Preparation and gas sensing property of Ag-supported vanadium oxide nanotubes

A facile microwave irradiation was used to synthesize Ag nanoparticle supported on vanadium oxide nanotubes (VONTs) in this paper. The VONTs on alumina tube installed with Pt electrodes were tested for gas sensing towards C 2 H 5 OH , NH 3 and C 6 H 5 CH 3 gases. Detailed studies showed that the sensing capabilities were greatly enhanced in comparison to those of pure nanotubes. It was found that the Ag nanoparticles supported on VONTs sensing films exhibited a high C 2 H 5 OH selectivity compared with NH 3 and C 6 H 5 CH 3 gases. When the sensor is exposed to C 2 H 5 OH , the ethanol molecules interact with the preadsorbed oxygen ions on the Ag nanoparticles surface. The ethanol oxidation on the Ag nanoparticles leads to the transfer of electrons into the semiconducting VONTs and this is reflected as the change in conductance of sensor. The presence of Ag nanoparticles on the surface of VONTs serves to enhance the C 2 H 5 OH oxidation due to a higher oxygen ion-chemisorption on the conductive Ag nanoparticle surfaces.

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Metal cations doped vanadium oxide nanotubes: Synthesis, electronic structure, and gas sensing properties

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2017.10.042 ◽

2018 ◽

Vol 256 ◽

pp. 1021-1029 ◽

Cited By ~ 10

Author(s):

Galina S. Zakharova ◽

Yueli Liu ◽

Andrey N. Enyashin ◽

Xue Yang ◽

Jing Zhou ◽

...

Keyword(s):

Electronic Structure ◽

Vanadium Oxide ◽

Gas Sensing ◽

Metal Cations ◽

Sensing Properties ◽

Gas Sensing Properties ◽

Vanadium Oxide Nanotubes

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Gas sensing properties of p-type semiconducting vanadium oxide nanotubes

Applied Surface Science ◽

10.1016/j.apsusc.2012.05.120 ◽

2012 ◽

Vol 258 (24) ◽

pp. 9554-9558 ◽

Cited By ~ 54

Author(s):

Minglang Yu ◽

Xueqin Liu ◽

Yuan Wang ◽

Youbin Zheng ◽

Jiawang Zhang ◽

...

Keyword(s):

Vanadium Oxide ◽

Gas Sensing ◽

Sensing Properties ◽

Gas Sensing Properties ◽

P Type ◽

Vanadium Oxide Nanotubes

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Ag Nanoparticle Functionalized TiO2 Nanowire Thin Film and its Gas-Sensing Application at Room Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.1822 ◽

2013 ◽

Vol 275-277 ◽

pp. 1822-1825

Author(s):

Huan Di Huang ◽

Hui Juan Zhu ◽

Liang Shu Jiang ◽

Huan Yu Zhao

Keyword(s):

Thin Film ◽

Ag Nanoparticles ◽

Room Temperature ◽

Distribution Density ◽

Gas Sensing ◽

Ag Nanoparticle ◽

Sensing Properties ◽

Tio2 Nanowire ◽

Gas Sensing Properties ◽

Sensing Application

Ag nanoparticle functionalized TiO2nanowire (TiO2NW @ Ag NP) was synthesized and the gas sensing properties of the nanowire film was investigated. The size and the distribution density of Ag nanoparticles can be easily controlled. The sensor based on Ag nanoparticle functionalized TiO2 nanowire thin film has promising sensing properties, and at room temperature, its sensitivity towards H2and O2can reach 500 ppm and 1000 ppm respectively.

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V2O5 Nanotubes Novel Gas Sensor with High Sensitivity for Ethanol

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.421-422.328 ◽

2009 ◽

Vol 421-422 ◽

pp. 328-331 ◽

Cited By ~ 1

Author(s):

Wei Jin ◽

Wen Chen ◽

Bai Tao Dong ◽

Chun Xia Zhao ◽

Li Qiang Mai ◽

...

Keyword(s):

Vanadium Oxide ◽

Gas Sensor ◽

Gas Sensors ◽

Gas Sensing ◽

Hydrothermal Reaction ◽

High Sensitivity ◽

Average Diameter ◽

Self Assembling ◽

Gas Sensing Properties ◽

Vanadium Oxide Nanotubes

Vanadium oxide nanotubes were synthesized via a rheological self-assembling process followed by a hydrothermal reaction. V2O5 gas sensors were fabricated from vanadium oxide nanotubess with an average diameter of around 90 nm and their gas-sensing properties were investigated. It was found that the sensors based on vanadium oxide nanotubes exhibit high responses ethanol gas at 270°C. The results indicate that vanadium oxide nanotube sensors will be promising candidates for practical detectors for ethanol.

