An electrochemical sensor for the detection of <i>p</i>-nitrophenol based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid

Zhou, Yongying; Zhao, Jin; Li, Sheng‐Hua; Guo, Ming‐Lin; Fan, Zhi

doi:10.1039/c9an00722a

Cited by 49 publications

(32 citation statements)

References 33 publications

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“…The electrochemical reduction peak current of I and II gradually increases with increasing the scan rate from 0.01 to 1.0 Vs −1 . Further, a good linear relationship between reduction peak currents and square root of scan rates ( v 1/2 ) was observed (Figure 11B,D), indicating that the reduction of analytes at the fabricated electrode is a diffusion controlled process 28 . However, the reduction potentials were not changed much while increasing the scan rate (Figure 11A,C,E).…”

Section: Resultsmentioning

confidence: 82%

“…Further, a good linear relationship between reduction peak currents and square root of scan rates (v 1/2 ) was observed ( Figure 11B,D), indicating that the reduction of analytes at the fabricated electrode is a diffusion controlled process. 28 However, the reduction potentials were not changed much while increasing the scan rate ( Figure 11A,C,E). Normally, the CV results of low scan rate give a small peak current but taking the more measuring time.…”

Section: Effect Of Scan Ratementioning

confidence: 94%

“…Recently, a significant attention has been received on electrochemical techniques to overcome these restrictions [23][24][25][26][27] because of their more sensitivity, low-cost, user-friendly, reproducibility, lowlimit of detection, and selectivity. [28][29][30] The NP detection using conventional electrodes were inadequate due to their poor electrocatalytic efficiencies and electrode fouling. Therefore, various modification procedures recently have been carried out to improve their electrocatalytic performance towards the detection of NP isomers such as metal (hybrid inorganic-organic/Pt and CuNP/Au), 31,32 diamond, 33 RGO/Au/GCE 34 and AuNp/ graphite, 35 nanoporous gold, 36 macroporous imprinted polymer, 37 porous copper, 38 multi-walled carbon nanotubes 39 and bismuth film.…”

Section: Introductionmentioning

confidence: 99%

“…However, significant limitation/challenges remain continued in these methods, such as low sensitivity, high cost, skilled analyst, time‐consuming and multi‐step preparation. Recently, a significant attention has been received on electrochemical techniques to overcome these restrictions 23‐27 because of their more sensitivity, low‐cost, user‐friendly, reproducibility, low‐limit of detection, and selectivity 28‐30 …”

Section: Introductionmentioning

confidence: 99%

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Nickel hexacyanoferrate film coated pencil graphite electrode as sensor and electrode material for environment and energy applications

et al. 2020

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In this present work, a simple electroless deposition method is used for the fabrication of hexacyanoferrate(III)-nickel deposited pencil graphite (HCF-Ni-PGE) electrode and applied as an electrochemical sensor for selective and simultaneous determination of ortho-I and para-nitrophenol II isomers. The fabricated HCF-Ni-PGE was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, and elemental mapping. The electrochemical analysis was carried out using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques in 0.1 M KCl containing K 4 [Fe(CN) 6 ]. The redox (Fe 2+/3+) peak currents were enormously increased due to the successful enhancement in the electroactive surface area of PGE from 0.4 to 1.57 cm 2 for HCF-Ni-PGE. Further, CV and EIS support the HCF and Ni coating on the PGE surface enhanced the electronic conductivity of HCF-Ni-PGE. The electrochemical sensor application of HCF-Ni-PGE was analysed using CV and differential pulse voltammetry towards the determination of o-and p-NP in 0.1 M PBS (pH 6.0). The reduction currents of I and II at HCF-Ni-PGE was enhanced two times compared with the PGE with better resolution. This, the enhanced activity is due to the positive synergetic effect which increased an electroactive surface area, and electronic conductivity. The limit of detection (LOD) values at HCF-Ni-PGE for I and II isomers are 1.98 × 10 −7 and 1.43 × 10 −7 M with S/N = 3, respectively. The practical applicability of the electrochemical sensor has been investigated in the presence of common interfering agents such as Na + , SO 4 2− and phenol. The simple electroless deposition used for the fabrication of HCF-Ni-PGE electrode possessed high surface area and high conductivity, it can also be applicable in the field of energy storage devices of supercapacitor, and battery, fuel cells and solar cells as electrode materials and photocatalysts.

