ZnO-based nanostructured electrodes for electrochemical sensors and biosensors in biomedical applications

Shetti, Nagaraj P.; Bukkitgar, Shikandar D.; Reddy, Kakarla Raghava; Reddy, Ch. Venkata; Aminabhavi, Tejraj M.

doi:10.1016/j.bios.2019.111417

Cited by 335 publications

(143 citation statements)

References 130 publications

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“…On the nanoscale, ZnO shows exceptional physicochemical properties that are beneficial in many industrial applications. Many researchers have successfully used ZnO nanostructures in photocatalytic [13][14][15][16], photovoltaic [17][18][19][20], biomedical [21][22][23][24] and sensing [25][26][27][28][29][30][31] applications, as it provides large surface area as compared to its bulk counterpart. The demand of highly efficient, durable and robust photocatalysts for wastewater treatment makes ZnO nanostructures a reliable candidate for photocatalytic applications.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Sonochemical Synthesis of ZnO Nanoparticles for Photocatalytic Applications, Modelling and Optimization

et al. 2019

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This present study proposed a successful one pot synthesis of zinc oxide nanoparticles (ZnO NPs) and their optimisation for photocatalytic applications. Zinc chloride (ZnCl2) and sodium hydroxide (NaOH) were selected as chemical reagents for the proposed study. The design of this experiment was based on the reagents’ amounts and the ultrasonic irradiations’ time. The results regarding scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy confirmed the presence of ZnO NPs with pure hexagonal wurtzite crystalline structure in all synthesised samples. Photocatalytic activity of the developed samples was evaluated against methylene blue dye solution. The rapid removal of methylene blue dye indicated the higher photocatalytic activity of the developed samples than untreated samples. Moreover, central composite design was utilised for statistical analysis regarding the obtained results. A mathematical model for the optimisation of input conditions was designed to predict the results at any given point. The role of crystallisation on the photocatalytic performance of developed samples was discussed in detail in this novel study.

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Section: Introductionmentioning

confidence: 99%

One-Pot Sonochemical Synthesis of ZnO Nanoparticles for Photocatalytic Applications, Modelling and Optimization

et al. 2019

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“…Electrochemical investigations favour significant advantages such as simplicity in design, higher sensitivity and selectivity, low cost equipment, lower power need and easy to integrate within the microfluidic devices compared to other proposed methods [48] , [49] , [50] . Electrochemical investigations have also demonstrated excellent applications in health care applications [51] , [52] . Recently, the World has witnessed the outbreaks of diseases associated with viruses such as Ebola, MERS-CoV, SARS-CoV-1 and SARS-CoV-2 highlighting the need for rapid testing kit that can be used in the community to avoid further pandemic.…”

Section: Current Scenario In the Detection Of Virusesmentioning

confidence: 99%

Electrochemical investigations for COVID-19 detection-A comparison with other viral detection methods

Bukkitgar

Shetti

Aminabhavi³

2021

Chemical Engineering Journal

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“…Based on the transduction mechanism used, optical, electrochemical and piezoelectric sensors can be distinguished. To improve their performance, modifying layers made from polysaccharide , conducting polymers , carbon nanomaterials , ZnO and TiO 2 nanoparticles , biological receptors , nanosilica and zeolites are introduced.…”

Section: Introductionmentioning

confidence: 99%

The Mn‐zeolite/Graphite Modified Glassy Carbon Electrode: Fabrication, Characterization and Analytical Applications

2020

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In this work, low‐cost and environmentally friendly natural zeolite exchanged with Mn2+ cations was used for the first time to modify the glassy carbon electrode with the aim to obtain a fast and simple sensor for voltammetric determination of paracetamol (PAR). The Mn‐zeolite/graphite modified glassy carbon electrode (MnZG−GCE) was prepared by evaporation of solvent from dispersion of the zeolite/graphite mixture with the polymer in acetone. The electrochemical characteristics of MnZG−GCE were conducted by electrochemical impedance spectroscopy and cyclic voltammetry. Compared with graphite modified GCE (G−GCE), MnZG−GCE exhibited better electrochemical parameters, which confirms the superiority of applying zeolite in the proposed sensor. The optimization of the pH‐value of supporting electrolyte and instrumental parameters were carried out. The peak current was proportional to the concentration of PAR in a phosphate buffer saline of pH 6.0 in the range from 0.029 to 0.69 mg L−1 (R=0.9997) with limit of detection of 8.8 μg L−1. Finally, the proposed electrode was successfully applied to determine the paracetamol in pharmaceutical formulation and certified reference materials. The satisfactory recoveries, which ranged from 89.2 to 102.7 %, were obtained for all studied samples. It confirmed the attractiveness of relatively inexpensive, easy to fabricate and non‐toxic MnZG−GCE in determination of PAR in complicated matrixes.

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ZnO-based nanostructured electrodes for electrochemical sensors and biosensors in biomedical applications

Cited by 335 publications

References 130 publications

One-Pot Sonochemical Synthesis of ZnO Nanoparticles for Photocatalytic Applications, Modelling and Optimization

One-Pot Sonochemical Synthesis of ZnO Nanoparticles for Photocatalytic Applications, Modelling and Optimization

Electrochemical investigations for COVID-19 detection-A comparison with other viral detection methods

The Mn‐zeolite/Graphite Modified Glassy Carbon Electrode: Fabrication, Characterization and Analytical Applications

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