Selective detection of picric acid using functionalized reduced graphene oxide sensor device

Huang, Jiarui; Wang, Liyou; Shi, Chengcheng; Dai, Yijuan; Gu, Cuiping; Liu, Jinhuai

doi:10.1016/j.snb.2014.02.050

Cited by 59 publications

(20 citation statements)

References 38 publications

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“…The sensitivity observed herein is high as compared to the reported sensitivities of some recently reported results. Huang et al [ 64 ] reported a sensitivity of 0.00613 μA·μM −1 with a detection limit of 0.54 μM for picric acid through a reduced graphene oxide sensor modified with 1-pyrenebutyl-amino-β-cyclodextrin. It was proposed that β-cyclodextrin with the hydrophobic internal cavity and the hydrophilic external surface has a remarkable tendency to integrate with three hydrophobic -NO 2 groups of picric acid.…”

Section: Resultsmentioning

confidence: 99%

A Highly-Sensitive Picric Acid Chemical Sensor Based on ZnO Nanopeanuts

et al. 2017

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Herein, we report a facile synthesis, characterization, and electrochemical sensing application of ZnO nanopeanuts synthesized by a simple aqueous solution process and characterized by various techniques in order to confirm the compositional, morphological, structural, crystalline phase, and optical properties of the synthesized material. The detailed characterizations revealed that the synthesized material possesses a peanut-shaped morphology, dense growth, and a wurtzite hexagonal phase along with good crystal and optical properties. Further, to ascertain the useful properties of the synthesized ZnO nanopeanut as an excellent electron mediator, electrochemical sensors were fabricated based on the form of a screen printed electrode (SPE). Electrochemical and current-voltage characteristics were studied for the determination of picric acid sensing characteristics. The electrochemical sensor fabricated based on the SPE technique exhibited a reproducible and reliable sensitivity of ~1.2 μA/mM (9.23 μA·mM−1·cm−2), a lower limit of detection at 7.8 µM, a regression coefficient (R2) of 0.94, and good linearity over the 0.0078 mM to 10.0 mM concentration range. In addition, the sensor response was also tested using simple I-V techniques, wherein a sensitivity of 493.64 μA·mM−1·cm−2, an experimental Limit of detection (LOD) of 0.125 mM, and a linear dynamic range (LDR) of 1.0 mM–5.0 mM were observed for the fabricated picric acid sensor.

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Section: Resultsmentioning

confidence: 99%

A Highly-Sensitive Picric Acid Chemical Sensor Based on ZnO Nanopeanuts

et al. 2017

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“…Picric acid, one of the phenols, will do massive damages to human eyes, skin and respiratory systems [9]. The detection of picric acid is of great importance because a large amount of industries such as organic synthesis and drugs analysis all inevitably involve picric acid [10], which imposes severe risks on human health and the environment.As a consequence,many efforts have been devoted to the development of efficient technologies for the determination of picric acid in the environment.Several analytical methods have been developed for determining picric acid such as spectrophotometric [11], fluorescence [12,13], mass spectrometry [14,15], high-performance liquid chromatography [16], extraction [17], capillary electrophoresis [18], and electrochemical methods [19][20][21][22]. Compared to the above-mentioned methods, electrochemical techniques have advantages such as simplicity, selectivity, rapidity, low cost and easy miniaturization [23,24].…”

Section: Introductionmentioning

confidence: 99%

Quantification of picric acid on nanosphere polypyrrole modified electrode by stripping voltammetric method

et al. 2019

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The electrochemical studies of picric acid were carried out in acidic, neutral and basic buffer media at bare glassy carbon (GC) and polypyrrole modified GC electrode. Cyclic Voltammogram (CV) of picric acid exhibited three reduction peaks at -0.4, -0.8 and -1.5V (vs. Ag/AgCl) and two oxidation peaks at 0.8 and 1.4V (vs. Ag/AgCl). Among the various pH studied, highly sensitive response was observed at pH 1.0. The effect of scan rate was studied between 25 and 500 mVs-1 at the optimal pH.CV results revealed the adsorption-controlled reaction at the electrode surface. The GC electrode was modified with polypyrrole conducting polymer film to enhance the electrocatalytic activity of the reductive species. Atomic force microscopy (AFM) images showed the nanosphere morphology of the polypyrrole film, which was coated uniformly on the electrode surface. Under optimum experimental conditions, the influence of concentration on the stripping signal was studied. The linear range of detection was found between 50 ppb and 250 ppb with the lower limit of detection of 10±3 ppb.

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“…developed anthracene/porphyrin functionalized optical fiber which was the first sensor synthesized for the detection of PA . In recent years, graphene oxide fabricated on gold microelectrode (PyCD‐rGO) as well as polyethyleneimine stabilized Ag nanocluster were reported in literature for the selective detection of PA . Also, very recently, donor‐acceptor based triaminophenylbenzene systems were developed for the sensing of polynitroaromatic compounds ,.…”

Section: Introductionmentioning

confidence: 99%

Novel 2‐Arylbenzothiazoles: Selective Chromogenic and Fluorescent Probes for the Detection of Picric Acid

2018

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A series of 2‐arylbenzothiazoles has been designed and synthesized as chromogenic and fluorescent probes for the detection of picric acid (PA) over other nitro analytes. A straightforward condensation of a variety of aryl nitriles with 2‐aminobenzenethiol under metal‐ and base‐free conditions afforded the corresponding products in 26–98% yields. All 2‐arylbenzothiazoles could efficiently sense PA at micromolar levels. The highly sensitive compound 2‐(4‐((2‐methyl‐1H‐imidazol‐1‐yl)methyl)phenyl)benzo[d]thiazole (3c) showed 95% fluorescence quenching on addition of 1.0 eq of PA which can be attributed to hydrogen bonding and ground state charge transfer complex formation with a detection limit of 19.0 μM. The high sensitivity of 3 c for PA detection was also established by test strips experiment. The sensing mechanism was explored by 1H NMR titrations and Job's plot.

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Selective detection of picric acid using functionalized reduced graphene oxide sensor device

Cited by 59 publications

References 38 publications

A Highly-Sensitive Picric Acid Chemical Sensor Based on ZnO Nanopeanuts

A Highly-Sensitive Picric Acid Chemical Sensor Based on ZnO Nanopeanuts

Quantification of picric acid on nanosphere polypyrrole modified electrode by stripping voltammetric method

Novel 2‐Arylbenzothiazoles: Selective Chromogenic and Fluorescent Probes for the Detection of Picric Acid

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