Semiconducting Nanostructures and Nanocomposites for the Recognition of Toxic Chemicals (A Review)

Ameen, Sadia; ShaheerAkhtar, M.; Hyungshikshin, Hyungshikshin

doi:10.13005/ojc/290302

Cited by 10 publications

(6 citation statements)

References 82 publications

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“…The SPR band of ZnONPs decreases with increasing the pH of Regla seed extract to pH=11 accompanied by a red shift in the SPR band to 355 nm indicating the formation of smaller size uniform nanoparticles. Ameen et al (2013) [47] reported that the appearance of an SPR band in the region 300-400 nm confirmed the formation of ZnONPs. This shorter wavelength indicates that the particles have smaller sizes (see below).…”

Section: Effect Of Portulaca Oleracea (Regla Seeds) Extract Phmentioning

confidence: 99%

Green synthesis of zinc oxide nanoparticles using Portulaca oleracea (Regla seeds) extract and its biomedical applications

et al. 2020

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In the present study, the biosynthesis of ZnONPs utilizing Portulaca oleracea seeds aqueous extract has been reported. The reported method is a green, plant-extract mediated and low-cost approach that is capable of synthesizing ZnONPs at pH 7 with heating at 60 o C for one hour. To demonstrate the efficiency of the capping bioorganic molecules on ZnO nanoparticles, a part of the product was dried at 60 o C (denoted ZnO-60) and the other part was annealed at 500 o C (denoted ZnO-500). Both synthesized ZnONPs was crystalline in nature and hexagonal in shape with an average size of 14 nm and 34.5 nm for ZnO-60 and ZnO-500, respectively, as evidenced by XRD and TEM analysis. The synthesized nanoparticles showed high antioxidant, good antibacterial activity, which has inhibited the growth of Helicobacter pylori (ATCC 700392) and Methicillin-Resistant Staphylococcus aureus bacteria and anticancer activity for HCT-116 cells with a higher efficiency of ZnO-60 than ZnO-500

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Section: Effect Of Portulaca Oleracea (Regla Seeds) Extract Phmentioning

confidence: 99%

Green synthesis of zinc oxide nanoparticles using Portulaca oleracea (Regla seeds) extract and its biomedical applications

et al. 2020

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“…The conductivities of CPs can be altered by modifying the electronic structures through doping or de-doping processes [9,10]. The fabrication of efficient chemical sensor using CPs as a sensitive material can provide the active working electrode and fast response towards the detection of either important or harmful chemicals [11,12]. Polypyrrole (PPy), Polythiophene (PTh), poly-1, 5-diaminonaphthalene (PDAN) and polyaniline (PANI) are regarded as potential CPs for chemical sensor fabrication.…”

Section: Introductionmentioning

confidence: 99%

Development of Melamine Electrochemical Sensor Using Molecularly Imprinted Conducting Polyanilne-Oxalic Acid Blend as a Molecular Recognition Element

Regasa

Femi

Soreta

et al. 2020

NHC

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In the present work, oxalic acid doped molecularly imprinted conducting polyaniline film for melamine detection was prepared by in-situ-electrochemical polymerization on the glassy carbon electrode (GCE) using melamine as template. The optimal monomer/template molar ratio was attained to be 0.2:0.1:0.01 (aniline: oxalic acid: melamine) and molecular recognition properties towards melamine were evaluated by differential pulse voltammetry. Under optimal conditions the imprinted polymer film was used to detect different concentrations of melamine in standard solutions and real milk samples. Compared with the nonimprinted polymer (NIP), the molecularly imprinted polymer (MIP) film showed higher affinity and sensitivity towards melamine with a linear range, quantification limit and detection limit of 0.5-200 nM, 1.375 nM and 0.413 nM respectively. Furthermore, the polymer blend film showed good selectivity toward melamine, stability, reproducibility and practical applications for the determination of melamine in infant formula milk with the recovery of 92.32-102.49%. The doping of the polymer with oxalic acid enhanced the conductivity and sensitivity of the sensor.

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“…of modified electrodes [31][32][33][34] . EIS on PAni and its derivatives modified electrodes have been reported [34][35][36][37] This work reports on the electrochemical behaviour and catalytic ability of poly(Ani-co-oPDA) modified CG electrode towards electro-oxidation of AA.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Activity and Electrochemical Impedance Spectroscopy of Poly(Aniline-Co-Ortho-Phenylenediamine) Modified Electrode on Ascorbic Acid

Parsa¹,

Amanzadeh-Salout²

2016

Orient. J. Chem

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The poly(aniline-co-ortho-phenylenediamine) modified composite graphite (poly(Anico-oPDA)/CG)) has shown excellent electrocatalytic response towards the oxidation of ascorbic acid (AA). The anodic peak potential (E pa ) of AA has shifted from +0.48 V (bare CG) to +0.17 V (poly(Ani-co-oPDA/CG)). The anodic peak currents (I pa ) are linearly dependent upon the square root of scan rate indicating a favourable diffusion controlled process. The electro oxidation of AA on poly(Ani-co-oPDA/CG is more feasible in acidic medium than in either neutral or alkaline medium. This is shown by negative shift of E pa . The charge transfer resistance (R ct ) at the poly(Ani-co-oPDA/ CG) shows that the rate of the electro oxidation of AA changes with electrode potential. The R ct and diffusion process are dependant not only on applied potential and electrode material but also on the AA.The poly(aniline-co-ortho-phenylenediamine) modified composite graphite (CG) electrode has shown excellent electrocatalytic response towards the oxidation of ascorbic acid (AA). Charge transfer resistance (R ct ) at the poly(Ani-co-oPDA/CG) shows that the rate of the electro oxidation of AA changes with electrode potential.

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Semiconducting Nanostructures and Nanocomposites for the Recognition of Toxic Chemicals (A Review)

Cited by 10 publications

References 82 publications

Green synthesis of zinc oxide nanoparticles using Portulaca oleracea (Regla seeds) extract and its biomedical applications

Green synthesis of zinc oxide nanoparticles using Portulaca oleracea (Regla seeds) extract and its biomedical applications

Development of Melamine Electrochemical Sensor Using Molecularly Imprinted Conducting Polyanilne-Oxalic Acid Blend as a Molecular Recognition Element

Electrocatalytic Activity and Electrochemical Impedance Spectroscopy of Poly(Aniline-Co-Ortho-Phenylenediamine) Modified Electrode on Ascorbic Acid

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