Bi2O3 as a selective sensing material for NO detection

Cabot, Andreu; Marsal, Agustı́; Arbiol, Jordi; Morante, J.R.

doi:10.1016/j.snb.2003.10.032

Cited by 214 publications

(118 citation statements)

References 91 publications

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“…As the background zero-grade air was replaced with N 2 gas, the increase in the sensor resistance, as exposed to NO, was simply caused by the NO adsorption in the charged form (NO ads − ) [23],as described by Eq. (9).…”

Section: O 2adsmentioning

confidence: 99%

Fabrication of NOx gas sensors using In2O3–ZnO composite films

Lin

Fang

Lin

et al. 2010

Sensors and Actuators B: Chemical

114

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Section: O 2adsmentioning

confidence: 99%

Fabrication of NOx gas sensors using In2O3–ZnO composite films

Lin

Fang

Lin

et al. 2010

Sensors and Actuators B: Chemical

114

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“…In particular, works related to bismuth oxide (Bi 2 O 3 ) have doubled in the last decade, thus reflecting the scientific, technological, and industrial importance of this compound. Its peculiar properties, including a large energy gap, a high refractive index and dielectric permittivity, and good photoconductivity [1][2][3][4][5][6], have made Bi 2 O 3 suitable for a large range of applications, such as optical coatings, photovoltaic cells, microwave integrated circuits, fuel cells, oxygen sensors, oxygen pumps, and catalytic activity [3,[7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

β−Bi2O3under compression: Optical and elastic properties and electron density topology analysis

et al. 2016

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We report a joint experimental and theoretical study of the optical properties of tetragonal bismuth oxide (β-Bi 2 O 3 ) at high pressure by means of optical absorption measurements combined with ab initio electronic band structure calculations. Our results are consistent with previous results that show the presence of a second-order isostructural phase transition in Bi 2 O 3 (from β to β ) around 2 GPa and a phase transition above 15 GPa combined with a pressure-induced amorphization above 17-20 GPa. In order to further understand the pressure-induced phase transitions and amorphization occurring in β-Bi 2 O 3 , we theoretically studied the mechanical and dynamical stability of the tetragonal structures of β-and β -Bi 2 O 3 at high pressure through calculations of their elastic constants, elastic stiffness coefficients, and phonon dispersion curves. The pressure dependence of the elastic stiffness coefficients and phonon dispersion curves confirms that the isostructural phase transition near 2 GPa is of ferroelastic nature. Furthermore, a topological study of the electron density shows that the ferroelastic transition is not caused by a change in number of critical points (cusp catastrophe), but by the equalization of the electron densities of both independent O atoms in the unit cell due to a local rise in symmetry. Finally, from theoretical simulations, β -Bi 2 O 3 is found to be mechanically and dynamically stable at least up to 26.7 GPa under hydrostatic conditions; thus, the pressure-induced amorphization reported above 17-20 GPa in powder β -Bi 2 O 3 using methanol-ethanol-water as pressure-transmitting medium could be related to the frustration of a reconstructive phase transition at room temperature and the presence of mechanical or dynamical instabilities under nonhydrostatic conditions.

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“…Bismuth trioxide (Bi 2 O 3 ) is a semiconductor with interesting physical properties, such as a wide optical band-gap, high refractive index and dielectric permittivity, good photoconductive response, and ionic conductivity, which make this material suitable for applications in solid oxide fuel cells, gas sensing, optical coatings, catalysis, and optoelectronics. [1][2][3] phase is one of the best oxygen ion conductors known (r $ 1.5 S cm À1 ) and is considered as a reference material within the field of solid electrolytes. 6 This phase can be stabilized by addition of rare earth oxides, but the conductivity drops by about two orders of magnitude.…”

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confidence: 99%