Study of carbon nanotube-rich impedimetric recognition electrode for ultra-low determination of polycyclic aromatic hydrocarbons in water

Muñoz, J.; Navarro-Senent, Cristina; Crivillers, Núria; Mas‐Torrent, Marta

doi:10.1007/s00604-018-2783-9

Cited by 11 publications

(12 citation statements)

References 39 publications

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“…Naphthalene reportedly can also disrupt functions of the cell membrane and interfere with enzyme functions [12]. Owing to its hazardous characteristics the United States Environmental Protection Agency has restricted the maximum PAH level in drinking water to be 0.2 ppb [13]. However, the discharge and level of various PAHs often go undetected and PAH level as high as 1.5 ppm has also been reported by previous studies [14].…”

Section: Introductionmentioning

confidence: 94%

Optical Analysis Authenticated Electrical Impedance Based Quantification of Aqueous Naphthalene

Chattopadhyay¹,

Barman²,

Chakraborty³

et al. 2019

Br J Anal Chem

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Graphical AbstractSchematic representation of the system under investigation and variation of its electrical and optical properties with varying concentration of naphthalene.Polyaromatic hydrocarbons (PAH) are organic compounds with fused benzene rings that have toxic and mutagenic properties, and have been well documented for their detrimental effect on animal and plant health. Naphthalene, a two-ring PAH, is a common water pollutant which has been linked to the disruption of immune system as well as deformation of red blood corpuscles in human and thereby raising substantial concerns. The present study quantitatively estimates naphthalene in its aqueous solution by employing electrical impedance spectroscopy (EIS), which is simultaneously supported by UV-vis spectral analysis. Naphthalene solutions of varying concentrations (0.2-1 ppm) are prepared and subjected to EIS as well as UV-visible spectroscopy. For the EIS based studies, the data is recorded for the frequency range of 1 KHz -1 MHz and electrical parameters such as capacitance, conductance and admittance are observed to increase from 3.5 pF -7.2 pF, 2.3 µS -6.1 µS and 2.4 µS -27.3 µS, Optical Analysis Authenticated Electrical Impedance Based Quantification of Aqueous Naphthalene Article 31 respectively, with varying naphthalene concentration in its solution. On the other hand impedance values are observed to decrease with the same. Naphthalene is itself a non-polar molecule and the formation of instantaneous dipoles originating from the interaction of such molecules governs the overall dielectric nature of the solution. UV-vis spectroscopic measurements of the solutions reveal the characteristic absorbance maxima at 216 nm for all the concentrations under investigation. Absorbance values are observed to increase with the relative strength of naphthalene in the solution and such values vary in the range of 0.02 -0.16 au for the peak obtained. Thus by corroborating the electrical and the optical parameters, this study establishes a quick and handy method for detection of naphthalene in aqueous solutions and ascertains a framework for further work that can be done to formulate a naphthalene sensing device. CONCLUSIONSElectrical parameters including the impedance, admittance, capacitance and conductance of naphthalene solution of varying strength are measured by employing impedance spectroscopy in this study. Formation of instantaneous dipoles in the system is observed to govern the effective dielectric behavior of the naphthalene solution. Spontaneous formation of a dipole induces a polarity in the neighboring non-polar constituent molecules. Increment of the non-polar molecule concentration in the system augments the formation of instantaneous dipoles and hence the effective dipole moment of the system increases. Coefficient of sensitivity in terms of impedance is also calculated for the measuring system, from which a decent change in impedance is observed for a variation of naphthalene concentration of a unit ppm. Spectrophotometric analyses of the solu...

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Section: Introductionmentioning

confidence: 94%

Optical Analysis Authenticated Electrical Impedance Based Quantification of Aqueous Naphthalene

Chattopadhyay¹,

Barman²,

Chakraborty³

et al. 2019

Br J Anal Chem

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“…Among the wide range of bio-analytical applications offered by electrochemical sensing devices, [52][53][54][55] the electroanalytical determination of toxic environmental pollutants in the aqueous system has gained momentum due to its widespread requirement in several areas, such as clinical research, public health and societal welfare. [56][57][58][59] The pollution promoted by certain hazardous substances released into the environment due to either natural or artificial processes, including heavy metals, chemical toxins, phenolics and/or inorganic and organic pollutants, presents a significant risk to aquatic ecosystems and human health. Several organizations, including the European Union, have promulgated specific legislative measures to reduce and control the emission of hazardous compounds into environmental waters, where the maximum concentrations are commonly allowed in the ultra-trace range.…”

