Electrochemical detection of ammonia solution using tin oxide nanoparticles synthesized via sol–gel route

Arya, Sandeep; Riyas, Mohammad; Sharma, Asha; Singh, Bikram; Prerna,; Bandhoria, Pankaj; Khan, Saleem; Bharti, Vishal

doi:10.1007/s00339-018-1968-8

Cited by 31 publications

(14 citation statements)

References 33 publications

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“…This has led to the exploitation of 3D nanomaterials to improve the impedance of microelectrodes. Gold nanostructures [ 13 – 17 ], carbon nanotubes (CNTs) [ 21 , 33 , 34 ], vertically aligned silicon nanowires (Si NWs) [ 35 – 37 ], vertically aligned platinum nanowires (Pt NWs) [ 38 , 39 ] and tin oxide nanowires (SnO 2 NWs) [ 40 – 43 ] are the most common nanomaterials that have been used to increase surface area. While these nanomaterials have successfully been used in neural applications, it is difficult to control their fabrication for various topographies, particularly on flexible substrates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of encapsulated ZnO nanowires provide low impedance alternatives for microelectrodes

et al. 2022

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Microelectrodes are commonly used in electrochemical analysis and biological sensing applications owing to their miniaturised dimensions. It is often desirable to improve the performance of microelectrodes by reducing their electrochemical impedance for increasing the signal-to-noise of the recorded signals. One successful route is to incorporate nanomaterials directly onto microelectrodes; however, it is essential that these fabrication routes are simple and repeatable. In this article, we demonstrate how to synthesise metal encapsulated ZnO nanowires (Cr/Au-ZnO NWs, Ti-ZnO NWs and Pt-ZnO NWs) to reduce the impedance of the microelectrodes. Electrochemical impedance modelling and characterisation of Cr/Au-ZnO NWs, Ti-ZnO NWs and Pt-ZnO NWs are carried out in conjunction with controls of planar Cr/Au and pristine ZnO NWs. It was found that the ZnO NW microelectrodes that were encapsulated with a 10 nm thin layer of Ti or Pt demonstrated the lowest electrochemical impedance of 400 ± 25 kΩ at 1 kHz. The Ti and Pt encapsulated ZnO NWs have the potential to offer an alternative microelectrode modality that could be attractive to electrochemical and biological sensing applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis of encapsulated ZnO nanowires provide low impedance alternatives for microelectrodes

et al. 2022

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“…For improving the sensitivity of electrochemical sensors, different metal/metal oxide nanomaterials have been utilized, for example, Ag, Au, NiO, Co 3 O 4 , ZnO, SnO, ZrO, and so forth. − The modification of a bare electrode with metal oxide nanomaterials not only improves its performance but also offers different advantages such as low cost, easy synthesis procedure, simple modification process, and enhanced sensitivity. − Among the transitional metal oxides, one of the most promising entities is the CuO nanostructures having diverse applications in the sensors, solar energy transformation, catalysis, adsorption, and magnetic storage media. − With 1.2–1.5 eV narrow band gap, CuO has been massively exploited in the field of electrochemical sensors and energy storage . CuO is a simple p-type semiconductor with unique characteristics and applications in different modern fields.…”

Section: Introductionmentioning

confidence: 99%

Nonenzymatic Electrochemical Detection of 2,4,6-Trichlorophenol Using CuO/Nafion/GCE: A Practical Sensor for Environmental Toxicants

et al. 2021

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2,4,6-Trichlorophenol (2,4,6 TCP) is one of the hazardous toxicants, which has severe impacts on the environment and human health. This study is designed to develop a highly sensitive and selective electrochemical sensor based on CuO nanostructures for the detection of 2,4,6 TCP. The CuO nanostructures were synthesized through an aqueous chemical growth method and characterized by versatile analytical techniques, for example, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, atomic force microscopy, energy-dispersive spectrometry, and X-ray diffraction. The characterization tools revealed a high crystalline nature, exceptional phase purity, nanoball morphology with an average size of around 18.7 nm for the CuO nanostructures. The synthesized material was used to modify a glassy carbon electrode (GCE) with the help of Nafion as a binder to improve its efficiency and sensitivity. The CuO/Nafion/GCE was proven to be a potential sensor for the determination of 2,4,6 TCP under optimized conditions at a scan rate of 70 mV/s, potential range of 0.1–1.0 V, and phosphate buffer of neutral pH as the supporting electrolyte. The linear range for 2,4,6 TCP was set from (1 to 120 μM) with a low limit of detection value calculated to be 0.046 μM. The developed sensor was effectively applied for water samples with acceptable recovery values from 95.9 to 100.6%.

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“…Ammonia (NH 3 ) is a typical hazardous and irritant gas which can induces toxicity to the environment and sensitive ecosystems, therefore, a range of techniques have been employed to achieve the sensitive detection of NH 3 , including nanowires, 17,18 metal oxide, 19 reduced graphene oxide, 20 laser-coupled spectroscopy, 21 etc. Despite the great potentialities as an ideal candidate for solid state gas sensors, graphene based ammonia sensors are still struggling as the sensor response is relatively much lower (typically less than 5%) as compared to other gas species sensed with pristine graphene.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of BP2T functionalized graphene via non-covalent π–π stacking interactions for enhanced ammonia detection

Duan

Sher

et al. 2021

RSC Adv.

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Electrochemical detection of ammonia solution using tin oxide nanoparticles synthesized via sol–gel route

Cited by 31 publications

References 33 publications

Synthesis of encapsulated ZnO nanowires provide low impedance alternatives for microelectrodes

Synthesis of encapsulated ZnO nanowires provide low impedance alternatives for microelectrodes

Nonenzymatic Electrochemical Detection of 2,4,6-Trichlorophenol Using CuO/Nafion/GCE: A Practical Sensor for Environmental Toxicants

Fabrication of BP2T functionalized graphene via non-covalent π–π stacking interactions for enhanced ammonia detection

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