Activated Carbon Fiber Electrode Research Articles

O-Modified Activated Carbon Fiber Electrode Efficiently Adsorption of Cu (II) in Wastewater

At present, wastewater discharged from many industries contains a large amount of Cu (II). In this study, an O-modified activated carbon fiber (O-ACF) with high adsorption activity was prepared by oxidation modification of activated carbon fiber with 20% nitric acid. O-ACF was used to adsorb Cu (II) in water. Electrode adsorption experiments showed that O-ACF had excellent electro-adsorption performance for Cu (II), and the maximum adsorption capacity was 48.60 mg/g, which was 1.63 times that of commercial activated carbon. After optimizing and adjusting the voltage (0.6–1.2 V), pH (2–10) and electrode plate spacing (5–20 mm), it was found that the most favorable working conditions for electro-adsorption of Cu (II) by O-ACF electrode were voltage of 1.0 V, solution pH of about 6, and electrode plate spacing of 10 mm. The kinetic model fitting showed that the adsorption effect of O-ACF on Cu (II) was mainly chemical adsorption. The intraparticle diffusion model further found that the adsorption of Cu (II) by O-ACF was influenced by membrane diffusion and internal diffusion. Adsorption regeneration experiment showed that O-ACF still maintained 95% adsorption performance for Cu (II) after 5 times of adsorption regeneration, which had good practicability. This study provides an excellent material for capacitive deionization system, which is expected to be applied in sewage treatment, seawater desalination and nutrient recovery.

A novel embedded all-solid-state composite structural supercapacitor based on activated carbon fiber electrode and carbon fiber reinforced polymer matrix

Composite structural supercapacitors (CSSs), that provide both mechanical and electrochemical properties, have great potential for applications in electric vehicles, unmanned aerial vehicles and portable electronic devices with reduced overall system weight and volume. In this paper, a novel composite structural supercapacitor device is designed and fabricated, mainly consisting of energy storage units (flexible devices) and a structural unit (carbon fiber reinforced polymer, CFRP). KOH activated carbon cloth (ACC) and PVA-KOH gel electrolyte are selected as the electrode and electrolyte of the energy storage units, respectively. The specific capacitance, energy density and power density of 1:1 ACC-CSS reach 88 mF⋅g−1, 9.9 mWh⋅kg−1 and 445.5 mW⋅kg−1, respectively. Meanwhile, the flexural strength, flexural modulus and shear strength of 1:1 ACC-CSS achieve 230 MPa, 21 GPa and 8.75 MPa, respectively. In addition, the excellent stability of electrochemical performance of 1:1 ACC-CSS under various external loads is verified by electrochemical three-point bending, electrochemical tensile and electrochemical tensile fatigue tests as well. Experimental results show that even after mechanical failure, 1:1 ACC-CSS can still maintain its electrochemical performance. The combination of good electrochemical and mechanical properties of 1:1 ACC-CSS makes it a promising and competitive candidate for the development of composite structural energy storage devices.

Binder-free La(OH)3 supported activated carbon fiber electrode with N-doped C layer for efficient phosphate electrosorption

Binder-free La(OH)3 supported activated carbon fiber (ACF) electrode with modification of N-doped C layer (named LNA) was developed for phosphate (P) electrosorption. The optimum electrosorption of P on LNA was achieved at pH = 4 and voltage = 4 V. The electrosorption capacity was 6.5 times that without voltage, and adsorption rate also increased by 9 times. The presence of 0.1 mol/L inorganic anions improved the electrosorption efficiency in the order of Cl->NO3–>SO42->HCO3–>CO32–. The regeneration study revealed that LNA still exhibited a high electrosorption capacity (29.91 mg/g) after 5 cycles. The mechanism of phosphate electrosorption of LNA was analyzed by kinetics, isotherms, FTIR and XPS, etc. The adsorption kinetics followed the pseudo-second-order model, and the adsorption equilibrium data were well described by the Langmuir isotherm. The Langmuir maximum electrosorption capacity of LNA was 70.66 mg/g. The electrosorption of phosphate was controlled by ion exchange, electrostatic attraction and the formation of surface complexes. N-doped C layer affected the local electronic structure of La and strengthened the interaction with lanthanum hydroxide, promoting the electrosorption of phosphate. The results demonstrated that LNA is a promising electrosorption material for efficient phosphate recovery.

