Ammonia gas sensing characteristics of V2O5 nanostructures: A combined experimental and ab initio density functional theory approach

Akande, Amos Adeleke; Mosuang, Thuto; Ouma, Cecil Naphtaly Moro; Benecha, Evans M.; Tesfamicheal, Tuquabo; Roro, Kittessa T; Machatine, Augusto Gonçalo Jose; Mwakikunga, Bonex W

doi:10.1016/j.jallcom.2019.153565

Cited by 19 publications

(7 citation statements)

References 29 publications

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“…Interdigitated electrode (IDE) type have been widely used for sensors laboratory research, prototyping and manufacturing of sensors and related products. This is a cost-effective method which often made from an aluminum oxide (Al 2 O 3 ) substrate whose front-side surface is coated with platinum (Pt) metal in comb-like structures for sensors electrical signal measurement and the rear-side coated with nickel (Ni) metal as Microheater [9,24]. Figure 1 showed a schematic layout of KSGA565 KENOSTATIC gas detection station where μ-nano IDE was used as the sensor's electrode.…”

Section: Advance Manufacturing Methods For Chemical Gas and Bio Sensmentioning

confidence: 99%

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Micro Nano Manufacturing Methods for Chemical, Gas and Bio Sensors, Water Purification and Energy Technologies

Akande¹,

Adeleye²,

Adenle³

et al. 2021

Nanofibers - Synthesis, Properties and Applications

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This chapter reports on the various methods of fabricating and manufacturing micro and nano sensor, membrane and energy devices. Firstly, the characteristic often sought after by scientists and engineers for effective and efficient performance of these technologies were thoroughly discussed in details together with the characterization techniques for evaluating them. Several state-of-the-art fabricating techniques for sensor devices, water and medical based-membranes, solar cells and batteries were also discussed.

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Section: Advance Manufacturing Methods For Chemical Gas and Bio Sensmentioning

confidence: 99%

“…Adapted from Ref. [24]. A typical process involving the fabrication of TiO2 nanowires-based gas sensor is shown in Figure 2.…”

Section: Schematic Diagram Of Ksga565 Kenosistec Gas Sensing Station mentioning

confidence: 99%

Micro Nano Manufacturing Methods for Chemical, Gas and Bio Sensors, Water Purification and Energy Technologies

Akande¹,

Adeleye²,

Adenle³

et al. 2021

Nanofibers - Synthesis, Properties and Applications

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“…One-dimensional V 2 O 5 nanostructures such as nanorods (NRs) are also very popular for gas sensing purposes [44]. In an effort by Raj et al [45], V 2 O 5 NRs with diameters in the range of 100-200 nm were synthesized using a solvothermal method.…”

Section: (Chmentioning

confidence: 99%

A Review of Nanostructured Resistive-Based Vanadium Oxide Gas Sensors

et al. 2020

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Vanadium pentoxide (V2O5) is a transition metal oxide with features such as high availability, good catalytic activity, unique electrical properties and high conductivity which are appropriate for gas sensing applications. In this review, we discuss different gas sensing aspects of V2O5 in pristine, doped, decorated and composite forms. Depending on its synthesis procedure, morphology, sensing temperature and surface conditions, the V2O5-based gas sensors show different responses to target gases. Herein, we have discussed the behavior of V2O5-based gas sensors to different gases and associated sensing mechanisms. This review paper can be a useful reference for the researchers who works in the field of gas sensors.

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“…Owing to a combination of layered structure [ 1 ] with a large amount of oxygen vacancies and vanadium reactivity in redox reactions, V 2 O 5 is a very promising material for various applications, such as cathode material for various ion batteries [ 2 , 3 , 4 , 5 , 6 ], a component of antibacterial coatings [ 7 ], photocatalysts [ 8 ], electrochromic material [ 9 , 10 , 11 ], charge transfer component in photovoltaics [ 12 , 13 ], etc. In particular, V 2 O 5 is a prospective receptive layer in gas sensors for the detection of NO 2 [ 14 , 15 ], NH 3 [ 16 , 17 ], methane [ 18 ], various volatile organic compounds (VOC)—xylene [ 19 ], trimethylamine [ 20 ], etc. Among these analytes, xylene stands out as a member of the “BTEX” family of compounds—benzene, toluene, ethylbenzene, and xylene.…”

Section: Introductionmentioning

confidence: 99%

Microextrusion Printing of Hierarchically Structured Thick V2O5 Film with Independent from Humidity Sensing Response to Benzene

et al. 2022

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The process of V2O5 oxide by the combination of sol-gel technique and hydrothermal treatment using heteroligand [VO(C5H7O2)2–x(C4H9O)x] precursor was studied. Using thermal analysis, X-ray powder diffraction (XRD) and infra-red spectroscopy (IR), it was found that the resulting product was VO2(B), which after calcining at 300 °C (1 h), oxidized to orthorhombic V2O5. Scanning electron microscopy (SEM) results for V2O5 powder showed that it consisted of nanosheets (~50 nm long and ~10 nm thick) assembled in slightly spherical hierarchic structures (diameter ~200 nm). VO2 powder dispersion was used as functional ink for microextrusion printing of oxide film. After calcining the film at 300 °C (30 min), it was found that it oxidized to V2O5, with SEM and atomic force microscopy (AFM) results showing that the film structure retained the hierarchic structure of the powder. Using Kelvin probe force microscopy (KPFM), the work function value for V2O5 film in ambient conditions was calculated (4.81 eV), indicating a high amount of deficiencies in the sample. V2O5 film exhibited selective response upon sensing benzene, with response value invariable under changing humidity. Studies of the electrical conductivity of the film revealed increased resistance due to high film porosity, with conductivity activation energy being 0.26 eV.

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Ammonia gas sensing characteristics of V2O5 nanostructures: A combined experimental and ab initio density functional theory approach

Cited by 19 publications

References 29 publications

Micro Nano Manufacturing Methods for Chemical, Gas and Bio Sensors, Water Purification and Energy Technologies

Micro Nano Manufacturing Methods for Chemical, Gas and Bio Sensors, Water Purification and Energy Technologies

A Review of Nanostructured Resistive-Based Vanadium Oxide Gas Sensors

Microextrusion Printing of Hierarchically Structured Thick V2O5 Film with Independent from Humidity Sensing Response to Benzene

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