Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Three-Dimensional Assemblies of Edge-Enriched WSe2 Nanoflowers for Selectively Detecting Ammonia or Nitrogen Dioxide

  • Identification data

    Identifier: imarina:9287301
    Authors:
    Alagh, AanchalAnnanouch, Fatima EzahraSierra-Castillo, AyrtonHaye, EmileColomer, Jean-FrancoisLlobet, Eduard
    Abstract:
    Herein, we present, for the first time, a chemoresistive-type gas sensor composed of two-dimensional WSe2, fabricated by a simple selenization of tungsten trioxide (WO3) nanowires at atmospheric pressure. The morphological, structural, and chemical composition investigation shows the growth of vertically oriented three-dimensional (3D) assemblies of edge-enriched WSe2 nanoplatelets arrayed in a nanoflower shape. The gas sensing properties of flowered nanoplatelets (2H-WSe2) are investigated thoroughly toward specific gases (NH3 and NO2) at different operating temperatures. The integration of 3D WSe2 with unique structural arrangements resulted in exceptional gas sensing characteristics with dual selectivity toward NH3 and NO2 gases. Selectivity can be tuned by selecting its operating temperature (150 °C for NH3 and 100 °C for NO2). For instance, the sensor has shown stable and reproducible responses (24.5%) toward 40 ppm NH3 vapor detection with an experimental LoD < 2 ppm at moderate temperatures. The gas detecting capabilities for CO, H2, C6H6, and NO2 were also investigated to better comprehend the selectivity of the nanoflower sensor. Sensors showed repeatable responses with high sensitivity to NO2 molecules at a substantially lower operating temperature (100 °C) (even at room temperature) and LoD < 0.1 ppm. However, the gas sensing properties reveal high selectivity toward NH3 gas at moderate operating temperatures. Moreover, the sensor demonstrated high resilience against ambient humidity (Rh = 50%), demonstrating its remarkable stability toward NH3 gas detection. Considering the detection of NO2 in a humid ambient atmosphere, there was a modest increase in the sensor response (5.5%). Furthermore, four-month long-term stability assessments were also taken toward N
  • Others:

    Author, as appears in the article.: Alagh, Aanchal; Annanouch, Fatima Ezahra; Sierra-Castillo, Ayrton; Haye, Emile; Colomer, Jean-Francois; Llobet, Eduard
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Alagh, Aanchal / Annanouch, Fatima Ezahra / Llobet Valero, Eduard
    Keywords: Tungsten diselenide Transition metal dichalcogenide Nitrogen dioxide Gas sensors Gas sensor Chemical vapor deposition Ammonia tungsten diselenide transition metal dichalcogenide temperature performance no2 nitrogen dioxide nanostructures nanoparticles mos2 humidity growth exposure chemical vapor deposition ammonia
    Abstract: Herein, we present, for the first time, a chemoresistive-type gas sensor composed of two-dimensional WSe2, fabricated by a simple selenization of tungsten trioxide (WO3) nanowires at atmospheric pressure. The morphological, structural, and chemical composition investigation shows the growth of vertically oriented three-dimensional (3D) assemblies of edge-enriched WSe2 nanoplatelets arrayed in a nanoflower shape. The gas sensing properties of flowered nanoplatelets (2H-WSe2) are investigated thoroughly toward specific gases (NH3 and NO2) at different operating temperatures. The integration of 3D WSe2 with unique structural arrangements resulted in exceptional gas sensing characteristics with dual selectivity toward NH3 and NO2 gases. Selectivity can be tuned by selecting its operating temperature (150 °C for NH3 and 100 °C for NO2). For instance, the sensor has shown stable and reproducible responses (24.5%) toward 40 ppm NH3 vapor detection with an experimental LoD < 2 ppm at moderate temperatures. The gas detecting capabilities for CO, H2, C6H6, and NO2 were also investigated to better comprehend the selectivity of the nanoflower sensor. Sensors showed repeatable responses with high sensitivity to NO2 molecules at a substantially lower operating temperature (100 °C) (even at room temperature) and LoD < 0.1 ppm. However, the gas sensing properties reveal high selectivity toward NH3 gas at moderate operating temperatures. Moreover, the sensor demonstrated high resilience against ambient humidity (Rh = 50%), demonstrating its remarkable stability toward NH3 gas detection. Considering the detection of NO2 in a humid ambient atmosphere, there was a modest increase in the sensor response (5.5%). Furthermore, four-month long-term stability assessments were also taken toward NH3 gas detection, and sensors showed excellent response stability. Therefore, this study highlights the practical application of the 2H variant of WSe2 nanoflower gas sensors for NH3 vapor detection.
    Thematic Areas: Química Nanoscience and nanotechnology Nanoscience & nanotechnology Medicine (miscellaneous) Medicina veterinaria Medicina ii Medicina i Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Interdisciplinar General materials science Farmacia Engenharias iv Engenharias iii Engenharias ii Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Biotecnología Biodiversidade Astronomia / física Arquitetura, urbanismo e design
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: fatimaezahra.annanouch@urv.cat aanchal.alagh@estudiants.urv.cat aanchal.alagh@estudiants.urv.cat eduard.llobet@urv.cat
    Author identifier: 0000-0003-1533-6482 0000-0003-2466-8219 0000-0003-2466-8219 0000-0001-6164-4342
    Record's date: 2024-09-07
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://pubs.acs.org/doi/10.1021/acsami.2c16299
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Acs Applied Materials & Interfaces. 14 (49): 54946-54960
    APA: Alagh, Aanchal; Annanouch, Fatima Ezahra; Sierra-Castillo, Ayrton; Haye, Emile; Colomer, Jean-Francois; Llobet, Eduard (2022). Three-Dimensional Assemblies of Edge-Enriched WSe2 Nanoflowers for Selectively Detecting Ammonia or Nitrogen Dioxide. Acs Applied Materials & Interfaces, 14(49), 54946-54960. DOI: 10.1021/acsami.2c16299
    Article's DOI: 10.1021/acsami.2c16299
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2022
    Publication Type: Journal Publications
  • Keywords:

    Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Medicine (Miscellaneous),Nanoscience & Nanotechnology,Nanoscience and Nanotechnology
    Tungsten diselenide
    Transition metal dichalcogenide
    Nitrogen dioxide
    Gas sensors
    Gas sensor
    Chemical vapor deposition
    Ammonia
    tungsten diselenide
    transition metal dichalcogenide
    temperature
    performance
    no2
    nitrogen dioxide
    nanostructures
    nanoparticles
    mos2
    humidity
    growth
    exposure
    chemical vapor deposition
    ammonia
    Química
    Nanoscience and nanotechnology
    Nanoscience & nanotechnology
    Medicine (miscellaneous)
    Medicina veterinaria
    Medicina ii
    Medicina i
    Materials science, multidisciplinary
    Materials science (miscellaneous)
    Materials science (all)
    Materiais
    Interdisciplinar
    General materials science
    Farmacia
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Economia
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Biotecnología
    Biodiversidade
    Astronomia / física
    Arquitetura, urbanismo e design
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