Enhanced electrochemical and capacitive deionization performances of single-layer graphene oxide/nitrogen-doped porous carbon/activated carbon fiber composite electrodes

Capacitive deionization (CDI) is an electrosorption desalination technology based on electrode charge surface, where CDI electrode materials play important roles in efficient desalination processes. This study created and manufactured innovative single-layer graphene oxide (SGO), nitrogen-doped porous carbon (NPC), and activated carbon fiber (ACF) composites to produce SGO/NPC/ACF electrode materials with electrochemical and CDI performances. The SGO/NPC/ACF electrode combined the stability of NPC with the high conductivity of SGO to yield enhanced electrochemical and CDI activities. The samples have been characterized using XRD, SEM, and XPS. The electrochemical performance was tested by cyclic voltammetry and electrochemical impedance spectroscopy methods. As a result, SGO/NPC/ACF showed a high specific capacitance of 323.08 F g−1. The specific surface area of SGO/NPC/ACF is 1154.91 m2 g−1. The salt adsorption capacity (SAC) of the SGO/NPC/ACF composite electrode is 16.25 mg g−1, which is about 1.5 times (10.70 mg g−1) that of the ACF electrode. After fifty adsorption/desorption treatments, the SAC retention of the SGO/NPC/ACF electrode is 1.6 times higher than that of ACF. Our work also provides a theoretical basis for the efficient development of green carbon-based composites. Therefore, the SGO/NPC/ACF electrode has good cycle stability and reproducibility, which is expected to become a practical CDI electrode material for desalination.

Enhanced in-situ electrosynthesis of hydrogen peroxide on a modified active carbon fiber prepared through response surface methodology

• The preparing condition of g-C 3 N 4 /CNTs/ACF was optimized by response surface methodology. • The introduction of g-C 3 N 4 alleviated adsorption energy of oxygen and coordinated ∗ OOH binding capability. • The defects on CNTs could also reduce the oxygen adsorption energy and CNTs simultaneously increases the conductivity of the electrodes. • An appropriate amount of PTFE constructed a gas–liquid-solid three phase equilibrium, promoting the oxygen diffuse on the carbon fiber surface. • The effects of operating parameters on the production of H 2 O 2 were discussed specifically. Electrosynthesis of hydrogen peroxide (H 2 O 2 ) by two-electron oxygen reduction on the cathode is an attractive green approach for environmental remediation and chemical industries. In this study, an active carbon fiber (ACF) electrode modified with graphite carbon nitride (g-C 3 N 4 ) and carbon nanotubes (CNTs) is fabricated by a wet ultrasonic impregnation-calcination method. The doping content of g-C 3 N 4 , CNTs and polytetrafluoroethylene (PTFE) is optimized by response surface methodology (RSM). With optimum doping content, the H 2 O 2 generation by modified ACF increased several times, indicating the physicochemical and electronic transformation of ACF. The introduction of g-C 3 N 4 modulates the electronic structure of ACF, alleviating the adsorption energy of oxygen and coordinating the ∗ OOH binding capability. Besides reducing the oxygen adsorption energy, CNTs simultaneously improve the conductivity of electrodes. In addition, the addition of an appropriate amount of PTFE constructs a gas–liquid-solid three-phase equilibrium, facilitating oxygen diffusion. The effects of operating parameters on H 2 O 2 generation are also investigated and the optimal performance is achieved at current = 0.2 A, pH = 3, and aeration rate = 0.32 L/min. The modified ACF shows great potential in the practical applications for in-situ H 2 O 2 electro-generation.

Electro-peroxone enables efficient Cr removal and recovery from Cr(III) complexes and inhibits intermediate Cr(VI) generation in wastewater: Performance and mechanism

