Investigation, for NH3 gas sensing applications, of the Nb2O5 semiconducting oxide in the presence of interferent species such as oxygen and humidity1This paper is dedicated to the memory of Miss Christine Maleysson who died tragically on August 20th, 1997.1

Chambon, Lucille; Maleysson, C.; Pauly, Alain; Germain, J.P.; Demarne, V.; Grisel, A.

doi:10.1016/s0925-4005(97)00281-5

Cited by 33 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of niobium pentoxide (Nb 2 O 5 ), which can be produced via different methods, such as reactive sputtering [12], sol-gel processes [13], templating techniques [14] and anodic oxidation [15,16], has been reported in applications for gas sensors [17], catalysts [18], both optical and electrochromic devices [12], solid state electrochemical devices [19] and biocompatible prostheses [13]. There are studies on the formation of a nanoporous layer of Nb 2 O 5 by controlling the effects of mixed electrolytes, applied potential and anodization time.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Minagar

Berndt

Wen

2015

JFB

View full text Add to dashboard Cite

Valve metals such as titanium (Ti), zirconium (Zr), niobium (Nb) and tantalum (Ta) that confer a stable oxide layer on their surfaces are commonly used as implant materials or alloying elements for titanium-based implants, due to their exceptional high corrosion resistance and excellent biocompatibility. The aim of this study was to investigate the bioactivity of the nanostructures of tantala (Ta2O5), niobia (Nb2O5), zirconia (ZrO2) and titania (TiO2) in accordance to their roughness and wettability. Therefore, four kinds of metal oxide nanoporous and nanotubular Ta2O5, Nb2O5, ZrO2 and TiO2 were fabricated via anodization. The nanosize distribution, morphology and the physical and chemical properties of the nanolayers and their surface energies and bioactivities were investigated using SEM-EDS, X-ray diffraction (XRD) analysis and 3D profilometer. It was found that the nanoporous Ta2O5 exhibited an irregular porous structure, high roughness and high surface energy as compared to bare tantalum metal; and exhibited the most superior bioactivity after annealing among the four kinds of nanoporous structures. The nanoporous Nb2O5 showed a uniform porous structure and low roughness, but no bioactivity before annealing. Overall, the nanoporous and nanotubular layers of Ta2O5, Nb2O5, ZrO2 and TiO2 demonstrated promising potential for enhanced bioactivity to improve their biomedical application alone or to improve the usage in other biocompatible metal implants.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Minagar

Berndt

Wen

2015

JFB

View full text Add to dashboard Cite

show abstract

“…On the other hand, gas sensors based on metal oxides have been investigated for many years and present these advantages. Regarding NH gas detection, some materials have been proposed, such as SnO [4], TiO [5], Nb O [6] or MoO [7]. However, WO has been recently reported as one of the most promising materials for this purpose and some works concerning its sensor response to ammonia-gas [8], interference from NO [1] or influence of some other oxides introduced as additives [9] have been published.…”

Section: Introductionmentioning

confidence: 99%

Gas-sensing properties of catalytically modified WO/sub 3/ with copper and vanadium for NH/sub 3/ detection

et al. 2005

View full text Add to dashboard Cite

Ammonia gas detection by pure and catalytically modified WO 3 -based gas sensors was analyzed. Sensor response of pure tungsten oxide to NH 3 was unsatisfactory, probably due to the unselective oxidation of ammonia into NO . Copper and vanadium were introduced in different concentrations and the resulting material was annealed at different temperatures in order to improve the sensing properties for NH 3 detection. The introduction of Cu and V as catalytic additives improved the sensor response to NH 3 . Possible reaction mechanisms of NH 3 over these materials are discussed. Sensor responses to other gases like NO 2 or CO and interference of humidity on ammonia detection were also analyzed so as to choose the best sensing element.

show abstract

“…In comparison with currently widely investigated energy materials (e.g., TiO 2 ), niobium oxides including NbO, NbO 2 , Nb 2 O 3 , Nb 2 O 5 and Nb 3 O 7 X (X=OH, F) have exhibited competitive performance in catalysis, photocatalysis, lithium-ion battery, sensing, and solar cells. [14][15][16][17][18][19][20][21] Studies demonstrated that monoclinic Nb 2 O 5 is a promising energy material for improving the opencircuit voltage of dye-sensitized solar cells (DSSCs) owing to its more negative conduction band edge position compared to TiO 2 and high performance lithium-ion batteries (LiBs) due to its large lithium ion insertion number of 2.5 (x = 2.5 for Li x Nb 2 O 5 ). 17,22 However, the reported Nb 2 O 5 nanostructures (e.g., nanoparticles, nanobelts) obtained by traditional sol-gel and electrospinning methods (need high temperature calcination at 1000 º C) usually possess low surface area, resulting in unsatisfactory application performance.…”

mentioning

confidence: 99%

Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb₃O₇(OH) and Nb₂O₅ Superstructures for Energy Storage and Conversion Applications

et al. 2015

View full text Add to dashboard Cite

Three-dimensional (3D) metal oxide superstructures have demonstrated great potentials for structure-dependent energy storage and conversion applications. Here, we reported a facile hydrothermal method for direct growth of highly ordered single crystalline nanowire array assembled 3D orthorhombic Nb3O7(OH) superstructures and their subsequent thermal transformation into monoclinic Nb2O5 with well preserved 3D nanowire superstructures. The performance of resultant 3D Nb3O7(OH) and Nb2O5 superstructures differed remarkably when used for energy conversion and storage applications. The thermally converted Nb2O5 superstructures as anode material of lithium-ion batteries (LiBs) showed higher capacity and excellent cycling stability compared to the Nb3O7(OH) superstructures, while directly hydrothermal grown Nb3O7(OH) nanowire superstructure film on FTO substrate as photoanode of dye-sensitized solar cells (DSSCs) without the need for further calcination exhibited an overall light conversion efficiency of 6.38%, higher than that (5.87%) of DSSCs made from the thermally converted Nb2O5 film. The high energy application performance of the niobium-based nanowire superstructures with different chemical compositions can be attributed to their large surface area, superior electron transport property, and high light utilization efficiency resulting from a 3D superstructure, high crystallinity, and large sizes. The formation process of 3D nanowire superstructures before and after thermal treatment was investigated and discussed based on our theoretical and experimental results.

show abstract

Investigation, for NH3 gas sensing applications, of the Nb2O5 semiconducting oxide in the presence of interferent species such as oxygen and humidity1This paper is dedicated to the memory of Miss Christine Maleysson who died tragically on August 20th, 1997.1

Cited by 33 publications

References 14 publications

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Gas-sensing properties of catalytically modified WO/sub 3/ with copper and vanadium for NH/sub 3/ detection

Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb₃O₇(OH) and Nb₂O₅ Superstructures for Energy Storage and Conversion Applications

Contact Info

Product

Resources

About

Investigation, for NH3 gas sensing applications, of the Nb2O5 semiconducting oxide in the presence of interferent species such as oxygen and humidity1This paper is dedicated to the memory of Miss Christine Maleysson who died tragically on August 20th, 1997.1

Cited by 33 publications

References 14 publications

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Fabrication and Characterization of Nanoporous Niobia, and Nanotubular Tantala, Titania and Zirconia via Anodization

Gas-sensing properties of catalytically modified WO/sub 3/ with copper and vanadium for NH/sub 3/ detection

Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb3O7(OH) and Nb2O5 Superstructures for Energy Storage and Conversion Applications

Contact Info

Product

Resources

About

Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb₃O₇(OH) and Nb₂O₅ Superstructures for Energy Storage and Conversion Applications