Boron carbide boosted Fenton-like oxidation: A novel Fe(III)/Fe(II) circulation

Zhou, Peng; Cheng, Feng; Nie, Gang; Yang, Yangyang; Hu, Kunsheng; Duan, Xiaoguang; Zhang, Yongli; Wang, Shaobin

doi:10.1016/j.gee.2020.09.007

Cited by 36 publications

(14 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…reaction, as one of the most extensively studied advanced oxidation processes, has emerged as an attractive choice for eliminating contaminants, driven by the ROS in the Fe-mediated homogeneous and heterogeneous systems. , However, the sluggish kinetics of Fe(III) and regeneration of Fe(II) in the conventional P.F. reaction system (Figure S1) require a high dose of Fe(II) to maintain the reaction efficiency and narrow pH range to avert any precipitation of inactive iron oxyhydroxides . Taking oxalates as chelating agents for Fe(III), here we chose a modified P.F.…”

Section: Resultsmentioning

confidence: 99%

“…reaction system (Figure S1) require a high dose of Fe(II) to maintain the reaction efficiency and narrow pH range to avert any precipitation of inactive iron oxyhydroxides. 28 Taking oxalates as chelating agents for Fe(III), 27 here we chose a modified P.F. process to remove Al layers for the fabrication of Ff-Ti 3 C 2 MXene, as schematically illustrated in Figure 1b,c (see details in Experimental Section).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fluorine-Free Fabrication of MXene via Photo-Fenton Approach for Advanced Lithium–Sulfur Batteries

Liang

Niu

et al. 2022

ACS Nano

View full text Add to dashboard Cite

The mainstream synthesis method for MXene is using aqueous fluorine-containing acidic solutions to eliminate the A-element layers from their MAX phases. However, this strategy is environmentally hazardous and impairs the material performance (e.g., supercapacitor and Li−S batteries) owing to the presence of −F terminations. Herein, we exploit a lowtemperature "soft chemistry" approach based on photo-Fenton (P.F.) reaction for the fabrication of F-free Ti 3 C 2 (Ff-Ti 3 C 2 ) with high purity of 95%. It is confirmed that the continuous generation of highly reactive oxygen species (HO • and O 2•− radicals) during the P.F. reaction weakens the metallic Ti−Al bonds in the MAX phase and promotes the formation of high concentration OH − anions, which are conducive to the sequential topochemical deintercalation of Al layers. Moreover, the strengthened charge accumulation on the Ff-Ti 3 C 2 surface creates rich electron "reservoirs" for actuating the Li−S chemistry, which not only strengthens the host−guest interactions but also propels the kinetics of the polysulfide conversion. Taking advantage of the superior mechanical robustness, better electrolyte wettability, and improved electrocatalytic activity, the resultant Ff-Ti 3 C 2 can be used as an ideal sulfur host and Li−S chemistry mediator for advanced flexible Li−S batteries.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fluorine-Free Fabrication of MXene via Photo-Fenton Approach for Advanced Lithium–Sulfur Batteries

Liang

Niu

et al. 2022

ACS Nano

View full text Add to dashboard Cite

show abstract

“…The interfacial reactions and mechanism of Fe(III) reduction in the N/C-mediated Fe(III)/H 2 O 2 system were evaluated via various electrochemical measurements. Cyclic voltammetry (CV) is widely used to evaluate the reversibility of an electrode reaction, which can indirectly illustrate the feasibility of the Fe(III)/Fe(II) cycle on the cocatalyst. , The CV curves of different N x /C in Fe(III) solutions showed a remarkable anodic peak and a cathodic peak during a single scan (Figures d and S27), implying the mutual conversion of Fe(III) and Fe(II) on N x /C. Whereas no redox peak appeared in the CV scans of the blank steel mesh electrode (Figure S28a).…”

Section: Resultsmentioning

confidence: 99%

“…Xing et al found that zero-valent metals (e.g . , Mo 0 ) and metal sulfides/oxides (e.g., MoS 2 , MoO 2 , and WS 2 ) exhibited excellent capacity to accelerate Fe(III)/Fe(II) cycling. − To avoid metal leaching, metal-free materials [e.g., multi-walled carbon nanotubes (MWCNTs), , crystalline boron, black-red phosphorus, and boron carbide have also been developed, in which carbonaceous materials are more environmentally friendly …”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Lignin-Based N/C Cocatalysts for Ultrafast Cyclic Fenton-Like Reactions in Water Purification via Graphitic N-Mediated Interfacial Electron Transfer

et al. 2022

View full text Add to dashboard Cite

Herein, an eco-friendly lignin-based N-doped cocatalyst (N/C) was fabricated to enhance Fenton-like oxidation capacity. The N/ C-assisted Fe(III)/H 2 O 2 system showed ultrafast pollutant oxidation activity via an accelerated Fe(III)/Fe(II) cycle, exhibiting 16.9 times better caffeine removal efficiency than equivalent quantities of the classical Fenton system. N/C cocatalysts exhibited extraordinary stability and generality in the decontamination and disinfection of complex solution matrixes. Both experimental and theoretical calculation results demonstrated that graphitic N was the active site on N/C cocatalysts, which could elevate the reactivity of Fe(III) and make the interfacial electron transfer more feasible. In the N/C-mediated Fe(III)/H 2 O 2 system, an increase in electron transfer on the surface of N/C facilitated the formation of surface-bound Fe(II), thereby activating H 2 O 2 to produce hydroxyl radicals, the main active species for contaminant degradation. Notably, practical continuous water purification could be achieved by assembling N/C into fixed-bed reactors or membrane treatment units. These findings provide novel insights into N-doped carbonaceous cocatalysts and a promising green strategy for practical water treatment.

show abstract

“…In addition, the amount of ROS can be semi-quantied by measuring the degradation reaction constants of chemical probes and the concentration of the generated byproducts. Probes such as p-chlorobenzoic acid, [243][244][245] benzoic acid, 246,247 salicylic acid, 248,249 N,N-dimethyl-p-nitrosoaniline, 250 dimethyl sulfoxide, 251,252 terephthalic acid 253,254 and 1,5-diphenylcarbohydrazide 255 can be employed for HOc detection. For example, HOc can convert the non-uorescent salicylic acid to the uorescent 2,3-dihydroxybenzoic acid.…”

Section: Analytical Approaches For Ros Identicationmentioning

confidence: 99%