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Synthesis of Novel Vanadium Oxide Nanotubes and Nanofibers

MRS Proceedings ◽

10.1557/proc-740-i10.9 ◽

2002 ◽

Vol 740 ◽

Cited By ~ 2

Author(s):

Samuel T. Lutta ◽

Hong Dong ◽

Peter Y. Zavalij ◽

M. Stanley Whittingham

Keyword(s):

Thermal Analysis ◽

Vanadium Oxide ◽

Electrochemical Behavior ◽

Redox Reactions ◽

Sol Gel ◽

Vanadium Oxides ◽

Organic Polymer ◽

Fibrous Morphology ◽

Surfactant Templates ◽

Vanadium Oxide Nanotubes

ABSTRACTWe are exploring the synthesis and properties of structured vanadium oxides mainly nanotubes and nanorods. Nanotubes initially formed with surfactant templates have been readily exchanged with simple cations without change of the basal-plane structure. These compounds contain d-like vanadium oxide layers with the vanadium in VO6 octahedra. This structure is particularly suitable for redox reactions. In this paper we report on synthesis of vanadium oxide, (NH4)xV2O5-d·nH2O rods using organic polymer as template. This compound has been synthesized by sol-gel reaction and subsequent hydrothermal treatment. TGA, SEM, XRD and FTIR were used to characterize this compound. Thermal analysis of this compound shows that the fibrous morphology is maintained when it is heated in nitrogen and oxygen above 300 °C. However, in both cases the size of the fibers decreases. Performance of this compound as cathode material in secondary electrolyte has been investigated using LiPF6 as electrolyte. A capacity of 140 mAh/g was obtained which remained fairly constant with up to at least 10 cycles. We also investigated electrochemical behavior of thermal products.

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Structural, optical, and electronic properties of vanadium oxide nanotubes

Physical Review B ◽

10.1103/physrevb.72.115407 ◽

2005 ◽

Vol 72 (11) ◽

Cited By ~ 30

Author(s):

X. Liu ◽

C. Täschner ◽

A. Leonhardt ◽

M. H. Rümmeli ◽

T. Pichler ◽

...

Keyword(s):

Vanadium Oxide ◽

Electronic Properties ◽

Optical And Electronic Properties ◽

Vanadium Oxide Nanotubes

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Experimental and theoretical study of the characteristics of LSPR peaks for metal NPs produced by controlling Ar ambient gas pressure to enhance the efficiency of solar cells

Canadian Journal of Physics ◽

10.1139/cjp-2020-0626 ◽

2021 ◽

pp. 1-6

Author(s):

Serap Yiğit Gezgin ◽

Abdullah Kepceoğlu ◽

Hamdi Şükür Kiliç

Keyword(s):

Metal Nanoparticles ◽

Ag Nanoparticles ◽

Solar Spectrum ◽

Wavelength Region ◽

Gas Pressure ◽

Metal Nanoparticle ◽

Ag Nanoparticle ◽

Extinction Cross Section ◽

Ambient Gas ◽

Ar Gas

In this study, silver (Ag) nanoparticle thin films were deposited on microscope slide glass and Si wafer substrates using the pulsed-laser deposition (PLD) technique in Ar ambient gas pressures of 1 × 10−3 and 7.5 × 10−1 mbar. AFM analysis has shown that the number of Ag nanoparticles reaching the substrate decreased with increasing Ar gas pressure. As a result of Ar ambient gas being allowed into the vacuum chamber, it was observed that the size and height of Ag nanoparticles decreased and the interparticle distances decreased. According to the absorption spectra taken by a UV–vis spectrometer, the wavelength where the localised surface plasmon resonance (LSPR) peak appeared was shifted towards the longer wavelength region in the solar spectrum as Ar background gas pressure was decreased. This experiment shows that LSPR wavelength can be tuned by adjusting the size of metal nanoparticles, which can be controlled by changing Ar gas pressure. The obtained extinction cross section spectra for Ag nanoparticle thin film was theoretically analysed and determined by using the metal nanoparticle–boundary element method (MNPBEM) toolbox simulation program. In this study, experimental spectrum and simulation data for metal nanoparticles were acquired, compared, and determined to be in agreement.

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