Gold digital versatile disc platform modified with nano-porous mercury/gold amalgam as a solid-state disposable electrochemical sensor for detection of para -nitrophenol

Afzali, Fahimeh; Zavar, Mohammad Hossein Arbab; Rounaghi, Gholam Hossein; Ashraf, Narjes

doi:10.1016/j.electacta.2016.05.125

Cited by 32 publications

(10 citation statements)

References 45 publications

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“…Moreover, in comparison with most of Ag or Au-based sensors, our Cu-based sensor also owns its advantages: a higher sensitivity and a broader linear range up to 2200 μM, with its detection limit being comparable to some Ag or Au-based sensors, e.g. Au/GCE [10], Ag-MCNT/GCE [15], Au amalgam/Au disc [9], Ag amalgam electrode [8], and Au-graphene/GCE [13]. To understand the anti-interference ability of our new Cu-based 4-NP sensor, the interference from several substances which were selected as the interfering materials in the detection of 4-NP at the Cumodified GPE [17], namely phenol, 4-aminophenol, 4-bromophenol, and 2,4-dichlorophenol was investigated.…”

Section: R-no+2e+2h + → R-nhoh (Fast) R-no 2 +2e+2h + → R-nh+h 2 O (Smentioning

confidence: 95%

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Zhang¹,

Chen²,

Zheng³

et al. 2020

JNMES

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4-Nitrophenol (4-NP) is widely used as raw material or intermediate to produce pharmaceuticals, pesticides, and dyes. The extensive use of 4-NP, however, has resulted in an increasing discharge of 4-NPbearing wastewater and aroused an environmental concern due to its high resistance to biological degradation and strong toxic effect on humans, animals, and plants[1-4]. 4-NP can, for example, irreversibly damage the liver and kidneys of humans and animals [4]. In view of its water-soluble nature and strong toxicity even at low concentrations, monitoring the concentration of 4-NP in water is of great importance. The concentration of 4-NP can be determined by a number of analytical methods, such as spectroscopy [5], chromatography [6], fluorescence [7], and electrochemical techniques [8-10]. The electrochemical approach based on the reduction of 4-NP at the cathode has drawn great attention due its simplicity, low cost and quick response [8-17]. Since the performance of 4-NP electrochemical sensor depends on the cathode used, the choice of a suitable electrode material is of great importance. Noble metals, e.g. Au and Ag, are commonly used as the electrocatalysts for sensing 4-NP because of their excellent electrocatalytic activity for reduction of 4-NP [9-12], and various Au or Agbased composites have recently been developed for detection of 4-NP, including Au-graphene [13], Au-reduced graphene oxide (RGO) [14], Ag-multilayer carbon nanotube (MCNT) [15], and Ag-RGO [16]. On the contrary, despite that Cu has been found to be a good catalyst for reduction of 4-NP in the presence of NaBH 4 [18], this non-noble metal was seldom used as the 4-NP electrochemical sensor in the past probably due to the fact that the performance of the reported Cu-based 4-NP sensors, e.g. porous Cu-modified graphite pencil electrode (GPE) [17],

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Section: R-no+2e+2h + → R-nhoh (Fast) R-no 2 +2e+2h + → R-nh+h 2 O (Smentioning

confidence: 95%

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Zhang¹,

Chen²,

Zheng³

et al. 2020

JNMES

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“…Clenbuterol (CLB) and 4-nitrophenol (4-NP) have been known as toxic chemical residues in humans. If CLB is found in large doses in animal husbandry productions and human medicine, , 4-NP presents in pesticides, dyes, plasticizers, and even pharmaceuticals. , According to the World Health Organization (WHO) and the U.S. Environmental Protection Agency (U.S. EPA), the use of both of these two chemicals has been banned or limited in most countries. − However, driven by economic interests, illegal abuse of CLB and 4-NPs has not been stopped yet. So far, in an effort to combat such misuse, several fast and simple analytical techniques for precise monitoring of CLB and 4-NP have been developed. ,,, Among them, electrochemical sensors have attracted growing attention because of their high specificity and sensitivity, better stability, rapid response, low price, and high portability.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Influence of Analyte Molecular Structure Targeted on MoS₂-GO-Coated Electrochemical Nanosensors

