Fabrication of gold nanoparticles/l-cysteine functionalized graphene oxide nanocomposites and application for nitrite detection

Pan, Fei; Chen, Dandan; Zhuang, Xuming; Wu, Xuezhong; Luan, Feng; Zhang, Shuang; Wei, Jia-Ru; Xia, Shuang; Li, Xiao

doi:10.1016/j.jallcom.2018.02.053

Cited by 40 publications

(15 citation statements)

References 34 publications

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“…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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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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“…Gold nanoparticles are widely used as electrode modifying agents that improve analytical and sensor properties of the electrode. In such a way, modification of the electrode surface with gold nanoparticles (AuNPs) can lead to better heterogeneous charge transfer ability [25]; higher conductivity [39]; larger surface area [18]; exhibition of enhanced catalytic activity [40]; and, in general, to higher sensitivity to nitrite detection. Synthesis of gold nanoparticles has a considerable impact on properties of modified electrodes.…”

Section: Electrochemical Behavior Of No 2 − On Fcve and Modified Fcvementioning

confidence: 99%

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

et al. 2020

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A film carbon veil-based electrode (FCVE) modified with non-ionic surfactant Triton X-100 (TrX100) has been developed for nitrite determination. A new simple and producible technique of hot lamination (heat sealing) has been used for the FCVE manufacturing. The paper presents the findings of investigating the FCVE and the TrX100/FCVE by using voltammetry, chronoamperometry, and scanning electron microscopy. Modification of the electrode with TrX100 improves the hydrophilic property of its surface, which results in a larger electrode active area and higher sensitivity. Optimal conditions for nitrite determination with the use of the TrX100/FCVE have been identified. The linear range (LR) and the limit of detection (LOD) are 0.1–100 μM and 0.01 μM, respectively. The relative standard deviation (RSD) does not exceed 2.3%. High selectivity of the sensor ensures its successful application for the analysis of real samples (sausage products and natural water). The obtained results accord well with the results of the standard spectrophotometric method.

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“…Under the optimum conditions, the linear range for the detection of nitrite was 0.5e50 mg/L with a detection limit of 0.12 mg/L. Pan et al developed a GCE modified by a GNPs/ L-cysteine functionalized graphene oxide (GNPs/ GO-SH) nanocomposite for the electrochemical detection of nitrite in pickled radish [70]. Because of the low stability of GO, it is essential to improve the stability of this sensor and functionalize it by chemical modification.…”

Section: Gnp-based Electrochemical Sensors For the Detection Of Nitritementioning

confidence: 99%

Gold nanoparticle-based colorimetric and electrochemical sensors for the detection of illegal food additives

Li¹,

Zhang²,

Chen³

2020

Journal of Food and Drug Analysis

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Lately, scandals associated with the illegal addition of poisonous chemicals to food for commercial interests have been gradually disclosed to the public. Problems related to food safety do not only harm public health but also affect the stability of economic and social development. Food safety has become a common issue in society, and strengthening the related regulations have become increasingly important. Although conventional techniques are accurate and sensitive in the detection of the vast majority of illegal food additives, they rely on time-consuming, labor-intensive procedures that depend on expensive instruments. Thus, efficient and rapid identification of poisonous, illegal additives in food is a crucial task in analytical chemistry. Recently, in this context, gold nanoparticles (GNPs) have attracted considerable attention because of their optical, electronic, catalytic, and chemical properties. Their excellent properties have facilitated the widespread use of GNPs in different sensors. This review covers the two most common GNP-based sensors with colorimetric and electrochemical responses, which have proven to be effective in the detection of illegal additives. The GNP-based sensors comply with the requirement of modern analysis, such as high selectivity, sensitivity, simplicity, rapidity, and portability. Thus, they have great potential as powerful sensing tools for food safety screening. This review elucidates the utility and advances of GNP-based colorimetric and electrochemical sensors for the detection of illegal additives in the food industry and in the supervision of food quality and safety. Additionally, an outlook of the trends and future development of research on these sensors is provided.

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Fabrication of gold nanoparticles/l-cysteine functionalized graphene oxide nanocomposites and application for nitrite detection

Cited by 40 publications

References 34 publications

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

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

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

Gold nanoparticle-based colorimetric and electrochemical sensors for the detection of illegal food additives

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