A Sensitive and Selective Nitrite Detection in Water Using Graphene/Platinum Nanocomposite

Kathiresan, Vijayaraj; Jin, Sung‐Ho; Park, Deog-Su

doi:10.1002/elan.201600133

Cited by 12 publications

(3 citation statements)

References 54 publications

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“…Pt nanoparticles also have excellent electro catalytic activity for nitrite oxidation. Vijayaraj et al proposed that Pt-electrochemical reduced graphene oxide (ERGO) nanocomposite film modified GCE for nitrite selectivity and sensitivity detection [106]. Platinum nanoparticles were electrochemically and uniformly deposited on the surface of ERGO.…”

Section: Metalmentioning

confidence: 99%

Application of Graphene-Based Materials for Detection of Nitrate and Nitrite in Water—A Review

Wang

et al. 2019

Sensors

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Nitrite and nitrate are widely found in various water environments but the potential toxicity of nitrite and nitrate poses a great threat to human health. Recently, many methods have been developed to detect nitrate and nitrite in water. One of them is to use graphene-based materials. Graphene is a two-dimensional carbon nano-material with sp 2 hybrid orbital, which has a large surface area and excellent conductivity and electron transfer ability. It is widely used for modifying electrodes for electrochemical sensors. Graphene based electrochemical sensors have the advantages of being low cost, effective and efficient for nitrite and nitrate detection. This paper reviews the application of graphene-based nanomaterials for electrochemical detection of nitrate and nitrite in water. The properties and advantages of the electrodes were modified by graphene, graphene oxide and reduced graphene oxide nanocomposite in the development of nitrite sensors are discussed in detail. Based on the review, the paper summarizes the working conditions and performance of different sensors, including working potential, pH, detection range, detection limit, sensitivity, reproducibility, repeatability and long-term stability. Furthermore, the challenges and suggestions for future research on the application of graphene-based nanocomposite electrochemical sensors for nitrite detection are also highlighted.Sensors 2020, 20, 54 2 of 35 deaths. Nitrite in drinking water can irreversibly convert hemoglobin into methemoglobin, which results in a decrease in oxygen carrying capacity in the blood [5]. It can react with secondary amines to produce n-nitrosamines, which are likely to lead to gastric cancer [6]. Since nitrate is converted into nitrite in the digestive tract, it also very harmful to the human body [7]. It can also lead to the unnatural reproduction of aquatic plants and algae, leading to "red tides" and the death of fish [8,9]. The United States (U.S.) Environmental Protection Agency has limited the nitrite and nitrate content in drinking water to 1 mg/L and 10 mg/L [10] and other countries have made similar regulations. The concentration of nitrate and nitrite in water has become one of the indexes for evaluating water quality. Therefore, the detection of nitrate and nitrite in water samples at low concentrations has been the focus of research [11].So far, many methods have been used to detect nitrate and nitrite, such as spectrophotometry [12][13][14], chemiluminescence [15,16], chromatography [17], fluorescence [18,19] and electrochemical methods [20][21][22]. Among them, the electrochemical method is one of the most commonly used detection methods because of its advantages of being low cost, fast, direct and high efficiency [23]. However, the sensitivity and accuracy of the electrodes are reduced because of disturbance by other substances. Bare electrodes need higher applied potential, which limits the application of bare electrodes [24]. Therefore, electrochemical techniques based on modified electrodes have been extensively...

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Section: Metalmentioning

confidence: 99%

Application of Graphene-Based Materials for Detection of Nitrate and Nitrite in Water—A Review

Wang

et al. 2019

Sensors

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“…Among them, the construction of nonenzymatic electrochemical sensors is promising for the detection of nitrite, because they overcome many drawbacks such as natural enzyme denaturation, complicated immobilization processes, and harsh experimental conditions . Until now, two‐dimensional carbon nanomaterials, especially graphene, are usually used to modify the electrode for construction of sensitive and selective electrochemical nitrite sensors due to its outstanding conductivity, larger specific surface area, wide potential window, good mechanical stability, and so on .…”

