Dip coating deposition of manganese oxide nanoparticles on graphite by sol gel technique for the indirect electrochemical oxidation of methyl orange dye: Parameter’s optimization using box-behnken design

Doumbi, Romuald Teguia; Noumi, Guy Bertrand; Domga,

doi:10.1016/j.cscee.2020.100068

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…As the oxidation reaction proceeds, the N=N bond is cleaved completely and the MO molecule is converted to different types of nitrobenzene compounds [ 52 ]. For intermediates of benzene compounds, the benzene ring can be hydrogenated by •OH, and reactive chlorine is available to form different intermediates [ 53 ]. Finally, with the further oxidation processes of active species, chlorine-based substituents and other organic intermediates can eventually convert to CO 2 , H 2 O, and the corresponding anions (Cl − , NO 3 − , and SO 4 2− ) [ 28 , 54 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of PbO2/PVDF/CC Composite and Employment for the Removal of Methyl Orange

et al. 2023

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The in situ electrochemical oxidation process has received considerable attention for the removal of dye molecules and ammonium from textile dyeing and finishing wastewater. Nevertheless, the cost and durability of the catalytic anode have seriously limited industrial applications of this technique. In this work, the lab-based waste polyvinylidene fluoride membrane was employed to fabricate a novel lead dioxide/polyvinylidene fluoride/carbon cloth composite (PbO2/PVDF/CC) via integrated surface coating and electrodeposition processes. The influences of operating parameters (pH, Cl− concentration, current density, and initial concentration of pollutant) on the oxidation efficiency of PbO2/PVDF/CC were evaluated. Under optimal conditions, this composite achieves a 100% decolorization of methyl orange (MO), 99.48% removal of ammonium, and 94.46% conversion for ammonium-based nitrogen to N2, as well as an 82.55% removal of chemical oxygen demand (COD). At the coexistent condition of ammonium and MO, MO decolorization, ammonium, and COD removals still remain around 100%, 99.43%, and 77.33%, respectively. It can be assigned to the synergistic oxidation effect of hydroxyl radical and chloride species for MO and the chlorine oxidation action for ammonium. Based on the determination of various intermediates, MO is finally mineralized to CO2 and H2O, and ammonium is mainly converted to N2. The PbO2/PVDF/CC composite exhibits excellent stability and safety.

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Section: Resultsmentioning

confidence: 99%

Fabrication of PbO2/PVDF/CC Composite and Employment for the Removal of Methyl Orange

et al. 2023

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“…Research into new materials and advanced materials applied to environmental treatment has received and continues to receive special attention from domestic and international scientists. Many methods have been used, such as adsorption, [12][13][14] electrochemical, [15][16][17] microorganisms, [18][19][20] photocatalyst degradation, [21][22][23][24] etc., to remove methyl orange. Cu 2 O has a narrow direct band gap energy of 2.0-2.2 eV, making it a p-type semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Cu<sub>2</sub>O Nanoparticles and Their Application for the Photodegradation of Methyl Orange in Aqueous Media

Nam Ho

2024

Fine Chemical Engineering

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The existence of colorants in water has caused many disadvantages to aquatic systems and the environment. Scientists have made efforts to decompose and remove them using many different methods. In this study, Cu2O nanoparticles were synthesized with a mixture of reducing agents, including glucose and ascorbic acid, as a photocatalyst for decomposing azo dyes. The prepared nano Cu2O was fully characterized using scanning electron microscope (SEM) imaging, X-ray diffraction (XRD) diffraction measurements, and band gap energy determination. The obtained nano Cu2O was of a uniform truncated block shape with particle size ranging from 50 to 150 nm. The prepared nano Cu2O showed remarkable photocatalytic behavior toward methyl orange under visible light radiation with the removal percentage of 95.46% after 4 hours of reaction. In addition, the catalyst can be reused many times without much impact on catalytic efficiency. Photocatalytic degradation using Cu2O nanoparticles is a promising method for the removal of methyl orange, contributing to creating a safe and sustainable environment.

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“…Oxides of cobalt (Co), nickel (Ni), and manganese (Mn) elements have attracted extensive studies regarding wastewater remediation topics [Li et al, 2016;Sui et al, 2019;Jirátová et al, 2021;Jadhav et al, 2021]. They are tremendously used in single oxide route processes [Abbas and Abbas, 2019;Teguia Doumbi et al, 2021]. Nonetheless, assembling binary or ternary systems of these three compounds was rarely investigated in the related field of water treatment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mn-Co-Ni Composite Electrode by Anodic and Cathodic Electrodeposition for Indirect Electro-oxidation of Phenol – Optimization of the Removal by Response Surface Methodology

Ahmed,

Salman

2023

Ecol. Eng. Environ. Technol.

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In the present work, Response Surface Methodology (RSM) was utilized to optimize process variables and find the best circumstances for indirect electrochemical oxidation of mimicked wastewater to remove phenol contaminants using prepared ternary composite electrode. The electrodeposition process is used for the synthesis of a ternary composite electrode of Mn, Co, and Ni oxides. The selected concentrations of metal salts of these elements were 0.05, 0.1, and 1.5 M, with constant molar ratio, current density, and electrolysis time of 1:1:1, 25 mA/cm 2 , and 2 h. Interestedly, the gathered Mn-Co-Ni oxides were deposited at both the anode and cathode. X-ray diffraction (XRD) and scanning electron microscopy (SEM) facilitated the qualitative characterization of surface structure and morphology of the accumulated oxides. The energy dispersive X-ray (EDX) provided a semi-quantitative analysis of deposit composition. The atomic force microscopy (AFM) apparatus quantified t he roughness. We examined the efficiency of composite electrodes in coinciding with the removal of Chemical Oxygen Demand (COD) under current densities of 40, 60, and 80 mA/cm 2 , pH values of 3, 4, and 5, and NaCl concentrations of 1, 1.5, 2 g/l. RSM covered the optimization of process parameters in conjunction with Central Composite Design (CCD). The COD represented the response function in the optimization procedure. The optimal current density, NaCl concentration, and pH magnitude were 80 mA/cm 2 , 1.717 g/l, and 3, respectively. The efficiency of COD elimination of 99.925% attained after 1 hour of indirect electrochemical oxidation with an energy consumption of 152.380 kWh per kilogram of COD. The COD elimination model is significant based on the correlation coefficient (R 2 ) and F-values, and the experimental data fitted well to a second-order polynomial model with R 2 of 98.93%.

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Dip coating deposition of manganese oxide nanoparticles on graphite by sol gel technique for the indirect electrochemical oxidation of methyl orange dye: Parameter’s optimization using box-behnken design

Cited by 8 publications

References 17 publications

Fabrication of PbO2/PVDF/CC Composite and Employment for the Removal of Methyl Orange

Fabrication of PbO2/PVDF/CC Composite and Employment for the Removal of Methyl Orange

Green Synthesis of Cu<sub>2</sub>O Nanoparticles and Their Application for the Photodegradation of Methyl Orange in Aqueous Media

Synthesis of Mn-Co-Ni Composite Electrode by Anodic and Cathodic Electrodeposition for Indirect Electro-oxidation of Phenol – Optimization of the Removal by Response Surface Methodology

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