Nano- and micro-structural control of WO3 photoelectrode films through aqueous synthesis of WO3·H2O and (NH4)0.33WO3 precursors

Uchiyama, Hironobu; Nagayasu, Yuki

doi:10.1039/d0ra01321h

Cited by 3 publications

(1 citation statement)

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“…WO 3 possesses complex crystal phases: monoclinic, orthorhombic, and tetragonal phases, each of which has specific physical and chemical properties. − Therefore, WO 3 is used as a good research object to discuss the influence of crystal phase on the gas sensing performance. Further research is needed to obtain gas-sensitive materials with favorite performances.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Yang

Cao

et al. 2022

ACS Appl. Nano Mater.

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The pursuit of high performance is the eternal theme in gas sensor research. Because of the complexity of the response and recovery processes, the selective detection, high response, rapid response, and recovery remain challenging in the atmospheric environment. In this paper, WO3 hierarchical spheres (WO3 HS) with different crystalline phase ratios are successfully synthesized to evaluate the relationship between the phase structure and gas-sensitive properties. The as-prepared WO3-2 HS samples achieve superior gas sensing characteristics including high response (S = 24.2) and fast response and recovery speed (1 and 19 s) to 100 ppm acetone at 300 °C. The superior acetone sensing performance probably originates from the regulation of the phase ratios of nanosheet-based WO3. With the decrease of orthorhombic phase and the increase of monoclinic phase, the specificity detection to acetone is increased significantly. The reasons for such a huge selectivity change are discussed in detail. From the perspective of reaction kinetics, we also compare the contributions of specific surface area and crystalline phase impacting the gas sensing performance.

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Section: Introductionmentioning

confidence: 99%

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Yang

Cao

et al. 2022

ACS Appl. Nano Mater.

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Co3O4/CeO2 p-n heterojunction construction and application for efficient photocatalytic hydrogen evolution

Liu

Wang

et al. 2021

International Journal of Hydrogen Energy

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WO3 nanostructures produced from tungsten welding electrode scraps: Temperature influence on optical and morphological characteristics

Leite,

Lacerda,

Marciniuk

et al. 2024

Materials Chemistry and Physics

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Nano- and micro-structural control of WO₃ photoelectrode films through aqueous synthesis of WO₃·H₂O and (NH₄)_0.33WO₃ precursors

Abstract: Nano- and micro-structured WO3 films obtained from WO3·H2O and (NH4)0.33WO3 precursors prepared by an aqueous route showed a good photoanodic performance depending on their morphologies.

Cited by 3 publications

References 26 publications

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Co3O4/CeO2 p-n heterojunction construction and application for efficient photocatalytic hydrogen evolution

WO3 nanostructures produced from tungsten welding electrode scraps: Temperature influence on optical and morphological characteristics

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Nano- and micro-structural control of WO3 photoelectrode films through aqueous synthesis of WO3·H2O and (NH4)0.33WO3 precursors

Abstract: Nano- and micro-structured WO3 films obtained from WO3·H2O and (NH4)0.33WO3 precursors prepared by an aqueous route showed a good photoanodic performance depending on their morphologies.

Cited by 3 publications

References 26 publications

Controlling the Crystal Phase Structure of WO3 Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Controlling the Crystal Phase Structure of WO3 Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Co3O4/CeO2 p-n heterojunction construction and application for efficient photocatalytic hydrogen evolution

WO3 nanostructures produced from tungsten welding electrode scraps: Temperature influence on optical and morphological characteristics

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Product

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Nano- and micro-structural control of WO₃ photoelectrode films through aqueous synthesis of WO₃·H₂O and (NH₄)_0.33WO₃ precursors

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance