Perovskite hexagonal YMnO3 nanopowder as p-type semiconductor gas sensor for H2S detection

Balamurugan, C.; Lee, D.-W.

doi:10.1016/j.snb.2015.07.018

Cited by 75 publications

(32 citation statements)

References 65 publications

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“…6 and Supplementary Note 3). Our calculated energy barrier is lower than the reported activation energy of 0.38–0.50 eV for polaron hopping in YMnO 3 (refs 22, 23, 24). …”

Section: Resultscontrasting

confidence: 76%

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

et al. 2016

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Hexagonal manganites, h-RMnO3 (R=Sc, Y, Ho–Lu), have been intensively studied for their multiferroic properties, magnetoelectric coupling, topological defects and electrically conducting domain walls. Although point defects strongly affect the conductivity of transition metal oxides, the defect chemistry of h-RMnO3 has received little attention. We use a combination of experiments and first principles electronic structure calculations to elucidate the effect of interstitial oxygen anions, Oi, on the electrical and structural properties of h-YMnO3. Enthalpy stabilized interstitial oxygen anions are shown to be the main source of p-type electronic conductivity, without reducing the spontaneous ferroelectric polarization. A low energy barrier interstitialcy mechanism is inferred from Density Functional Theory calculations to be the microscopic migration path of Oi. Since the Oi content governs the concentration of charge carrier holes, controlling the thermal and atmospheric history provides a simple and fully reversible way of tuning the electrical properties of h-RMnO3.

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“…6 and Supplementary Note 3). Our calculated energy barrier is lower than the reported activation energy of 0.38–0.50 eV for polaron hopping in YMnO 3 (refs 22, 23, 24). …”

Section: Resultscontrasting

confidence: 76%

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

et al. 2016

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“…In the provskite-type oxides, A is (lanthanides, alkali metals and earth alkali metals) and B is (transition metals) where thermal resistance is controlled by A cations and catalytic activity is controlled with B redox cations 1 . However, many researchers have doped transition metals in A-site; and lanthanides, alkali metals and alkali earth metals in B-site [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Lanio3 Perovskite-Type Nanocatalyst with Zr for Carbon Dioxide Reforming of Methane

Talaie¹,

Sadr²,

Aghabozorg³

et al. 2016

Orient. J. Chem

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La 1-x Zr x NiO 3 perovskite nanocatalysts were synthesized by citrate sol-gel method. The synthesized samples were characterized by using X-ray diffraction (XRD), temperature programmed reduction (TPR), and inductively coupled plasma (ICP) techniques. Surface areas of the compounds were measured by BET method. Morphology study of the nanocatalysts was performed using scanning electron microscopy. The XRD patterns confirmed a well-crystallized structure in doping level up to 0.2 for La 1-x Zr x NiO 3 . The SEM images showed that the synthesized particles were in nanoscale. The TPR analysis revealed that by increasing the amount of Zr in the prepared samples, reduction process became difficult. The catalytic activity of the nanocatalysts was studied in dry reforming of methane (DRM) with CO 2 and the H 2 /CO ratio~1 when doping level was 0.1.

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“…Besides iron-containing nanomaterials, many other metal oxides have been investigated for developing hydrogen sulfide chemo-resistors. These include WO 3 [ 22 , 23 , 24 , 25 ], ZnO [ 26 , 27 , 28 ], In 2 O 3 [ 29 ], CeO 2 [ 30 ], and YMnO 3 [ 31 ]. Pure tungsten oxide shows a response to hydrogen sulfide (R air /R gas = 5 at 225 °C for 20 ppm H 2 S) but also very high cross-sensitivity to ammonia [ 32 ] (R air /R gas = 3.5 at 300 °C for 100 ppm NH 3 ) and to nitrogen dioxide [ 22 ] (given the oxidizing nature of nitrogen dioxide, the sensor resistance increases when exposed to this species; R gas /R air = 8 at 225 °C for 1 ppm NO 2 ).…”

Section: Metal Oxide Nanomaterialsmentioning

confidence: 99%

Nanomaterials for the Selective Detection of Hydrogen Sulfide in Air

Llobet

Brunet

Pauly

et al. 2017

Sensors

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This paper presents a focused review on the nanomaterials and associated transduction schemes that have been developed for the selective detection of hydrogen sulfide. It presents a quite comprehensive overview of the latest developments, briefly discusses the hydrogen sulfide detection mechanisms, identifying the reasons for the selectivity (or lack of) observed experimentally. It critically reviews performance, shortcomings, and identifies missing or overlooked important aspects. It identifies the most mature/promising materials and approaches for achieving inexpensive hydrogen sulfide sensors that could be employed in widespread, miniaturized, and inexpensive detectors and, suggests what research should be undertaken for ensuring that requirements are met.

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Perovskite hexagonal YMnO3 nanopowder as p-type semiconductor gas sensor for H2S detection

Cited by 75 publications

References 65 publications

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

Synthesis and Application of Lanio3 Perovskite-Type Nanocatalyst with Zr for Carbon Dioxide Reforming of Methane

Nanomaterials for the Selective Detection of Hydrogen Sulfide in Air

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