A new electrochemical sensor based on carboimidazole grafted reduced graphene oxide for simultaneous detection of Hg 2+ and Pb 2+

Xing, Huakun; Xu, Jingkun; Zhu, Xiaofei; Lu, Limin; Duan, Xuemin; Zhang, Youshan; Wang, Wenmin

doi:10.1016/j.jelechem.2016.10.043

Cited by 60 publications

(17 citation statements)

References 28 publications

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“…For the detection of heavy metal ions, some recently reported works include the combination of GN or graphene oxide with piperazine [44], carboimidazole [45], Co 3 O 4 nanoparticles [46] and PEDOT nanorods [47]. One could also mention a recent review by Zuo et al [48] which summarizes the progress made in the past few years in the field of sensors dedicated to heavy metal ions, based on GN-derived materials.…”

Section: Introductionmentioning

confidence: 99%

Montmorillonite clay-modified disposable ink-jet-printed graphene electrode as a sensitive voltammetric sensor for the determination of cadmium(II) and lead(II)

et al. 2020

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This work describes a new sensitive sensor for the simultaneous electrochemical determination by square wave anodic stripping voltammetry of Cd 2+ and Pb 2+ ions in aqueous solution, based on a disposable ink-jet-printed graphene electrode (IPGE) modified by a thin film of montmorillonite (Mont) clay mineral. The clay was characterized by X-ray diffraction and scanning electron microscopy while the Mont-IPGE was analyzed by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry before its exploitation for sensing studies. EIS results revealed a low electron transfer rate on Mont-IPGE during the electro-oxidation of [Fe(CN) 6 ] 3−. The stripping response on both Cd 2+ and Pb 2+ analytes was improved by the in situ co-deposition with bismuth, added to the electrolyte solution, on the clay substrate. The proposed electrode showed great stability and good reproducibility. The key experimental parameters governing the stripping analysis of Cd 2+ and Pb 2+ were optimized. A linear relationship between peak currents and concentrations of the analytes was obtained in the range from 0.01 to 0.21 µM, leading to detection limits of 0.42 nM for Cd 2+ and 1.14 nM for Pb 2+ ions, respectively (S/N = 3). The sensitivities to Cd 2+ and Pb 2+ ions were 921.8 A cm −2 M −1 and 1960.8 A cm −2 M −1 , respectively. The Mont-IPGE sensor was used for the quantification of lead and cadmium in a mineral water.

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Section: Introductionmentioning

confidence: 99%

Montmorillonite clay-modified disposable ink-jet-printed graphene electrode as a sensitive voltammetric sensor for the determination of cadmium(II) and lead(II)

et al. 2020

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“…The peak of 5 s approximately 2.25 mA. The reduction peak become slightly increase due to the capacity binding on the gold electrode itself according to the absorption capacity of target ion stated by (Xing et al, 2016). In other words, the times between 5 s to 10 s indicated that the zinc ion was actively binding on surface of the gold electrode at 5 s. Therefore, 5 s was selected as an accumulation time.…”

Section: Fp-18 Fp-21 Optimal Parameters Of Developed Acetylcholinestementioning

confidence: 99%

Biotechnology for Sustainable Development to Meet Global Challenges

2018

Int J Pharma. Bio. Sci.

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Antimicrobial resistance (AMR) in food-borne pathogens especially Escherichia coli, is of a serious concern in recent years. Extended beta-lactamase resistant (ESBL) resistant E.coli species have recently emerged and have been the source of concern in both human and animal health. This study was conducted to detect the presence of ESBL resistant E.coli in raw chicken meat and bean sprouts in Kota Bharu, Kelantan by using Kirby-Bauer methods for antibiotic sensitivity test (AST) and molecular detection of the ESBL resistance encoding genes by using polymerase chain reaction (PCR). A total of 100 samples comprised of 50 raw chicken meat and 50 bean sprouts were collected and processed microbiologically. Out of 100 food samples that were collected and processed through routine microbiological isolation, 31% (31/100) of E. coli were identified phenotypically. However, based on PCR results, 93.5% (29/31) of the phenotypically detected isolates were confirmed as E.coli. Raw chicken meat yielded 46% (23/50) E.coli isolates while 12% (6/50) E. coli was isolated from bean sprouts samples. Based on the results of AST, raw chicken meat showed highest percentage of antimicrobial resistance, 95.7% (22/23) against Amoxycillin/Clavulanic Acid, followed by Enrofloxacin 60.9% (14/23), Colistin 39.1% (9/23) and Gentamicin 30.4% (7/23). Whereas for bean sprouts, highest percentage of antimicrobial resistance was observed towards Amoxycillin/Clavulanic Acid with the percentage of 33.3% (2/6), followed by Colistin 16.7% (1/6). ESBL gene resistance detection against family of bla TEM and bla CTX genes showed that 62.1% (18/29) of E.coli isolates from both food samples were positive for bla TEM gene and all the isolates were negative for blaCTX. Out of 18 samples positive resistance towards bla TEM gene, 94.4% (17/18) were from raw chicken meat and 5.6% (1/18) were from bean sprouts. In conclusion, ESBL resistant E.coli was detected in the food samples collected from local markets. These findings imply that ESBL resistant E.coli can easily contaminate raw food items such as chickens and vegetables and may pose public health risks. Hence, rational usage of antibiotics and strict practicing of hygienic handling of food items, especially chicken meat and vegetables are recommended.

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“…However, due to the strong agglomerate formation properties of graphene layers, the applicability of graphene is substantially limited. On the contrary, graphene oxide has other several properties unlike from graphene, such as controllable electronic specifications, manifold oxygen moieties and hydrophilicity [37–40].…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Sensing Platform Based on Graphene Oxide and Molecularly Imprinted Polymer Modified Electrode for Selective Detection of Amoxicillin

et al. 2020

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An electrochemical sensing platform based on composite material, consisting of molecularly imprinted polymer coated on graphene oxide (MIP‐GO), was developed for selective and sensitive analysis of amoxicillin (AMOX). The MIP‐GO composite, which was fabricated by sol‐gel polymerization after removal of template molecule, was deposited as a thin film on glassy carbon electrode, and then was electrochemically characterized by cyclic voltammetry and differential pulse voltammetry. The linear response for the determination of AMOX was obtained in the concentration range from 5.0×10−10 to 9.1×10−7 M under the most proper conditions and the detection limit was found to be 2.94×10−10 M.

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A new electrochemical sensor based on carboimidazole grafted reduced graphene oxide for simultaneous detection of Hg 2+ and Pb 2+

Cited by 60 publications

References 28 publications

Montmorillonite clay-modified disposable ink-jet-printed graphene electrode as a sensitive voltammetric sensor for the determination of cadmium(II) and lead(II)

Montmorillonite clay-modified disposable ink-jet-printed graphene electrode as a sensitive voltammetric sensor for the determination of cadmium(II) and lead(II)

Biotechnology for Sustainable Development to Meet Global Challenges

An Electrochemical Sensing Platform Based on Graphene Oxide and Molecularly Imprinted Polymer Modified Electrode for Selective Detection of Amoxicillin

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