Section: Introductionmentioning

confidence: 99%

“…To further enhance the performance of the nonenzymatic electrochemical nitrite sensor, many researchers has recently prepared diverse nanocomposites consisting of graphene and inorganic nanomaterials . However, the introduction of most inorganic nanomaterials cannot remarkably improve the performance of the electrochemical nitrite sensor because these nanomaterials possess limited electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Nonenzymatic Amperometric Sensor for Nitrite Detection Based on a Nanocomposite Consisting of Nickel Hydroxide and Reduced Graphene Oxide

et al. 2018

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An efficient non‐noble metal eletrocatalyst, nickel hydroxide/reduced graphene oxide nanocomposite (Ni(OH)2/sr‐GO), is synthesized in the absence of reductants and alkali by a simple one‐step solvothermal method. The morphology, structure, and composition of the Ni(OH)2/sr‐GO nanocomposite is characterized by various analytical techniques like scanning electron microscopy, X‐ray diffraction, Raman spectroscopy, X‐ray photoelectron spectroscopy, and energy dispersive X‐ray spectroscopy. The Ni(OH)2/sr‐GO nanocomposite is then used to construct a nonenzymatic amperometric sensor for highly sensitive detection of nitrite. The result shows that the Ni(OH)2/sr‐GO nanocomposite possesses superior electrocatalytic ability toward nitrite. The electrochemical performance of the Ni(OH)2/sr‐GO is evaluated by electrochemical impedance spectroscopy, chronocoulometry, and cyclic voltammetry. Under the optimal conditions, the electrochemical sensor for nitrite detection exhibits a linear range from 0.1 to 663.6 μM, with a detection limit of 0.07 μM (S/N=3). In addition, the sensor provides favorable selectivity, reproducibility, and stability, and can be successfully applied for the detection of nitrite in spiked water samples. Recoveries range between 95 and 108 %.

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A Novel Cerium Tungstate Nanosheets Modified Electrode for the Effective Electrochemical Detection of Carcinogenic Nitrite Ions

Kumar¹,

Karthik

Chen

et al. 2017

Electroanalysis

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In this present scenario, for the first time, we propose a facile and simple wet chemical approach for the fabrication of two‐dimensional (2D) cerium tungstate (CeW2O9;CeW) nanosheets and evaluated as an electrochemical sensor for the detection of nitrite ions. The successful formation of CeW2O9 nanosheets was confirmed by various physicochemical techniques such as X‐ray diffraction, Fourier transform infrared spectroscopy, Raman, Scanning electron microscope, Transmission electron microscope and Energy dispersive X‐ray studies. The electrochemical properties of the CeW nanosheets were studied by using cyclic voltammograms (CV) and chronoamperometric techniques. As an electrochemical sensor, the CeW nanosheets modified glassy carbon electrode (GCE) showed superior electrocatalytic activity in the oxidation of nitrite in terms of higher anodic peak current and lower oxidation potential when compared with unmodified GCE. CeW nanosheets based electrochemical sensor has been fabricated which detect nitrite in wide linear response range, good sensitivity and very low detection limit of 0.02–986 μM, 2.85 μA μM−1 cm−2 and 8 nM, respectively. Moreover, the CeW nanosheets modified GCE exhibited excellent selectivity even in the presence of common metal ions and biologically co‐interfering compounds. For the practical viability of the prepared amperometric sensor has been utilized in various water samples such as tap, lake and drinking water and the obtained recoveries are appreciable.

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A Sensitive and Selective Nitrite Detection in Water Using Graphene/Platinum Nanocomposite

Cited by 12 publications

References 54 publications

Application of Graphene-Based Materials for Detection of Nitrate and Nitrite in Water—A Review

Application of Graphene-Based Materials for Detection of Nitrate and Nitrite in Water—A Review

Nonenzymatic Amperometric Sensor for Nitrite Detection Based on a Nanocomposite Consisting of Nickel Hydroxide and Reduced Graphene Oxide

A Novel Cerium Tungstate Nanosheets Modified Electrode for the Effective Electrochemical Detection of Carcinogenic Nitrite Ions

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