Graphene-TiO2 Nanocomposite-Modified Screen-Printed Electrode for Sensitive Nitrite Determination in Hot Spring Water

Li, Xiaobiao

doi:10.20964/2018.01.38

Cited by 7 publications

(4 citation statements)

References 47 publications

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“…When further hybridized with Gr, the nanocomposite could present larger specific surface area, higher electrocatalytic activity and superior biocompatibility. Transition metal oxide NPs/Gr nanocomposite such as Co 3 O 4 /Gr, 94,95 Fe 2 O 3 /Gr, 96,97 Fe 3 O 4 /Gr, [98][99][100] MnO x /Gr, [101][102][103] TiO 2 /Gr, [104][105][106][107] ZnO/Gr, 108 and CeO 2 /Gr 104 are extensively employed in the preparation of NO 2 − electrochemical sensors with enhanced sensitivity, owing to their unique structures, large specific surface area, high electrical conductivity, and excellent catalytic activity. Co 3 O 4 nanospindles/rGO composite (Co 3 O 4 /rGO) was synthesized by pyrolysis of a 3D coordination complex precursor, cobalt benzoate dihydrazinate, at 200°C.…”

Section: B885mentioning

confidence: 99%

“…Besides, TiO 2 /Gr nanohybrids (i.e. TiO 2 /GO, 106 Ag NPs/TiO 2 -functionalized rGO sheet nanocomposite (Ag/TiO 2 /rGO), 105 and Au NPs and rGO co-decorated TiO 2 nanotube arrays (Au/rGO/TiO 2 NTs) 107 basically met the requirements of reliable detection of nitrite. A comparative investigation between three various metal oxide NPs doped rGO nanocomposites (TiO 2 /rGO, SeO 2 /rGO, CeO 2 /rGO) was performed toward NO 2 − detection in tap water.…”

Section: B885mentioning

confidence: 99%

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Review—Recent Developments on Graphene-Based Electrochemical Sensors toward Nitrite

Xia

Tian

et al. 2019

J. Electrochem. Soc.

169

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Nitrite (NO 2 − ) has been extensively applied in agricultural and industrial products and is often found in various foodstuff, tap water, biological samples and environmental systems. However, NO 2 − as a toxic contaminant probably threaten the human health by producing highly carcinogenic N-nitrosamines. Compared with the traditional analytical techniques, electroanalytical method has considerable advantages such as cost-effective, rapidness, facile operation, and easy miniaturization. Graphene nanocomposites have significant synergistic electrocatalytic effect toward the nitrite redox, which could eventually amplify the electrochemical response signals, and improve the selectivity, sensitivity, and practicability for the nitrite detection in various real samples. The recent developments on graphene-based nitrite electrochemical sensors are reviewed from the view of sensing materials, including graphene, metal nanoparticle/graphene composites, nanostructured metal compound/graphene composites, polymer/graphene composites, MOF/graphene composites, enzyme/graphene composites, MWCNT/graphene composites, and electron mediator/graphene composites. Moreover, the sensing performances including detection ranges, limit of detection (LOD) and sensitivity are tabulated. Finally, the major drawbacks, opportunities and challenges of graphene-based nitrite electrochemical sensors are also discussed.

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Section: B885mentioning

confidence: 99%

Section: B885mentioning

confidence: 99%

Review—Recent Developments on Graphene-Based Electrochemical Sensors toward Nitrite

Xia

Tian

et al. 2019

J. Electrochem. Soc.

169

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“…The average recovery of the electrode in tap water is 99.8%. Zhao [115]. TiO 2 combined with RGO has good electro catalytic activity, which significantly improves the response current to nitrite.…”

Section: Metal Oxidementioning

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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“…Up to now, our interest has been focused on the introduction of various indicator molecules as electrode modifiers in nitrite sensing, such as polymeric films, a new polyoxometalate/rGO/ Pani [22,23], metal oxides [24], metal chalcogenides [25,26], metal alloys [27] and carbon nanomaterials [21,28,29]. Li et al proposed a nitrite sensor by using CuO/H-C 3 N 4 /rGO nanocomposite for the nitrite detection [19].…”

Section: Introductionmentioning

confidence: 99%

Construction of polythiophene-derivative films as a novel electrochemical sensor for highly sensitive detection of nitrite

Geng

et al. 2021

Anal Bioanal Chem

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Herein, a novel, convenient, and highly selective electrochemical sensor for determination of nitrite based on a polythiophenederivative film-modified glassy carbon electrode (GCE) was established. In this work, 2,5-di-thiophen-3-yl-thiazolo [5,4-d]thiazole (DTT), a novel thiophene derivative, was synthesized and used to form an original and excellent polymer film (PolyDTTF) on GCE through one-step electropolymerization for the first time. The modified electrodes were characterized by electron microscopy (SEM), Fourier transform infra-red spectroscopy (FT-IR), UV-visible spectra, Raman spectroscopy, and electrochemical technologies, in which the electrochemical sensor based on PolyDTTF was successfully constructed and demonstrated a significant electrocatalytic effect on nitrite. The influence of pH value, electrodeposition scanning times, scanning speed, and potential on the electrochemical behavior of nitrite were investigated in detail. Furthermore, the nitrite sensor exhibits excellent responses proportional to nitrite concentrations (R 2 = 0.9972) over a concentration range of 5.5 × 10 −9 ~3.5 × 10 −5 M with a detection limit (LOD) of 2 nM, and has extremely good anti-interference ability for nitrite detection. This proposed sensor can be used to detect nitrite in actual samples, opening the possibility for applications in the food industry and environmental analysis.

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Graphene-TiO2 Nanocomposite-Modified Screen-Printed Electrode for Sensitive Nitrite Determination in Hot Spring Water

Cited by 7 publications

References 47 publications

Review—Recent Developments on Graphene-Based Electrochemical Sensors toward Nitrite

Review—Recent Developments on Graphene-Based Electrochemical Sensors toward Nitrite

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

Construction of polythiophene-derivative films as a novel electrochemical sensor for highly sensitive detection of nitrite

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