High removal efficiency of dye pollutants by electron-Fenton process using a graphene based cathode

Le, Thi Xuan Huong; Bechelany, Mikhaël; Lacour, Stella; Oturan, Nihal; Oturan, Mehmet A.; Cretin, Marc

doi:10.1016/j.carbon.2015.07.086

Cited by 249 publications

(142 citation statements)

References 51 publications

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“…It has also been widely used as a disinfectant and fungicide in aquaculture due to low cost and high effectiveness 5 . In recent years, various treatment technologies have been developed for dye removal from industrial wastewaters which are classified as chemical (ozonation 8 , chemical oxidation 9 , electrochemical 10 , photocatalytic degradation 11 ), physical (adsorption 12 , coagulation/flocculation 13 , ion exchange 14 , membrane filtration 15 ) and biological 16 treatments. The variety of synthetic dyes has been observed in effluents of some industries such as coloring, textile and tanning.…”

Section: Introductionmentioning

confidence: 99%

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

2016

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In this research, preparation of functionalized cellulosic microfibers (FCMFs) was proposed as a beneficial use of cellulosic healthcare wastes for removal of crystal violet from aqueous solutions. The functionalization process was performed using sulfonation reaction by chlorosulfonic acid. The results of scanning electron microscopy revealed a significant deformation in fibrous structure of cellulose as a result of sulfonation process. The functionalization of cellulosic fibers was confirmed by investigation of FTIR spectra of cotton and FCMFs. The charge density of FCMFs was calculated from its sulfur content which was measured by CHNS elemental analyzer. The influence of factors affecting the adsorption process such as pH, salt content, contact time, initial dye concentration and temperature were examined. The adsorption capacity was increased by increasing the salt content and temperature. The equilibrium was achieved after 60 min of mixing. The equilibrium adsorption data were well described by Freundlich, Redlich-Peterson isotherms. The maximum adsorption capacity was found to be 872 mg g -1 . The adsorption kinetic data were well fitted to pseudo-second-order and Elovich kinetic models. Thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic in nature. The residual root-mean-square error (RMSE), average absolute relative error (AARE), cross-correlation coefficient (CCC, R) and chi-square test (χ2) were used to evaluate the fitting of the adsorption isotherms and kinetic models to the experimental results. The saturated adsorbent was regenerated by acid washing (HCl, 1 mol L -1 ) and removal efficiency was decreased slightly in each batch adsorption/regeneration cycle.

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Section: Introductionmentioning

confidence: 99%

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

2016

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“…The PTFE-CB modified GF showed stronger current response for oxygen reduction reaction, which was attributed to the better electrocatalytic activity. Thus, more hydrogen peroxide could be electrogenerated at the surface of cathode [48,49]. Figure 4b showed the CV curves of the modified cathode at varied pH.…”

Section: Electrochemical Behavior Of Anodesmentioning

confidence: 99%

Efficient rhodamine B degradation using electro‐fenton process with PbO₂‐coated titanium as the anode

Tian

Yang

et al. 2018

Env Prog and Sustain Energy

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To replace the high cost Pt anode, Ti based PbO2 electrode (PbO2‐Ti) and Ti based SnO2 doped with Sb electrode (SnO2/Sb‐Ti) were fabricated and compared for treating 0.1 mM Rhodamine B (RhB) in Electro‐Fenton (EF) process. Scanning electron microscopy, energy dispersive X‐ray, X‐ray diffraction spectrometry were carried out to study the surface morphology, element composition, and substance composition of the anodes (PbO2‐Ti and SnO2/Sb‐Ti). Linear Sweep Voltammetry, cyclic voltammetry, Tafel, and electrochemical impedance spectroscopy were conducted to examine the electrochemical properties of the anodes (Pt, PbO2‐Ti, SnO2/Sb‐Ti, and Ti). These assessments showed that PbO2‐Ti had the best performance. Then, the influence of varied parameters (pH, types of anodes, current density, and electrolyte) were explored. Almost complete decolorization (99.01%) was reached at pH 3, current density 50 A/m2, 0.05 M Na2SO4 using PbO2‐Ti as the anode after 20 min electrolysis. Under these conditions, 90.48% of total organic carbon was removed after 180 min. Finally, the durability of PbO2‐Ti was evaluated via accelerated service life test and exhibited long service lifetime (∼4000 h). © 2018 American Institute of Chemical Engineers Environ Prog, 38: 189–197, 2019

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“…The main difference between GO and rGO is that GO is with higher oxygen content than rGO [54,55]. Even though the reduction of GO should supposedly remove the oxygen-containing species from the rGO surface in order to restore some unique properties of pristine graphene [15], it has been shown that some amount of oxygen still remains in the sample of rGO [24,28,38,52,56,57]. In this study, according to the XPS survey spectra of rGO (see Figure 3c), the O 1s peak of rGO have been declined compared with the XPS spectra of GO (data not shown), revealing that part of the C-O functionalities on the surface of GO have been reduced.…”

Section: Surface Characterisation Of Graphene-family Nanomaterialsmentioning

confidence: 99%

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

et al. 2016

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Abstract:The aim of this study is to compare the electrochemical behaviour of graphene-based materials of different origin, e.g., commercially available graphene nanosheets from two producers and reduced graphene oxide (rGO) towards the oxygen reduction reaction (ORR) using linear sweep voltammetry, rotating disc electrode and rotating ring-disc electrode methods. We also investigate the effect of catalyst ink preparation using two different solvents (2-propanol containing OH´ionomer or N,N-dimethylformamide) on the ORR. The graphene-based materials are characterised by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Clearly, the catalytic effect depends on the origin of graphene material and, interestingly, the electrocatalytic activity of the catalyst material for ORR is lower when using the OH´ionomer in electrode modification. The graphene electrodes fabricated with commercial graphene show better ORR performance than rGO in alkaline solution.

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High removal efficiency of dye pollutants by electron-Fenton process using a graphene based cathode

Cited by 249 publications

References 51 publications

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

Efficient rhodamine B degradation using electro‐fenton process with PbO₂‐coated titanium as the anode

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

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High removal efficiency of dye pollutants by electron-Fenton process using a graphene based cathode

Cited by 249 publications

References 51 publications

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

Efficient rhodamine B degradation using electro‐fenton process with PbO2‐coated titanium as the anode

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

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Efficient rhodamine B degradation using electro‐fenton process with PbO₂‐coated titanium as the anode