Design of magnetically assembled electrode (MAE) with Ti/PbO2 and heterogeneous auxiliary electrodes (AEs): The functionality of AEs for efficient electrochemical oxidation

Zhang, Xinlei; Shao, Dan; Lyu, Wei; Xu, Hao; Liu, Yang; Zhang, Yuanyuan; Wang, Zekang; Liu, Pengjie; Yan, Wei; Tan, Guoqiang

doi:10.1016/j.cej.2020.125145

Cited by 23 publications

(5 citation statements)

References 32 publications

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“…where q e is the amount of adsorbed dye at the equilibrium, q e,max is the maximum monolayer coverage capacity, b T is the Temkin constant, and A T is the Temkin equilibrium binding constant. lnq e = lnK F + 1 n lnC e (8) where 1/n (dimensionless) and K F are the Freundlich constants, the heterogeneity factor, and support capacity (characteristic of each adsorbate-adsorbent pair), respectively.…”

Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

“…Due to their high chemical stability, the removal of dyes from water is a challenging issue [ 6 ]. Numerous methods have been proposed to remove dyes from wastewaters, such as electrochemical degradation [ 7 , 8 ], membrane-based separation [ 9 ], ultrafiltration [ 10 ], extraction [ 11 ], and biological treatment [ 12 ]. While these methods have a number of advantages, they cannot be applied on a large scale due to high costs, secondary pollution, production of waste, etc [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Delpiano¹,

Tocco²,

Medda

et al. 2021

IJMS

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Synthetic organic dyes are widely used in various industrial sectors but are also among the most harmful water pollutants. In the last decade, significant efforts have been made to develop improved materials for the removal of dyes from water, in particular, on nanostructured adsorbent materials. Metal organic frameworks (MOFs) are an attractive class of hybrid nanostructured materials with an extremely wide range of applications including adsorption. In the present work, an iron-based Fe-BTC MOF, prepared according to a rapid, aqueous-based procedure, was used as an adsorbent for the removal of alizarin red S (ARS) and malachite green (MG) dyes from water. The synthesized material was characterized in detail, while the adsorption of the dyes was monitored by UV-Vis spectroscopy. An optimal adsorption pH of 4, likely due to the establishment of favorable interactions between dyes and Fe-BTC, was found. At this pH and at a temperature of 298 K, adsorption equilibrium was reached in less than 30 min following a pseudo-second order kinetics, with k″ of 4.29 × 10−3 and 3.98 × 10−2 g∙mg−1 min−1 for ARS and MG, respectively. The adsorption isotherm followed the Langmuir model with maximal adsorption capacities of 80 mg∙g−1 (ARS) and 177 mg∙g−1 (MG), and KL of 9.30·103 L∙mg−1 (ARS) and 51.56·103 L∙mg−1 (MG).

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Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Delpiano¹,

Tocco²,

Medda

et al. 2021

IJMS

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“…The fabrication of Ti/SbÀ SnO 2 /PbO 2 anode based on published studies [33] with some modification. The titanium sheet was first sanded and then soaked in boiling 1 mol L À 1 NaOH solution for 10 minutes to remove grease.…”

Section: Fabrication Of Ti/sbà Sno 2 /Pbo 2 Composite Electrodementioning

confidence: 99%

Mechanism Studies in Electrochemical Depolymerization Processes of Alkali and Organosolv Lignin

Liu,

Zeng,

Guo

et al. 2024

ChemistrySelect

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To better understand the process and mechanism of lignin structural changes and relative product formation during PbO2 anode electrolysis, a Ti/Sb−SnO2/PbO2 composite electrode has been prepared and utilized for the alkaline electrolytic oxidation of both alkali lignin (AL) and bagasse organosolv lignin (OL). By combining electrochemical measurements, in‐situ FTIR, 2D‐HSQC NMR, and product distribution analysis, we not only investigate the impact of influence factors on the process of lignin depolymerization, but also reveal the depolymerization mechanism from the whole process of lignin structural changes in details. Under certain electrolysis conditions, the highest vanillin yield, 10.1 mg g−1, has been obtained through the electrolysis of alkali lignin, whereas the highest syringaldehyde yield of 4.0 mg g−1 has been achieved during the electrolysis of organic solvent lignin. In particular, AL mainly performs depolymerization through the selective cleavage C−C bonds to produce a series of G unit monomer products of vanillin, acetovanillone, and vanillic acid. By contrast, the depolymerization of OL shows significant selectivity in H units. Particularly, the production of the major H unit monomer product of 4‐vinylphenol has been confirmed by IR spectroelectrochemical studies from the oxidation and decarboxylation of p‐coumaric acid unit.

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“…Titanium-based metal oxide electrode uses a titanium sheet as the substrate and is covered with one or more metal oxide coatings, also known as a dimension stable anode (DSA). Common metal oxide coatings on DSA electrodes mainly include Sb-SnO 2 [24][25][26][27], IrO 2 [28], RuO 2 [29], and PbO 2 [30][31][32][33][34]. At present, there are many investigations on the doping modification methods of the Ti/PbO 2 electrode, mainly including the doping ion [35][36][37], introducing the intermediate layer [38], doping nanoparticles [39,40] and regulating the micro-morphology of electrode materials [41,42].…”

Section: Anodementioning

confidence: 99%

Progress in Preparation and Application of Titanium Sub-Oxides Electrode in Electrocatalytic Degradation for Wastewater Treatment

Guo

et al. 2022

Catalysts

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To achieve low-carbon and sustainable development it is imperative to explore water treatment technologies in a carbon-neutral model. Because of its advantages of high efficiency, low consumption, and no secondary pollution, electrocatalytic oxidation technology has attracted increasing attention in tackling the challenges of organic wastewater treatment. The performance of an electrocatalytic oxidation system depends mainly on the properties of electrodes materials. Compared with the instability of graphite electrodes, the high expenditure of noble metal electrodes and boron-doped diamond electrodes, and the hidden dangers of titanium-based metal oxide electrodes, a titanium sub-oxide material has been characterized as an ideal choice of anode material due to its unique crystal and electronic structure, including high conductivity, decent catalytic activity, intense physical and chemical stability, corrosion resistance, low cost, and long service life, etc. This paper systematically reviews the electrode preparation technology of Magnéli phase titanium sub-oxide and its research progress in the electrochemical advanced oxidation treatment of organic wastewater in recent years, with technical difficulties highlighted. Future research directions are further proposed in process optimization, material modification, and application expansion. It is worth noting that Magnéli phase titanium sub-oxides have played very important roles in organic degradation. There is no doubt that titanium sub-oxides will become indispensable materials in the future.

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Design of magnetically assembled electrode (MAE) with Ti/PbO2 and heterogeneous auxiliary electrodes (AEs): The functionality of AEs for efficient electrochemical oxidation

Cited by 23 publications

References 32 publications

Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Mechanism Studies in Electrochemical Depolymerization Processes of Alkali and Organosolv Lignin

Progress in Preparation and Application of Titanium Sub-Oxides Electrode in Electrocatalytic Degradation for Wastewater Treatment

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