Electrochemical removal of RRX-3B in residual dyeing liquid with typical engineered carbonaceous cathodes

Lü, Jun; Ayele, Befkadu Abayneh; Liu, Xiaochen; Chen, Quanyuan

doi:10.1016/j.jenvman.2020.111669

Cited by 17 publications

(11 citation statements)

References 52 publications

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“…Graphite-N, which has a favorable catalytic activity under neutral and alkaline conditions, [70] is regarded as the catalytic active site for 2-electron ORR. [71] Sharifi [40] constructed two kinds of doped graphite nitrogen atoms, N-Q center and N-Q valley , by heat annealing the nitrogen-rich carbon nanotubes. XPS and electrochemical measurements indicated that the seasonal nitrogen and pyridine sites at the edge of the graphene plane supported the four-electron pathway of the ORR process, while the N-Q center site conducted the two-electron pathway through the H 2 O 2 intermediate.…”

Section: Graphite-nmentioning

confidence: 99%

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

Ding

Zhou

Gao

et al. 2021

Adv Materials Inter

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promising and environmentally friendly oxidant in advanced oxidation processes (AOPs). Besides, hydrogen peroxide received great attention in fuel cell as well, in which hydrogen still plays an important role. But the low volumetric energy density makes the storage of hydrogen a difficult issue. H 2 O 2 possesses a high energy density and oxidation potential [13] in full pH range (E 0 = 1.763 V at pH = 0, E 0 = 0.878 V at pH 14), [1] which enables it an ideal energy carrier alternative. [11] With a compounded increase of 6%, [14] the annual production of H 2 O 2 had reached 5.5 million tons in 2015. [1] At present, three main categories were conducted to produce H 2 O 2 : direct H 2 O 2 synthesis from H 2 and O 2 , [15] anthraquinone oxidation process (AO-process), [12] and oxygen electroreduction. [16][17] More than 95% of H 2 O 2 were synthesized by AO-process, involving hydrogenation and oxidation of the anthraquinone molecule over Ni or Pd catalysts in organic solvents. [14] However, AO-process is facing some challenges: 1) Low sustainability. The combustible and explosive substances used in AO-process, such as heavy aromatics, trioctyl phosphate, are not environmentally friendly, which brings a negative influence on the sustainability of the AO-process; 2) Transportation insecurity. The high concentration of H 2 O 2 has the potential to explode when flammable materials exist, which brings safety problems to transportation; 3) Exorbitant additional cost. Ahead of being transported, H 2 O 2 has to be concentrated up to 70 wt% with impurity separation [18] and requires acid promoter stabilizer, [14] causing the increase of extra cost. All these make AO-process not the best choice for low cost and distributed H 2 O 2 production.Comparatively, two-electron oxygen reduction reaction (ORR) provides an economic, efficient, and nonhazardous alternative process, achieving the in situ H 2 O 2 production under mild conditions. [1] Furthermore, ORR process could be coupled with renewable energy sources [18] and fuel cell, [19] recovering the energy released ( f 0 ∆G , 120 KJ mol −1 ). [20,21] For instance, solar energy can be directly used as an energy source to produce H 2 O 2 through photoelectric catalysis. [22] In brief, H 2 O 2 production via two-electron oxygen electro-reduction has emerged as a promising candidate to address the demand for distributed energy.Hydrogen peroxide (H 2 O 2 ) is one of the 100 most paramount chemicals in the world, which has been widely used in industrial synthesis, pulp and bleaching, semiconductor cleaning, medical sterilizing, environmental treatments, and energy storage. Among various H 2 O 2 production methods, anthraquinone process has intrinsic drawbacks such as energy-intensive and environmental pollution while 2-electron oxygen reduction reaction (ORR) provides an economic, efficient, and nonhazardous alternative process to realize the in situ production of H 2 O 2 instead. Recently, heteroatom-doped carbon electrocatalysts, especially the nitrogen-doped ones, receive special a...