Available oxidation processes for removing Cr(III) complexes from water/wastewater usually encounter the formation of highly toxic Cr(VI) and the generation of Cr enriched waste sludge, posing challenges on the subsequent disposal. Herein, we achieve efficient removal of Cr(III)-organic complexes and simultaneous recovery of Cr from wastewater with enhanced curtailment of intermediate Cr(VI), by using an electrochemically driven peroxone (i.e., electro-peroxone) process with activated carbon fiber (ACF) electrodes. For Cr(III)-EDTA, electro-peroxone could remove ∼90% total Cr from 11.50 mg/L to 1.20 mg/L and ∼80% total organic carbon, with a strong curtailment of Cr(VI) to less than 0.2 mg/L. Additionally, the process could obtain a complete recovery of the removable Cr, of which 78.3% are enriched at ACF cathode as amorphous Cr(OH)3 deposits and the remaining 21.7% are adsorbed at the anode, thus avoiding the generation of Cr laden sludge. Mechanism studies show the electro-generated H2O2 reacts with O3 to generate abundant HO· for decomplexation, which sequentially oxidizes Cr(III) to Cr(VI), and degrades the released EDTA via stepwise decarboxylated process, as confirmed by HPLC analysis. Multiple pathways including electro-reduction, H2O2 reduction and electro-adsorption synergistically curtail and immobilize the formed intermediate Cr(VI). ACF characterizations and continuous 5-cycle experiments substantiate the excellent reusability of the ACF electrodes. Moreover, this process exhibits satisfactory effectiveness to Cr(III) complexed with other ligands (e.g., citrate and oxalate), and complexed Cr(III) in the real electroplating wastewater. We believe this study would provide an efficient and eco-friendly alternative for Cr(III) complexes removal from wastewater.

Improved oxygen reduction and simultaneous glyphosate degradation over iron phthalocyanine and reduced graphene oxide‒dispersed activated carbon fiber electrodes in a microbial fuel cell

Iron phthalocyanine (FePc) and reduced graphene oxide (rGO)‒dispersed activated carbon fiber (ACF) is used for the first time as electrodes in a microbial fuel cell (MFC) for energy generation and biodegradation of glyphosate in wastewater. The FePc-rGO/ACF is studied through various physicochemical characterization techniques. Electrochemical analysis shows a pseudocapacitive behaviour with consistent redox peaks of FePc-rGO/ACF, and a 4 e ‒ pathway for oxygen reduction reaction at the cathode. High maximum current and power densities (∼8050 mA m ˗2 and 1101 mW m ˗2 , respectively) are measured for the whole MFC, with simultaneous ∼80% degradation of glyphosate (30 mg L ˗1 ) and 79% reduction in chemical oxygen demand at the anode. The improved performance of MFC is attributed to the synergistic effects of FePc and rGO and biocompatibility of the material. The present study has successfully demonstrated the FePc-rGO/ACF electrode‒based MFC to be a green bioelectrochemical device for efficient bioelectricity generation and biodegradation of emerging herbicides in wastewater. • Successful inclusion of FePc in rGO and their effective coating over ACF. • FePc-rGO/ACF supported the formation of a dense and uniform biofilm. • 80% degradation of PMG and 79% COD reduction achieved in MFC. • The MFC based on FePc-rGO/ACF generated a high power density of 1101 mW/m 2 . • 4 e ‒ pathway indicated for ORR at the cathode of the MFC.

Dual-defects induced band edge reconstruction of tin dioxide via cobalt and nitrogen Co-Doping for wearable supercapacitor application

Dual-defects induced band edge reconstruction of tin dioxide (SnO2) via metal and non-metal ions co-doping strategy is applied to synthesize cobalt and nitrogen co-doped tin dioxide (Co, N-SnO2) on activated carbon fiber (ACF) for supercapacitor. N-doping contributes to upward shift of valence band edge through the hybridization of N-2p and O-2p and Co-doping contributes to downward shift of conduction band edge through the hybridization of Co-3d and O-2p. The bandgap is highly narrowed from 2.29 eV for SnO2 to 0.68 eV for Co, N-SnO2. The Co, N-SnO2/ACF electrode achieves specific capacitance of 361.2 F g−1 at 1 A g−1, rate capability of 61.1% from 1 to 10 A g−1 and cycling stability of 103.3% for 10,000 cycles. The density functional theory proves that Co-doping mainly promotes the capacity due to its easier deprotonation process in acid electrolyte, whereas N-doping mainly promotes the rate capability due to its narrower bandgap and thus facile electron transport. The wearable bracelet-supercapacitor based on Co, N-SnO2/ACF electrode delivers an energy density of 70.7 Wh Kg−1 under a wide potential window of 2.0 V. This finding provides a feasible route to regulate the band edge of metal oxide electrode for the promising energy storage.

