VO nanofibres: novel gas sensors with extremely high sensitivity and selectivity to amines

Raible, Isabelle; Burghard, Marko; Schlecht, U.; Yasuda, Akio; Voßmeyer, Tobias

doi:10.1016/j.snb.2004.09.024

Cited by 199 publications

(14 citation statements)

References 17 publications

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“…However, there are few reports about transition to metallic phase of V 2 O 5 films around 530 to 553 K and surface metallicity of (001) facet around 340 to 400 K. − The MIT is also reported to be reversible . The metallic behavior makes V 2 O 5 applicable as gas sensors, , thermochromic devices, , and optical and electrical switches around the transition temperature.…”

Section: Introductionmentioning

confidence: 99%

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

et al. 2016

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Vanadium pentoxide (V2O5), the most stable member of vanadium oxide family, exhibits interesting semiconductor to metal transition in the temperature range of 530-560K. The metallic behavior originates because of the reduction of V2O5 through oxygen vacancies. In the present report, V2O5 nanorods in the orthorhombic phase with crystal orientation of (001), are grown using vapor transport process. Among three non-equivalent oxygen atoms in a VO5 pyramidal formula unit in V2O5 structure, the role of terminal vanadyl oxygen (OI) in the formation of metallic phase above the transition temperature is established from the temperature dependent Raman spectroscopic studies. The origin of the metallic behavior of V2O5 is also understood due to the breakdown of pd bond between OI and nearest V atom instigated by the formation of vanadyl OI vacancy, confirmed from the downward shift of the bottom most split-off conduction bands in the material with increasing temperature.

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Section: Introductionmentioning

confidence: 99%

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

et al. 2016

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“…Vanadium pentoxide (V 2 O 5 ), in orthorhombic structure, has been widely used in a variety of scientific and technological applications due to its highly anisotropic electrical and optical properties making it a promising compound for applications such as high-capacity lithium batteries [1,2], chemical sensors [3][4][5] and solar cells [3,4]. The most exploited morphologies are polycrystals [6], nanofibers [5,7], nanorods [8,9], nanotubes [10,11] and thin films [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The literature reports that orthorhombic V 2 O 5 has a typical lamellar structure [4,27,28] in which vanadium atoms have no unpaired electrons in their last shell (3d 0 ) [29]. In other words, it was observed that V 2 O 5 does not possess intrinsic magnetic moments and presents itself as a diamagnetic material [29].…”

Section: Introductionmentioning

confidence: 99%

Antiferromagnetism induced by oxygen vacancies in V₂O₅polycrystals synthesized by the Pechini method

Dreifus¹,

Godoy²,

Rabelo³

et al. 2015

J. Phys. D: Appl. Phys.

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View the article online for updates and enhancements. Related content Observation of superficial antiferromagnetism in Co3O4 polycrystals Driele von Dreifus, Ernesto Chaves Pereira and Adilson Jesus Aparecido de Oliveira-Cubic phase stability, optical and magnetic properties of Cu-stabilized zirconia nanocrystals Prativa Pramanik, Sobhit Singh, Deep Chandra Joshi et al.-Fe doping effect on the structural, magnetic and surface properties of SnO2 nanoparticles prepared by a polymer precursor method F H Aragón, J A H Coaquira, I Gonzalez et al.

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“…This value is comparable to other literature data. 40,43 Slightly worse results are obtained for the nanocomposite with GO (Figure 10c). In this case, the linear range is also lower than in the case of Ag x VO y as well as the detection limit.…”

Section: Resultsmentioning

confidence: 97%

Ag-Vanadates/GO Nanocomposites by Aerosol-Assisted Spray Pyrolysis: Preparation and Structural and Electrochemical Characterization of a Versatile Material

et al. 2017

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In this article, we describe the deposition by aerosol-assisted spray pyrolysis of different types of silver vanadate nanocomposites with and without graphene oxide (GO) on different substrates (carbon paper (CP) and fluorine-doped tin oxide (FTO)). When deposited on CP, different amounts of GO were added to the Ag and V precursor solution to study the effect of GO on the physicochemical properties of the resulting Ag-vanadate. It is shown that the addition of GO leads mainly to the formation of nanoparticles of the Ag2V4O11 phase, whereas Ag2V4O11 and Ag3VO4 are obtained without the addition of GO. The morphology and chemical properties of the composites were determined by scanning and transmission electron microscopies, X-ray diffraction, X-ray photoemission spectroscopy, and UV–visible and Raman spectroscopies. In addition, the photoelectrochemical (PEC) properties of such composites were studied by CV, linear sweep voltammetry, and electrochemical impedance spectroscopy. The ideal AgxVOy and GO ratio was optimized for obtaining higher photocurrent values and a good stability. The results showed that the presence of GO improves the electrical conductivity of the catalyst layer as well as the electron injection from the oxide to the electrode surface. The deposition of pure Ag2V4O11 on FTO does not lead to samples with stable PEC performances. Samples grown on CP supports showed an efficient electrochemical detection of small amounts of ethylenediamine in water solution

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VO nanofibres: novel gas sensors with extremely high sensitivity and selectivity to amines

Cited by 199 publications

References 17 publications

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

Antiferromagnetism induced by oxygen vacancies in V₂O₅polycrystals synthesized by the Pechini method

Ag-Vanadates/GO Nanocomposites by Aerosol-Assisted Spray Pyrolysis: Preparation and Structural and Electrochemical Characterization of a Versatile Material

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VO nanofibres: novel gas sensors with extremely high sensitivity and selectivity to amines

Cited by 199 publications

References 17 publications

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V2O5(001) Nanorods

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V2O5(001) Nanorods

Antiferromagnetism induced by oxygen vacancies in V2O5polycrystals synthesized by the Pechini method

Ag-Vanadates/GO Nanocomposites by Aerosol-Assisted Spray Pyrolysis: Preparation and Structural and Electrochemical Characterization of a Versatile Material

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Product

Resources

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Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

Role of Vanadyl Oxygen in Understanding Metallic Behavior of V₂O₅(001) Nanorods

Antiferromagnetism induced by oxygen vacancies in V₂O₅polycrystals synthesized by the Pechini method