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Section: Graphite-nmentioning

confidence: 99%

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

Ding

Zhou

Gao

et al. 2021

Adv Materials Inter

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“…3c). 51 The intensity of C–C decreased after modification, suggesting that there was a growth in the carbon-bearing groups. The binding energy of C–O/C–OH slightly decreased to 285.38 eV, implying the emergence of hydroxyl not ether on the electrode.…”

Section: Resultsmentioning

confidence: 99%

“…The spectrum was deconvoluted into three peaks associated with –COOH (57 at% at 531.82 eV), OC–O (32 at% at 533.64 eV) and O–F (11 at% at 535.84 eV) after modification. 51 The oxygen-containing functional groups (CO, –COO– and C–OH) on the CNTs could specifically combine with ˙OOH and reduce O 2 to H 2 O 2 with low activation energy. 52 From the analysis of FTIR and XPS, the oxygen-containing functional groups introduced by doping with CNTs increased obviously after modification.…”

Section: Resultsmentioning

confidence: 99%

Graphitic carbon nitride and carbon nanotubes modified active carbon fiber cathode with enhanced H₂O₂ production and recycle of Fe³⁺/Fe²⁺ for electro-Fenton treatment of landfill leachate concentrate

Qin

Gao

et al. 2022

Environ. Sci.: Nano

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“…Consequently, treatment of wastewater containing these dyes is high importance. Various methods have been used for removal of dyes from wastewater, including membrane ltration 5 , adsorption 6 , ion exchange 7 , photocatalytic 8 , coagulation 9 , advanced oxidation process (AOP) 10 , electrochemical 11 , and biological methods 12 . Among them, the adsorption method has been widely applied for the dyes removal because of its simplicity, high e ciency, low cost, and reusability features 6 .…”

Section: Introductionmentioning

confidence: 99%

Removal of mixed cationic dyes by a biosorbent based on magnetic tragacanth gum hydrogel

Jaymand

2022

Preprint

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A magnetic tragacanth gum-grafted poly(acrylic acid) hydrogel (TG-g-PAA/Fe3O4) was applied for removal of malachite green (MG), basic yellow 28 (BY28), and rhodamine 6G (Rh6G) cationic dyes form industrial simulated wastewater via the well-known batch method. The most important parameters such as initial dyes concentrations, adsorbent dosage, pH, and contact time that affected adsorption performance were optimized in all single, binary, and ternary systemes. The adsorption for all dyes in all systemes were well-fitted with Langmuir model than those of the Freundlich model that revealed the linearity of the process. Maximum adsorption capacities (Qm) for MG, BY28, and Rh6G in ternary system were obtained as 626.5, 568.2, and 459.7 mgg-1, resepectively. Kinetic studies exhibited that the removal of all dyes in all systems were best-fitted with the pseudo-second-order model, which proved that the rate-limiting step might be the chemical adsorption. The hydrogel was regenerated by desorption process after loading process and reused for several times. As results, the removal efficiency of adsorbent almost remains the same for the first four cycles, and then decreased gradually.

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Electrochemical removal of RRX-3B in residual dyeing liquid with typical engineered carbonaceous cathodes

Cited by 17 publications

References 52 publications

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

Graphitic carbon nitride and carbon nanotubes modified active carbon fiber cathode with enhanced H₂O₂ production and recycle of Fe³⁺/Fe²⁺ for electro-Fenton treatment of landfill leachate concentrate

Removal of mixed cationic dyes by a biosorbent based on magnetic tragacanth gum hydrogel

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Electrochemical removal of RRX-3B in residual dyeing liquid with typical engineered carbonaceous cathodes

Cited by 17 publications

References 52 publications

H2O2 Electrogeneration from O2 Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

H2O2 Electrogeneration from O2 Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

Graphitic carbon nitride and carbon nanotubes modified active carbon fiber cathode with enhanced H2O2 production and recycle of Fe3+/Fe2+ for electro-Fenton treatment of landfill leachate concentrate

Removal of mixed cationic dyes by a biosorbent based on magnetic tragacanth gum hydrogel

Contact Info

Product

Resources

About

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

H₂O₂ Electrogeneration from O₂ Electroreduction by N‐Doped Carbon Materials: A Mini‐Review on Preparation Methods, Selectivity of N Sites, and Prospects

Graphitic carbon nitride and carbon nanotubes modified active carbon fiber cathode with enhanced H₂O₂ production and recycle of Fe³⁺/Fe²⁺ for electro-Fenton treatment of landfill leachate concentrate