Experimental study of desalination and ion selection performance using electro-sorption technology with an activated carbon fiber electrode

ABSTRACT The realization of high-efficiency desalination technologies is the key to the reuse of circulating cooling sewage in power plants. Desalination experiments were carried out on an electro-sorption device with an activated carbon fiber (ACF) plate as an electrode, using the mixed salt solution to simulate actual circulating cooling sewage. The effects of flow rate and voltage on desalination and ion selection performance were investigated in the paper. Experimental results show that different ions can be effectively removed using activated carbon fiber electrodes. Under the same adsorption conditions, the adsorption rate of ions is inversely proportional to the mass-to-charge ratio; the smaller the hydration radius of ions, the larger the ion removal rate; the ion selection performance is related to the pore size distribution of the selected electrode material. The experimental results can provide basic data and reference for the treatment of circulating cooling water using electro-sorption technology.

Dynamics and Model Research on the Electrosorption by Activated Carbon Fiber Electrodes

Electrosorption is a new emerging technology for micro-polluted water treatment. To gain a more accurate understanding of the mass and charge transfer process of electrosorption, the electrosorption performance of activated carbon fiber (ACF) electrodes with various concentrations was studied. In this paper, quasi-first-order and quasi-second-order dynamic equations, and an intra-particle diffusion equation were used to describe the electrosorption behaviors. It is believed that the electrosorption process is dominated by physical adsorption for ACF material, and the most important rate control steps in this process are intra-diffusion and electromigration steps. Based on the experimental results and modified Donnan model theory, a considerable electrosorption dynamic model which considered the influence of physical adsorption and the intra-diffusion resistance was proposed. This model quantitatively described the salt adsorption and charge storage in the ACF electrode and can fit the experimental data well.

Preparation of kraft lignin-based activated carbon fiber electrodes for electric double layer capacitors using an ionic liquid electrolyte

Abstract This article demonstrates the development of activated carbon fiber electrodes produced from hardwood kraft lignin (HKL) to fabricate electric double layer capacitors (EDLCs) with high energy and power densities using an ionic liquid (IL) electrolyte. A mixture solution of HKL, polyethylene glycol as a sacrificial polymer, and hexamethylenetetramine as a crosslinker in dimethylformamide/acetic acid (6/4) was electrospun, and the obtained fibers were easily thermostabilized, followed by carbonization and steam activation to yield activated carbon fibers (ACFs). The electrochemical performance of EDLCs assembled with the ACFs, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) as an IL electrolyte and a cellulosic separator was insufficient due to the low conductivity of the electrode. The conductivity of the electrode was improved successfully by spraying conductive carbon black (CB) onto the fibers mat during electrospinning. The CB containing electrodes with improved conductivity gave the resulting EDLCs a higher electrochemical performance, with an energy density of 91.5 Wh kg−1 and a power density of 76.2 kW kg−1.

Electrochemical reduction of bromate using noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber electrode

Bromate (BrO3−) is a disinfection by-product in drinking water and has been proven to be potentially carcinogenic to humans. Herein, electrocatalytic BrO3− reduction using a noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber (nZVI/ACF) electrode was investigated. The operating conditions including Fe content, initial solution pH, applied current intensity, and initial Br3− concentration were optimized. 94.2% of BrO3− (1.22 μM) was removed and completely transformed into bromide (Br−) within 90 min by 3.0%-nZVI/ACF at the applied current intensity 10 mA. The electrocatalytic BrO3− reduction could be achieved under a wide dissolved oxygen (DO) (0.5–7.8 mg L−1) and pH (3.0–10.0), and the decreasing DO and pH was favorable to the electrocatalytic reaction. The mechanism study demonstrated that the electrocatalytic BrO3− reduction was accomplished via the direct reduction of nZVI (31.8%), electrocatalytic reduction by nZVI (41.9%) and ACF (26.3%). nZVI/ACF electrode could maintain its high electrocatalytic activity after five successive cycles. The experimental results suggested that nZVI/ACF could achieve the fast and effective removal of BrO3− and provide a new direction to the application of nZVI.

Activation of carbon fiber for enhancing electrochemical performance

Carbon fiber sequentially undergoes thermal activation, electrochemical oxidation activation, electrochemical reduction activation and a secondary thermal activation process to form a highly activated carbon fiber electrode material.