Section: Achievements In Environmental Analysismentioning

confidence: 99%

Accounts in 3D‐Printed Electrochemical Sensors: Towards Monitoring of Environmental Pollutants

Muñoz

Pumera

2020

ChemElectroChem

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Heavy metal ions, small organic molecules and inorganic pollutants are some environmentally hazardous compounds that negatively impact the ecosystem and public health, owing to their high toxicity, persistency and bioaccumulation. This makes it essential to develop rapid, simple, low‐cost and sensitive devices for in situ monitoring of these toxic contaminants. In this sense, 3D printing is an additive manufacturing technique, which is transforming the way that materials are turned into functional devices by prototyping bespoke 3D materials via layer‐by‐layer deposition. This technology can offer enormous potential to environmental devices, where electrochemical sensing platforms have been on the rise, as they offer decentralized and tailored fabrication of on‐demand, low‐cost, at‐point‐of‐use systems. Although this research is still in an early stage, this Minireview aims to point out the most widely used additive manufacturing technology and materials for 3D‐printed electrode fabrication, as well as some pivotal activation procedural steps necessary to enhance their electroanalytical capabilities. Indeed, the potential of 3D‐printed electrochemical sensors to monitor a range of important hazardous pollutants in aqueous samples is reported, visualizing the future of this technology to develop integrated low‐cost analytical electronic systems for direct environmental detection in remote areas of the globe.

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“…18,19,20 Very recently, our research group has combined a carbon nanotuberich SAM surface with impedimetric analysis for determining the sum of PAHs in water via π-stacking interactions, demonstrating promising sensing results. 21 However, the main limitation of this electronic platform is its inability to discriminate between PAH targets, fact that has been recently achieved utilizing an optical array device. 22 Herein, inspired by the synergism of the unique supramolecular π-stacking interactions between identical PAH species 23,24 with the enhanced sensitivity provided by the SAM-based impedimetric systems, we report the development of a rapid, straightforward and highly sensitive sensor focused on customizing the PAH-based recognition unit for the selective discrimination and quantification of PAH pollutants in aqueous samples.…”

Section: Introductionmentioning

confidence: 99%

Selective Discrimination of Toxic Polycyclic Aromatic Hydrocarbons in Water by Targeting π-Stacking Interactions

Muñoz

Campos-Lendinez

Crivillers

et al. 2020

ACS Appl. Mater. Interfaces

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The development of highly sensitive and selective devices for the rapid screening of polycyclic aromatic hydrocarbons (PAHs) in water is nowadays a crucial challenge owing to their alarming abundance in the environment and adverse health effects. Herein, inspired by the unique π-stacking interactions taking place between identical small aromatic molecules, a novel, generic and straightforward methodology to electrochemically determine and discriminate such pollutants is described. Such method is focused on covalently anchoring different PAHs on an Indium Tin Oxide (ITO) electrode surface by means of self-assembled monolayers (SAMs). The surface anchored PAHs act as recognition units to selectivity interact with a specific PAH target of the same nature. By tailoring the recognition platform with four different model PAH molecules (naphthalene, anthracene, pyrene and fluoranthene) and carrying out an electronic tongue approximation, the selective discrimination and quantification of the selected PAHs in aqueous samples at ultra-low concentrations was achieved impedimetrically, which was also validated using a certified reference PAH mixture.

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Study of carbon nanotube-rich impedimetric recognition electrode for ultra-low determination of polycyclic aromatic hydrocarbons in water

Cited by 11 publications

References 39 publications

Optical Analysis Authenticated Electrical Impedance Based Quantification of Aqueous Naphthalene

Optical Analysis Authenticated Electrical Impedance Based Quantification of Aqueous Naphthalene

Accounts in 3D‐Printed Electrochemical Sensors: Towards Monitoring of Environmental Pollutants

Selective Discrimination of Toxic Polycyclic Aromatic Hydrocarbons in Water by Targeting π-Stacking Interactions

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