Electrochemical Determination of Chromium(VI) in River Water with Gold Nanoparticles-Graphene Nanocomposites Modified Electrodes

Sari, Trisna Kumala; Takahashi, Fumiki; Jin, Jiye; Zein, Rahmiana; Munaf, Edison

doi:10.2116/analsci.34.155

Cited by 48 publications

(17 citation statements)

References 29 publications

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“…Jin and group have utilized amperometry method using fabricated gold nanoparticle decoratedtitania nanotube arrays for selective determination of hexavalent chromium in a concentration of 1.5 ppb 34 . Sari and co-workers have employed gold nanoparticles-graphene nanocomposites modified electrodes and impedance spectroscopy for electrochemical sensing of hexavalent chromium 35 . A limit of detection of 100 ppb was attained using gold nanoparticle-electrodeposited indium tin oxide (ITO) electrodes by Tsai et al .…”

Section: Resultsmentioning

confidence: 99%

Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium

Bhanjana

Rana

Chaudhary

et al. 2019

Sci Rep

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In order to maintain a healthy organisation of bionetworks, both qualitative and quantitative estimation of hexavalent chromium in food and beverage samples is required based on proper quality control and assurance. Nonetheless, conventional quantitation techniques for hexavalent chromium generally suffer from certain limitations (e.g., the need for expertise, costly equipment, and a complicated procedure). This research was performed to elaborate a novel method to quantify hexavalent chromium based on an electrochemical cyclic voltammetry technique. To this end, nanochips of manganese oxide (Mn 3 O 4 : approximately 80–90 nm diameter and 10 nm thickness) were synthesized using a chemical method and characterized with spectroscopic and microscopic approaches. These nanochips were employed as proficient electrocatalytic materials in direct redox sensing of hexavalent chromium in both real samples and laboratory samples. Manganese oxide nanochips felicitated large surface area and catalytic action for direct electrochemical reduction of hexavalent chromium at electrode surface. This fabricated nanochip sensor presented a detection limit of 9.5 ppb with a linear range of 50–400 ppb (sensitivity of 25.88 µA cm −2 ppb −1 ).

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Section: Resultsmentioning

confidence: 99%

Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium

Bhanjana

Rana

Chaudhary

et al. 2019

Sci Rep

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“…Several combinations of nanomaterials have been investigated for improving the performance of the sensors [ 27 , 56 , 57 ]. The incorporation of nanocomposites as sensing material affords various advantages including, high selectivity, high surface area and fast electron-transfer rate of the electroactive species to electrode surface [ 58 , 59 , 60 , 61 , 62 ]. Moreover, those nanocomposites provide high electrical conductivity thanks to the synergistic effect which is rarely explained in the literature.…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

“…The developed sensor was employed for the detection of Cr(VI) in industrial wastewater with a satisfactory recovery of 98–103% and 0.32 µg·L −1 as the lowest concentration detected. In their work, Trisna K. SARI et al [ 60 ] developed an amperometric sensor based on the modification of glassy carbon electrode by graphene-AuNPs for Cr(VI) sensing in river water with good recovery of 101–104%. The developed sensor exhibits the highest electrocatalytic activity for the Cr(VI) reduction, also high stability, high sensitivity and low detection limit of 0.52 µg·L −1 .…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

Recent Advances in Electrochemical Monitoring of Chromium

Hilali

Mohammadi

Amine

et al. 2020

Sensors

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The extensive use of chromium by several industries conducts to the discharge of an immense quantity of its various forms in the environment which affects drastically the ecological and biological lives especially in the case of hexavalent chromium. Electrochemical sensors and biosensors are useful devices for chromium determination. In the last five years, several sensors based on the modification of electrode surface by different nanomaterials (fluorine tin oxide, titanium dioxide, carbon nanomaterials, metallic nanoparticles and nanocomposite) and biosensors with different biorecognition elements (microbial fuel cell, bacteria, enzyme, DNA) were employed for chromium monitoring. Herein, recent advances related to the use of electrochemical approaches for measurement of trivalent and hexavalent chromium from 2015 to 2020 are reported. A discussion of both chromium species detections and speciation studies is provided.

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“…Recent works have been focused on gold electrodes or on electrodes modified by gold nanoparticles (AuNPs), such as AuNPs‐indium tin oxide (ITO) , AuNPs‐modified screen‐printed electrode (SPE) , AuNPs‐modified carbon screen‐printed electrode (AuNPs‐CSPE) , AgNPs‐coated gold nanoporous film (AgNPs‐GNF) on a gold substrate , gold nanoelectrode ensemble using two AuNPs layers; the first is electroplated for binding 3‐mercaptopropyltrimethoxysilane (MPTS) while The second AuNPs layer is then self‐assembled on the surface of the MPTS, forming flower‐like gold nanoelectrodes, then functionalized by a thiol pyridinium PET/AuNPs/MPTS/AuNPs/GCE . Previous papers reported in literature did not investigate interference of chloride . In this work, we investigate the effect of the major interfering species such as chloride and Cr(III).…”

Section: Introductionmentioning

confidence: 99%

Comparison between Modified and Unmodified Carbon Paste Electrodes for Hexavalent Chromium Determination

et al. 2018

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This work consists of developing a simple electroanalytical method which allows the speciation of Cr(VI). Gold modified Carbon Paste Electrodes (CPEs) and unmodified CPEs have been tested for the determination of Cr(VI) in presence of an excess of Cr(III) by using differential pulse voltammetry (DPV), without any accumulation or pre‐concentration time. Several parameters affecting the analytical performances of the designed electrodes were investigated, including: electrodeposition technique of AuNPs onto the CPE, amount of AuNPs dropped on the electrode surface, supporting electrolyte, presence of Cr(III), presence of chloride ions and concentration of diphenylcarbazide (DPC). Under the optimal conditions, the use of unmodified CPE in an acidic medium containing DPC exhibited a high selectivity and a good detection limit of 19 μg ⋅ L−1, which is much lower than the admissible concentration fixed by the World Health Organization (50 μg ⋅ L−1). A linear range from 50 to 260 μg ⋅ L−1 was obtained with a relative standard deviation of 7.75 %. Furthermore, as opposed to the AuNPs‐modified CPE, the current response of Cr(VI) obtained at the unmodified CPE was not affected by the presence of chloride ions and trivalent chromium. Finally, the proposed method was successfully applied for the determination of Cr(VI) in real tap water samples with satisfactory results.

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Electrochemical Determination of Chromium(VI) in River Water with Gold Nanoparticles-Graphene Nanocomposites Modified Electrodes

Cited by 48 publications

References 29 publications

Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium

Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium

Recent Advances in Electrochemical Monitoring of Chromium

Comparison between Modified and Unmodified Carbon Paste Electrodes for Hexavalent Chromium Determination

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