Enhancing the yield of hydrogen peroxide and phenol degradation via a synergistic effect of photoelectrocatalysis using a g-C3N4/ACF electrode

In this work, a new activated carbon fiber (ACF) cathode modified with graphitic carbon nitride (g-C3N4) was developed, which enables the substantially improved production of H2O2 (up to 32.8 mg L−1) with relatively low energy consumption (10.9 kWh kg−1) compared to generation without g-C3N4 (4.09 mg L−1). The cathode was analyzed and characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction, and it was proved that the synthesized g-C3N4 is a thin layer sheet with a large number of carbon particles and low defect porosity. The cathode manufacturing parameters were optimized, and the influences of H2O2 production including the cathode potential, pH value, aeration rate and performance stability were studied. These features improved the production of H2O2 by about more than 7 folds when optimized ratio of g-C3N4 was used, and the modified cathode kept stable performance of H2O2 generation in 5 cycles. Further discussed by linear sweep voltammetry, rotating disk electrode and contact angle analysis, the existence of g-C3N4 were found to accelerate the electron transfer rate, is advantageous to the surface of the oxygen reaction, but will not change the two electronic number of oxygen reduction reaction activities, and this leads to enhanced performance of hydrogen peroxide production and the possible mechanism was suggested. Finally, the cathode improve by g-C3N4 proved the degradation effect of phenol by photoelectric-Fenton process. Phenol was degraded completely, and 93.8% of the organic carbon was removed, which is more than 1.5 and 5 times the amount achieved using electro-Fenton and photo-Fenton degradation only. In the degradation process of phenol, electrocatalysis and photocatalysis, they were optimized to produce substantial synergistic effect, proving the great potential practical application of organic wastewater treatment.

Experimental study on desalination using electro-sorption technology with plate-type activated carbon fiber electrode

Experimental study on desalination using electro-sorption technology with plate-type activated carbon fiber electrode

Effects of N mono- and N/P dual-doping on H2O2, [rad]OH generation, and MB electrochemical degradation efficiency of activated carbon fiber electrodes

Pure N mono- and N/P dual-doped cotton-stalk-derived activated carbon fibers (CSCFs) were synthesized by steam, HNO3(CSCF-N), NH3(CSCF-A), and (NH4)3PO4(CSCF-N/P) treatments. This study investigated how three different N/P modifiers affected the pore structure, chemical property, H2O2 generation ability, and electrocatalytic activity of methylene blue (MB) degradation of CSCFs in an electric-Fenton system. Results confirmed that the three employed treatments effectively doped N/P in the carbon lattice and slightly changed the pore structures. NH3 and (NH4)3PO4 were the most effective modifiers for the N mono-doping and N/P dual-doping of CSCFs, respectively. Among the fabricated CSCFs, the N/P dual-doped CSCF-N/P demonstrated the highest electrochemical activity in an electro-Fenton system, followed by the N mono-doped CSCF-A, the CSCF-N, and the raw CSCF. In contrast to the CSCF electrode, the CSCF-N/P electrode exhibited enhanced H2O2, OH generation, and MB degradation efficiency by 42%, 41%, and 35%, respectively. Under optimum conditions, the electrochemical decolorization efficiency of MB (initial concentration, 100 mg L−1) of the CSCF-N/P reached 93% after 150 min and was 24.1% higher than that of the CSCF. By the tenth cycle, 82.2% of the MB could still be decomposed, suggesting the excellent stability and reusability of the N/P co-doped CSCF electrode. The outstanding electrocatalytic performance of the CSCF-N/P electrode is primarily due to the simultaneous doping of active N/P sites with low activation energy and introduction of mesopores with strong trapping forces for MB. The MB reduction catalyzed by CSCF electrodes followed pseudo-first-order kinetics, and the reaction rate depended on the modifiers.

