi Chu, Guangyi Gao, Guangfei Li, Fengchun Ren, Yi Ding, Yue Gu, Yawei Jiang, Wenqiang Zhang, Xuan |
author_sort | Wang, Pengqi |
collection | PubMed |
description | The key component of electrochemical advanced oxidation technology are high-efficiency anodes, and highly efficient and simple-to-prepare materials have generated a lot of interest. In this study, novel self-supported Ti(3+)-doped titanium dioxide nanotube arrays (R-TNTs) anodes were successfully prepared by a two-step anodic oxidation and straightforward electrochemical reduction technique. The electrochemical reduction self-doping treatment produced more Ti(3+) sites with stronger absorption in the UV-vis region, a band gap reduction from 2.86 to 2.48 ev, and a significant increase in electron transport rate. The electrochemical degradation effect of R-TNTs electrode on chloramphenicol (CAP) simulated wastewater was investigated. At pH = 5, current density of 8 mA cm(−2), electrolyte concentration of 0.1 M sodium sulfate (Na(2)SO(4)), initial CAP concentration of 10 mg L(−1), CAP degradation efficiency exceeded 95% after 40 min. In addition, molecular probe experiments and electron paramagnetic resonance (EPR) tests revealed that the active species were mainly •OH and SO(4)(−), among which •OH played a major role. The CAP degradation intermediates were discovered using high-performance liquid chromatography-mass spectrometry (HPLC-MS), and three possible degradation mechanisms were postulated. In cycling experiments, the R-TNTs anode demonstrated good stability. The R-TNTs prepared in this paper were an anode electrocatalytic material with high catalytic activity and stability, which could provide a new approach for the preparation of electrochemical anode materials for difficult-to-degrade organic compounds. |
format | Online Article Text |
id | pubmed-10254203 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102542032023-06-10 Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast Wang, Pengqi Chu, Guangyi Gao, Guangfei Li, Fengchun Ren, Yi Ding, Yue Gu, Yawei Jiang, Wenqiang Zhang, Xuan Materials (Basel) Article The key component of electrochemical advanced oxidation technology are high-efficiency anodes, and highly efficient and simple-to-prepare materials have generated a lot of interest. In this study, novel self-supported Ti(3+)-doped titanium dioxide nanotube arrays (R-TNTs) anodes were successfully prepared by a two-step anodic oxidation and straightforward electrochemical reduction technique. The electrochemical reduction self-doping treatment produced more Ti(3+) sites with stronger absorption in the UV-vis region, a band gap reduction from 2.86 to 2.48 ev, and a significant increase in electron transport rate. The electrochemical degradation effect of R-TNTs electrode on chloramphenicol (CAP) simulated wastewater was investigated. At pH = 5, current density of 8 mA cm(−2), electrolyte concentration of 0.1 M sodium sulfate (Na(2)SO(4)), initial CAP concentration of 10 mg L(−1), CAP degradation efficiency exceeded 95% after 40 min. In addition, molecular probe experiments and electron paramagnetic resonance (EPR) tests revealed that the active species were mainly •OH and SO(4)(−), among which •OH played a major role. The CAP degradation intermediates were discovered using high-performance liquid chromatography-mass spectrometry (HPLC-MS), and three possible degradation mechanisms were postulated. In cycling experiments, the R-TNTs anode demonstrated good stability. The R-TNTs prepared in this paper were an anode electrocatalytic material with high catalytic activity and stability, which could provide a new approach for the preparation of electrochemical anode materials for difficult-to-degrade organic compounds. MDPI 2023-05-25 /pmc/articles/PMC10254203/ /pubmed/37297106 http://dx.doi.org/10.3390/ma16113971 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Pengqi Chu, Guangyi Gao, Guangfei Li, Fengchun Ren, Yi Ding, Yue Gu, Yawei Jiang, Wenqiang Zhang, Xuan Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title | Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title_full | Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title_fullStr | Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title_full_unstemmed | Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title_short | Efficient Electrochemical Oxidation of Chloramphenicol by Novel Reduced TiO(2) Nanotube Array Anodes: Kinetics, Reaction Parameters, Degradation Pathway and Biotoxicity Forecast |
title_sort | efficient electrochemical oxidation of chloramphenicol by novel reduced tio(2) nanotube array anodes: kinetics, reaction parameters, degradation pathway and biotoxicity forecast |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254203/ https://www.ncbi.nlm.nih.gov/pubmed/37297106 http://dx.doi.org/10.3390/ma16113971 |
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