Electrochemical detection and degradation of textile dye Congo red at graphene oxide modified electrode

Shetti, Nagaraj P.; Malode, Shweta J.; Malladi, Ramesh S.; Nargund, Shachindra L.; Shukla, Shyam S.; Aminabhavi, Tejraj M.

doi:10.1016/j.microc.2019.01.033

Cited by 167 publications

(42 citation statements)

References 23 publications

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“…is makes them even more dangerous to the environment, which is why it needs to be removed from wastewaters before discharge in the aqueous system. Several wastewater treatment techniques such as ultrafiltration [2], membrane separation [3], ion exchange [4], coagulation/flocculation [5], electrochemical processes [6], adsorption [7,8], and photocatalytic degradation [9] have been used to remove and degrade the dyes from water and wastewater. e photocatalytic degradation method is based on the degradation of organic pollutants in the presence of UV and a material doped by a photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Saufi

Alouani

Alehyen

et al. 2020

International Journal of Chemical Engineering

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In this work, geopolymer synthesized with perlite and an alkaline activator medium was evaluated as a new adsorbent and photocatalyst for degradation of methylene blue (MB) dye from an aqueous medium. The functional group, the structure, and the morphology of the raw and the synthesized materials were characterized using FT-IR, XRD, and SEM analysis. The degradation of MB in the contaminated solution was examined using the spectrophotometric technique. Several analysis methods revealed the formation of the aluminosilicate gel after the geopolymerization reaction. The kinetics data with UV and without UV irradiations were well fitted with the pseudo-second-order equation. The results indicated that the degradation efficiency of cationic dye by perlite-based geopolymer without and with UV was up to 88.94% and 97.87% in 4 hours, respectively. The degradation efficiencies of methylene blue are in the following order: perlite-based geopolymer under UV irradiations is greater than perlite-based geopolymer without UV irradiations that is larger than UV irradiations. The overall experimental results suggested that the new elaborated material with synergetic adsorption and photocatalytic activities has a great potential for the treatment of water contaminated by hazardous substances.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Saufi

Alouani

Alehyen

et al. 2020

International Journal of Chemical Engineering

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“…In addition, excess use of chemicals requires high cost and results in secondary pollution 31,32 . Besides its еnvironmental compatibility, the electrochemical process presents important advantages related to its versatility, high energy efficiency, amenability of automation and safety because it operates at mild conditions [33][34][35][36][37][38][39][40][41][42][43][44][45] . The objective of this study was to investigate the еfficiency of decolorization of the widely used textile azo dye with the еlectrochemical oxidation.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical oxidation of textile azo dye reactive orange 16 on the Platinum electrode

et al. 2020

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This study focused mainly on the color removal of textile azo dye Reactive Orange 16 (RO16) by electrochemical oxidation. The effect of supporting electrolyte (H2SO4 and NaOH), RO16 concentration (from 0.5 to 10 mM) and potential scan rate (between 20 and 500 mV/s) was performed with cyclic voltammetry using platinum (Pt) wire as working electrode. The anodic peak current density was linear to RO16 concentrations. This allows the lowest concentrations to be determined voltammetrically in the two electrolytic media, acid (H2SO4 1 M) and alkaline (NaOH 0.1 M). Linearity between the current density and the square root of the potential scan rate was observed in both electrolytes. This means that the electrochemical reaction at the electrode-electrolyte interface is controlled by the diffusion process. The slope of the logarithm of peak current density versus the logarithm of potential scan rate was found to be 0.43 for RO16 in H2SO4 and 0.48 in NaOH these values of slop are close to the thеoretical value of 0.5 which confirms the diffusion process. The removal efficiency of the dye in acid electrolyte reached 40%, while it is 18% in the basic media after 4 hours of electrolysis by chronoamperometry.

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“…As such, with the emergence of concern in monitoring the thyroid active RS molecule, the objective of our work was to engineer the construction of an electrochemical sensor to detect and estimate RS which is prominent for early diagnoses of human beings and monitoring its level in the environment. In comparison to other sophisticated analytical techniques, electrochemical determinations are more promising due to its attributes such as low cost, portability, versatility, free from pretreatment procedures, small volume of analyte and simplicity of instrumentation with ease of automation . Moreover, since RS is electrochemically active; it is hence possible to detect using voltammetric technique.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Study and Rapid Quantification of Resorcinol in Hair Dye and Biological Samples Using Ultrasensitive Maghemite/MWCNT Modified Carbon Paste Electrode

Manasa¹,

Bhakta

Mekhalif

et al. 2019

Electroanalysis

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Increased concern over the risk resorcinol (RS) pose to ecology and humans, led to its position in European Union Category 1 list of endocrine disruptors. Legal measures restricted RS utilization and hence crucial to monitor its levels in the environment. Herein we report development of highly efficient and economically viable electrochemical sensor for quantitative determination of RS based on 77Maghemite/MultiWall Carbon Nanotube (M/MWCNT) modified carbon paste electrode. M/MWCNT was synthesized via strategic IR irradiation for the first time, a promising approach to overcome other complicated chemical routes. Powder X‐ray diffraction (PXRD), Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM) and Energy dispersive X‐ray (EDX) were used for characterization. Using Differential Pulse Voltammetry (DPV), we report the lowest detection limit at 0.02 μM. The potential application of the sensor was accomplished as a result of excellent recoveries made from real samples fortified with RS. Results indicated the proficiency of the sensor reliable for rapid, onsite monitoring of RS water contamination and in biological matrices.

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Electrochemical detection and degradation of textile dye Congo red at graphene oxide modified electrode

Cited by 167 publications

References 23 publications

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Electrochemical oxidation of textile azo dye reactive orange 16 on the Platinum electrode

Voltammetric Study and Rapid Quantification of Resorcinol in Hair Dye and Biological Samples Using Ultrasensitive Maghemite/MWCNT Modified Carbon Paste Electrode

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