et al. 2021

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MoS 2 -GO composites were fabricated by an ultrasonication method at room temperature. Raman spectra, emission scanning electron microscopy (SEM), and transmission electron microscopy (TEM) images were used to study the structural characteristics, morphologies, and sizes of the synthesized materials. An MoS 2 -GO/SPE (screen-printed electrode) was prepared by a facile dropping method and acted as an effective electrochemical sensor toward clenbuterol (CLB) and 4-nitrophenol (4-NP) detection. Based on the obtained results, the influence of analyte molecular structure on the adsorption ability and electronic interoperability between the targeted analyte and electrode surface were investigated in detail and discussed as well, through some electrochemical kinetic parameters (electron/proton-transfer number, electron transfer rate constant (k s ), charge transfer coefficient, and adsorption capacity (Γ)). In particular, it should be stressed that 4-NP molecules possess a simple molecular structure with many positive effects (electronic, conjugation, and small steric effects) and flexible functional groups, resulting in fast electron transport/charge diffusion and effective adsorption process as well as strong interactions with the electrode surface. Therefore, 4-NP molecules have been facilitated better in electrochemical reactions at the electrode surface and electrode−electrolyte interfaces, leading to improved current response and electrochemical sensing performance, compared with those of CLB.

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“…To overcome the limitations, attention has been paid to their ability to achieve high sensitivity and selectivity by electrochemical methods. Today, electrochemical sensors have become an essential category of chemical sensors, which have many advantages, including suitable field‐based size, absolute discrimination ability, and fast response (Afzali et al, 2016; Hatami et al, 2019; Housaindokht et al, 2018; Nasiri et al, 2021; Zahid et al, 2017). They have received much consideration, both in fundamental research and practical applications, because of their several benefits such as easy construction, reasonable cost, outstanding detection limits with sufficiency to the complicated biofluids (Eivazzadeh‐Keihan et al, 2018; Zhang, Cai, et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Recent advances in applications of surfactant‐based voltammetric sensors

Housaindokht

Janati-Fard

Ashraf

2021

J Surfact & Detergents

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Voltammetric sensors are simple, powerful, and cheap equipment with easy principles, which have been widely used in electrochemical studies to investigate the properties of the electroactive species. Surfactants are frequently used in the construction of voltammetric sensors to enhance the sensitivity and selectivity of the sensor, which significantly impacted the electrode function in terms of dissolving organic compounds, creating a specific orientation of molecules on the surface of the electrodes, and enhancing electron transfer reactions. This review focuses on the recent contributions of surfactants in the development of efficient voltammetric sensors. In addition, other ingredients commonly employed alongside surfactants, such as nanomaterials, conducting polymers, and composite materials, have been discussed. The comprehension of these aspects can guide the expansion and the use of surfactants in the electrochemical sensing scope.

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Gold digital versatile disc platform modified with nano-porous mercury/gold amalgam as a solid-state disposable electrochemical sensor for detection of para -nitrophenol

Cited by 32 publications

References 45 publications

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Insight into the Influence of Analyte Molecular Structure Targeted on MoS₂-GO-Coated Electrochemical Nanosensors

Recent advances in applications of surfactant‐based voltammetric sensors

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Gold digital versatile disc platform modified with nano-porous mercury/gold amalgam as a solid-state disposable electrochemical sensor for detection of para -nitrophenol

Cited by 32 publications

References 45 publications

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Electrocatalytic Reduction and Detection of 4-Nitrophenol in Water at Free-Standing Cu Nanowire Electrode

Insight into the Influence of Analyte Molecular Structure Targeted on MoS2-GO-Coated Electrochemical Nanosensors

Recent advances in applications of surfactant‐based voltammetric sensors

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Insight into the Influence of Analyte Molecular Structure Targeted on MoS₂-GO-Coated Electrochemical Nanosensors