Electrochemical mineralization of direct blue 71 with boron-doped diamond anodes: Factor analysis and mechanisms study

Xu, Jiaqiang; Sun, Minjia; Zhang, Chunyong; Wu, Mei-Sheng; Fu, Degang

doi:10.1016/j.jece.2021.107031

Cited by 11 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the reactive oxygen species (ROS), the hydroxyl radical ( • OH) emerges as a key intermediate for “clean oxidations” due to its high positive redox potential (2.73 V vs RHE), − its swift generation from water or oxygen, and its ability to oxidize species in aqueous solutions without leaving residues. − The generation of • OH at electrode surfaces is of particular interest due to its dynamic control and potential for incorporating renewable electrical energy for producing it in environmental and synthetic applications. A broad variety of applications including advanced oxidation processes (AOPs) for wastewater treatment, photoelectrochemical processes, and even cancer therapies have benefited from its generation at electrodes. − Prospects exist for the large-scale applications of AOPs for removing organic pollutants from rivers and tributaries through their mineralization to CO 2 . − Despite its importance and its common involvement in proposed reaction mechanisms for electrooxidations, direct evidence of electrogenerated • OH is not often presented. The pioneering work of Comninellis and others using spin-traps , demonstrated that • OH is indeed produced at electrochemical surfaces such as boron-doped diamond (BDD).…”

Section: Introductionmentioning

confidence: 99%

“… 8 − 18 Prospects exist for the large-scale applications of AOPs for removing organic pollutants from rivers and tributaries through their mineralization to CO 2 . 19 − 22 Despite its importance and its common involvement in proposed reaction mechanisms for electrooxidations, direct evidence of electrogenerated • OH is not often presented. The pioneering work of Comninellis and others using spin-traps 23 , 24 demonstrated that • OH is indeed produced at electrochemical surfaces such as boron-doped diamond (BDD).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

et al. 2022

View full text Add to dashboard Cite

The hydroxyl radical (•OH) is one of the most attractive reactive oxygen species due to its high oxidation power and its clean (photo)(electro)generation from water, leaving no residues and creating new prospects for efficient wastewater treatment and electrosynthesis. Unfortunately, in situ detection of •OH is challenging due to its short lifetime (few ns). Using lifetime-extending spin traps, such as 5,5-dimethyl-1-pyrroline N-oxide (DMPO) to generate the [DMPO–OH]• adduct in combination with electron spin resonance (ESR), allows unambiguous determination of its presence in solution. However, this method is cumbersome and lacks the necessary sensitivity and versatility to explore and quantify •OH generation dynamics at electrode surfaces in real time. Here, we identify that [DMPO–OH]• is redox-active with E 0 = 0.85 V vs Ag|AgCl and can be conveniently detected on Au and C ultramicroelectrodes. Using scanning electrochemical microscopy (SECM), a four-electrode technique capable of collecting the freshly generated [DMPO–OH]• from near the electrode surface, we detected its generation in real time from operating electrodes. We also generated images of [DMPO–OH]• production and estimated and compared its generation efficiency at various electrodes (boron-doped diamond, tin oxide, titanium foil, glassy carbon, platinum, and lead oxide). Density functional calculations, ESR measurements, and bulk calibration using the Fenton reaction helped us unambiguously identify [DMPO–OH]• as the source of redox activity. We hope these findings will encourage the rapid, inexpensive, and quantitative detection of •OH for conducting informed explorations of its role in mediated oxidation processes at electrode surfaces for energy, environmental, and synthetic applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Commonly used electrode materials mainly include carbon materials, [22,23] metals, [24,25] diamond thin films, [26,27] and metal oxides. [28][29][30][31] However, most electrodes have some shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Review on Structural Adjustment Strategies of Titanium‐Based Metal Oxide Dimensionally Stable Anodes in Electrochemical Advanced Oxidation Technology

Qiu,

Wang,

Fan

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

Emerging organic pollutants and refractory pollutants in water bodies have caused severe harm to the ecological environment and human health. Electrochemical advanced oxidation processes (EAOPs) are currently one of the most effective oxidation methods to deal with refractory organic pollutants. Electrode materials serve as the most critical component in influencing the EAOP performance. Dimensionally stable anodes (DSAs) have the advantages of dimensional stability, structural diversity, chemical stability, low oxygen evolution potential and long service life, etc. Herein, several types of Ti‐based metal oxide DSAs (Ti/MOx DSAs) commonly used in EAOPs in the past 5 years, including Ti/IrO2, Ti/RuO2, Ti/PbO2, Ti/Sb–SnO2, and Ti/TiO2, are introduced. The modification methods including metal doping, composition adjustment, nanostructure construction, introduction of intermediate layers, compositing with carbon materials, and formation of 3D structures as well as the applications of these modified Ti‐based DSAs in EAOP for the rapid degradation of various organic pollutants are summarized and their advantages and current shortcomings of electrodes are pointed out. Finally, the Ti‐based DSA's current limitations and future development prospects are concluded.

show abstract

Electrochemical oxidation of azo dyes in water: a review

et al. 2023

View full text Add to dashboard Cite

Electrochemical mineralization of direct blue 71 with boron-doped diamond anodes: Factor analysis and mechanisms study

Cited by 11 publications

References 43 publications

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Review on Structural Adjustment Strategies of Titanium‐Based Metal Oxide Dimensionally Stable Anodes in Electrochemical Advanced Oxidation Technology

Electrochemical oxidation of azo dyes in water: a review

Contact Info

Product

Resources

About