Role of Cu in the enhancement of NH3 sensing performance of spray pyrolyzed WO3 nanostructures

Anusha,; Antony, Albin; Ani, Aninamol; Poornesh, P.; Kulkarni, Suresh D.

doi:10.1016/j.mssp.2021.105967

Cited by 12 publications

(2 citation statements)

References 64 publications

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“…83 The fabrication process was not accompanied by annealing treatment of the resulting WO 3 film, however monoclinic structure with a fairly stable crystal phase could be formed. The recent study of Cu doped WO 3 film synthesized through the FSP technique with a substrate temperature of 400 o C shows a response of 1.58 to 5 ppm to NH3 at an operating temperature of 250 o C. 84 Chemical bath deposition.-Another wet method that can be used in fabricating the WO 3 film is chemical bath deposition. this method is based on the immersion of a particular substrate into the precursor solution.…”

Section: Methods Benefits Drawbacksmentioning

confidence: 99%

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Bonardo¹,

Septiani²,

Amri³

et al. 2021

J. Electrochem. Soc.

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WO 3 -based gas sensors have attracted the attention of researchers around the world in creating and developing sensors that are sensitive, stable, and have excellent reproducibility against harmful gases. Various studies that have been performed since the last few years exhibited the superior potential of WO 3 in carrying out optimal chemisorption of oxidizing and reducing gas molecules. The additional materials such as metal, metal oxide, and carbon nanomaterial can significantly widen the active state area of the WO 3 surface and other facts in various studies illustrate that the addition of polymers will change the characteristics of the semiconductor sensor. This review provides a comprehensive review of the development and modification of WO 3 for enhancing toxic gas sensor performances. In addition, the discussion of the sensing mechanism, future opportunities as well as challenges will be addressed thereby can inspire research progress on WO 3 -based toxic gas detection sensors.

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Section: Methods Benefits Drawbacksmentioning

confidence: 99%

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Bonardo¹,

Septiani²,

Amri³

et al. 2021

J. Electrochem. Soc.

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“…Modification of gas-sensitive materials is the first choice to achieve room-temperature response. − In previous work, it has been shown that the properties of the materials can be significantly improved by adjusting the microstructure, − doping precious metal particles, − forming composite structures, constructing heterojunctions, and adding special functional groups . The three-dimensional structure of the hollow and the design of the rough and porous surface can provide more contact area and reactive sites, helping to adsorb more target gas .…”

Section: Introductionmentioning

confidence: 99%

Nanofiber-Structured SnO₂/Co₃O₄ Modified Ta₂O₅ Heterojunction for Room-Temperature Ethanol Sensing

Hu,

Shao,

Chen

et al. 2024

ACS Appl. Nano Mater.

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Ternary metal oxide SnO 2 /Co 3 O 4 has attracted much attention for its excellent sensitivity and structural stability. We prepared hollow, rough, and porous SnO 2 /Co 3 O 4 nanofibers using the electrostatic spinning technique in this study. These nanofibers were subsequently compounded with Ta 2 O 5 via the solvothermal method, resulting in the successful synthesis of nanofiber-structured Ta 2 O 5 @SnO 2 /Co 3 O 4 heterojunction materials with outstanding room-temperature ethanol sensing performance. The nanofiber structure of SnO 2 /Co 3 O 4 significantly enhanced the interface for active oxygen adsorption on the Ta 2 O 5 surface, thereby increasing the number of reactive sites for ethanol gas sensitivity. The Ta 2 O 5 @SnO 2 /Co 3 O 4 heterojunction can detect ethanol concentrations as low as 1 ppm at room temperature, with a response value of 6.53 for 100 ppm ethanol. The theoretical detection limit of ethanol for this material can be as low as 522 ppb, as determined by curve fitting. Nanofiber-structured Ta 2 O 5 @SnO 2 /Co 3 O 4 heterojunction materials exhibited comprehensive and excellent room-temperature gas-sensitive properties, suggesting that combining the morphology regulation and heterostructure can provide innovative strategies for room-temperature sensing.

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Ultraefficient Ammonia Gas Sensors Based on Pt‐Loaded WO₃ Nanobars

Wiboon,

Leangtanom,

Jaruwongrungsee

et al. 2024

Physica Status Solidi (a)

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Herein, unloaded WO3 (WO3) and Pt‐loaded WO3 (Pt‐WO3) nanobars are successfully synthesized through simple hydrothermal and impregnation methods. X‐ray diffractometer analysis confirms the formation of a monoclinic WO3 structure. Surface analysis reveals that the Pt impregnation results in a significant increase in the specific surface area of WO3 nanobars. The gas‐sensing performance of sensors based on nanobars is measured toward ammonia (NH3) with varying NH3 concentrations at different operating temperatures. Compared with the pristine WO3 sensor, the Pt‐WO3‐based sensor with an optimal Pt content of 1 wt% exhibits a relatively low optimum operating temperature of 250 °C and a superior response of 960–50 ppm NH3. Furthermore, the Pt‐WO3‐based sensor also displays fast response, excellent NH3 selectivity to ammonia, moderate humidity dependence, and good stability. Therefore, the developed hydrothermal and impregnation methods could be a suitable alternative procedure for the synthesis of Pt‐WO3 nanobars useful for advanced NH3‐sensing applications.

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Role of Cu in the enhancement of NH3 sensing performance of spray pyrolyzed WO3 nanostructures

Cited by 12 publications

References 64 publications

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Nanofiber-Structured SnO₂/Co₃O₄ Modified Ta₂O₅ Heterojunction for Room-Temperature Ethanol Sensing

Ultraefficient Ammonia Gas Sensors Based on Pt‐Loaded WO₃ Nanobars

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Role of Cu in the enhancement of NH3 sensing performance of spray pyrolyzed WO3 nanostructures

Cited by 12 publications

References 64 publications

Review—Recent Development of WO3 for Toxic Gas Sensors Applications

Review—Recent Development of WO3 for Toxic Gas Sensors Applications

Nanofiber-Structured SnO2/Co3O4 Modified Ta2O5 Heterojunction for Room-Temperature Ethanol Sensing

Ultraefficient Ammonia Gas Sensors Based on Pt‐Loaded WO3 Nanobars

Contact Info

Product

Resources

About

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Review—Recent Development of WO₃ for Toxic Gas Sensors Applications

Nanofiber-Structured SnO₂/Co₃O₄ Modified Ta₂O₅ Heterojunction for Room-Temperature Ethanol Sensing

Ultraefficient Ammonia Gas Sensors Based on Pt‐Loaded WO₃ Nanobars