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Section: Resultsmentioning

confidence: 82%

Section: Effect Of Scan Ratementioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nickel hexacyanoferrate film coated pencil graphite electrode as sensor and electrode material for environment and energy applications

et al. 2020

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“…Other CDs derivatives for more specific electrochemical applications are represented by succinyl-CDs [17], per-6-deoxy-per-6-(2-carboxy-methyl)thio-β-cyclodextrin (AcSCD) [18], lipoyl-CDs [19] or disulfides bridged two adjacent β-CDs (DB-β-CDs) [20].…”

Section: Chemical Modifications Of Cds For Electrochemical Devicesmentioning

confidence: 99%

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

Casulli

Taurino

Carrara

et al. 2019

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Cyclodextrins (CDs) are oligosaccharides composed of six (α), seven (β) or eight (γ) glucose units. Their inner hydrophobic cavity and hydrophilic external surface enable the formation of the “host-guest inclusion complex” with different organic or inorganic molecules showing high molecular selectivity. For these characteristics, CDs have many potential applications in electrochemical sensing. To enable CDs immobilization on the electrode surfaces, different chemical modifications are needed depending of the electrode material, while nanomaterials have been exploited to enhance the sensing signal. The CDs binding onto gold nanoparticles or carbon nanotubes, as an electron-transfer mediator to the electrode surface, is a typical example of it, while also graphene is largely used. The aim of the present review is to give an overview of CDs properties and their applications to electrochemical sensors for medical diagnostics. Different kinds for the functionalization of CDs onto electrode surfaces will be reviewed as well as their performance in presence of nanomaterials. Finally, CDs-based devices for sensing biomedical molecules of biomedical interest will be briefly presented and discussed.

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Electrochemical Sensor for Detection of p‐Nitrophenol Based on Nickel Oxide Nanoparticles/α‐Cyclodextrin Functionalized Reduced Graphene Oxide

et al. 2020

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p‐Nitrophenol (p−NP) is a high priority toxic pollutant and that has harmful effects on human, animals and plants. Thus, the detection and determination of p−NP present in the environment is an urgent as well as highly important requisite. The present article, therefore focused on the construction of a novel electrochemical sensor based on NiO nanoparticles/α‐cyclodextrin functionalized reduced graphene oxide modified glassy carbon electrode (NiO−NPs‐α‐CD‐rGO‐GCE) for the selective and sensitive detection of p−NP. UV‐vis, high resolution transmission electron microscopy (HR‐TEM), selected area electron diffraction pattern (SAED) and X‐ray diffraction (XRD) analysis confirms the formation of highly pure NiO nanoparticles. Field emission scanning electron microscopy (FE‐SEM), energy dispersive X‐ray spectroscopy (EDS), and cyclic voltammetry (CV) were used to characterize the step‐wise electrode modification process. DPV was carried out to quantify p−NP within the concentration range of 1−10 μM and found the detection limit of 0.12 nM on the basis of the signal‐to‐noise ratio S/N=3. The electrode can able to detect different isomers of nitrophenols. Interferences of other pollutants such as phenol, p‐aminophenol, o‐ and m‐ nitrophenol, 4‐chlorophenol, 2,6‐dichlorophenol and ions like K+, Cd2+, Cl−, SO42− did not affect the sensing of p−NP. The newly developed sensor exhibited diffusion controlled kinetics and had excellent sensitivity, selectivity and reproducibility for the detection of p−NP. The electrode showed good recoveries in real sample analysis.

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An electrochemical sensor for the detection of p-nitrophenol based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid

Abstract: A novel electrochemical sensor based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid was constructed for the detection of p-nitrophenol.

Cited by 49 publications

References 33 publications

Nickel hexacyanoferrate film coated pencil graphite electrode as sensor and electrode material for environment and energy applications

Nickel hexacyanoferrate film coated pencil graphite electrode as sensor and electrode material for environment and energy applications

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

Electrochemical Sensor for Detection of p‐Nitrophenol Based on Nickel Oxide Nanoparticles/α‐Cyclodextrin Functionalized Reduced Graphene Oxide

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