Enhancing destruction of copper (I) cyanide and subsequent recovery of Cu(I) by a novel electrochemical system combining activated carbon fiber and stainless steel cathodes

Metal recovery is an attractive strategy for treatment of heavy metal wastewater. Heavy metal cyanide complexes are common pollutants in electroplating or mine industry wastewater, which usually hinder metal recovery due to the high stability of these complexes. A novel electrochemical system with activated carbon fiber and stainless steel combined cathodes was constructed for copper (I) cyanide (Cu(CN)32−) destruction and Cu(I) recovery. The destruction of cyanide was significantly improved by combining the stainless steel and activated carbon fiber cathodes due to the enhancement of electro-generated H2O2, which was promoted due to catalysis by copper deposited at the cathodes. Both the destruction of Cu(CN)32− and recovery of Cu(I) at 75min attained 95.0±3.0%, which were higher than values obtained using stainless steel or activated carbon fiber as individual cathodes. The rate of Cu(CN)32 destruction and Cu(I) recovery increased with increasing pH. The optimal current density was 50A/m2, and higher current density caused more side reactions. Cu(CN)32− was successively transformed into Cu(CN)2−, CNO− and Cu(I), and the liberated Cu(I) was recovered as Cu(0) on the stainless steel and activated carbon fiber electrodes.

Preparation of nitrogen-doped cotton stalk microporous activated carbon fiber electrodes with different surface area from hexamethylenetetramine-modified cotton stalk for electrochemical degradation of methylene blue

Cotton-stalk activated carbon fibers (CSCFs) with controllable micropore area and nitrogen content were prepared as an efficient electrode from hexamethylenetetramine-modified cotton stalk by steam/ammonia activation. The influence of microporous area, nitrogen content, voltage and initial concentration on the electrical degradation efficiency of methylene blue (MB) was evaluated by using CSCFs as anode. Results showed that the CSCF electrodes exhibited excellent MB electrochemical degradation ability including decolorization and COD removal. Increasing micropore surface area and nitrogen content of CSCF anode leaded to a corresponding increase in MB removal. The prepared CSCF-800-15-N, which has highest N content but lowest microporous area, attained the best degradation effect with 97% MB decolorization ratio for 5mg/L MB at 12V in 4h, implying the doped nitrogen played a prominent role in improving the electrochemical degradation ability. The electrical degradation reaction was well described by first-order kinetics model. Overall, the aforesaid findings suggested that the nitrogen-doped CSCFs were potential electrode materials, and their electrical degradation abilities could be effectively enhanced by controlling the nitrogen content and micropore surface area.

An activated carbon fiber cathode for the degradation of glyphosate in aqueous solutions by the Electro-Fenton mode: Optimal operational conditions and the deposition of iron on cathode on electrode reusability

An activated carbon fiber (ACF) cathode was fabricated and used to treat glyphosate containing wastewater by the Electro-Fenton (EF) process. The results showed that glyphosate was rapidly and efficiently degraded and the BOD5/COD ratio was increased to >0.3 implying the feasibility of subsequent treatment of the treated wastewater by biological methods. The results of ion chromatography and HPLC measurements indicated that glyphosate was completely decomposed. Effective OH generation and rapid recycling/recovery of the Fe2+ ions at the cathode were responsible primarily for the high performance of the ACF-EF process. Factors such as inlet oxygen gas flow rate, Fe2+ dosage, initial glyphosate concentration, applied current intensity, and solution pH that may affect the efficiency of the ACF-EF process were further studied and the optimum operation condition was established. Results of SEM/EDX, BET and XPS analysis showed the deposition of highly dispersed fine Fe2O3 particles on the ACF surface during the EF reaction. The possibility of using the Fe2O3-ACF as iron source in the EF process was assessed. Results showed that the Fe2O3-ACF electrode was effective in degrading glyphosate in the EF process. The deposition of Fe2O3 particles on the ACF electrode had no adverse effect on the reusability of the ACF cathode.

Efficient Baeyer-Villiger electro-oxidation of ketones with molecular oxygen using an activated carbon fiber electrode in ionic liquid [bmim][OTf

A new and efficient method for the synthesis of lactones and esters involving the application of an molecular oxygen-based electro-catalytic oxidation system and ionic liquid [bmim][OTf] as electrolyte has been developed. The reaction between various ketones with molecular oxygen proceeds in a three-electrode cell under constant current conditions in [bmim][OTf] at room temperature to give the corresponding esters and lactones in good to excellent isolated yield. Additionally, the possible mechanism of Baeyer-Villiger oxidation of ketones in the electro-catalytic system is proposed. KEY WORDS : Baeyer-Villiger oxidation, Ketone, Molecular oxygen, Electrocatalysis, Ionic liquid Bull. Chem. Soc. Ethiop. 2016 , 30(2), 297-306. DOI: http://dx.doi.org/10.4314/bcse.v30i2.14