Mónica Razo-Negrete, José Treviño-Reséndez, David B. Meza-Ramírez, Irma Robles, Francisco J. Rodríguez-Valadez, Josué D. García-Espinoza, Luis A. Godínez
{"title":"柔性UV-LED TiO2/石墨光阳极生产羟基自由基的析因设计方法：在光电催化去除磺胺甲恶唑中的应用","authors":"Mónica Razo-Negrete, José Treviño-Reséndez, David B. Meza-Ramírez, Irma Robles, Francisco J. Rodríguez-Valadez, Josué D. García-Espinoza, Luis A. Godínez","doi":"10.1007/s11270-025-08456-3","DOIUrl":null,"url":null,"abstract":"<div><p>The development of novel strategies to enhance the performance of conventional photo-assisted electrochemical technologies for the degradation of recalcitrant pollutants in water is of increasing interest. In this context, the use of a UV-LED strip light surface modified with TiO<sub>2</sub>/graphite as a flexible photoanode has shown promise as an efficient tool for wastewater treatment. In this study, a systematic investigation of the operating variables affecting the performance of the flexible photoanode was conducted, aiming to maximize the photo-electrocatalytic production of hydroxyl radicals (<sup>•</sup>OH). A 2<sup>3</sup> factorial design was employed to evaluate the individual and combined effects of cell potential, electrolysis time, and light intensity on photo-electrocatalytic coumarin removal, monitored by UV–Vis spectroscopy. The concentration of <sup>•</sup>OH was determined indirectly through its reaction with coumarin, measured using fluorescence spectroscopy. Given the high oxidative potential and non-specific reactivity of <sup>•</sup>OH towards organic molecules, the optimal operational conditions were subsequently applied to assess the system’s capacity to degrade sulfamethoxazole, a representative emerging contaminant, determined by high-performance liquid chromatography. 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A Factorial Design Approach for Hydroxyl Radical Production using a Flexible UV-LED TiO2/Graphite Photoanode: Application to the Photo-electrocatalytic Removal of Sulfamethoxazole
The development of novel strategies to enhance the performance of conventional photo-assisted electrochemical technologies for the degradation of recalcitrant pollutants in water is of increasing interest. In this context, the use of a UV-LED strip light surface modified with TiO2/graphite as a flexible photoanode has shown promise as an efficient tool for wastewater treatment. In this study, a systematic investigation of the operating variables affecting the performance of the flexible photoanode was conducted, aiming to maximize the photo-electrocatalytic production of hydroxyl radicals (•OH). A 23 factorial design was employed to evaluate the individual and combined effects of cell potential, electrolysis time, and light intensity on photo-electrocatalytic coumarin removal, monitored by UV–Vis spectroscopy. The concentration of •OH was determined indirectly through its reaction with coumarin, measured using fluorescence spectroscopy. Given the high oxidative potential and non-specific reactivity of •OH towards organic molecules, the optimal operational conditions were subsequently applied to assess the system’s capacity to degrade sulfamethoxazole, a representative emerging contaminant, determined by high-performance liquid chromatography. The results indicate that adaptable and scalable photo-electrocatalytic devices employing internally illuminated LED-based photo-active electrodes enhance semiconductor activation, offering an effective approach for the treatment of organic pollutants in water.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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