Analysis of the optical, chemical, surface, and humidity sensing characteristics of nanostructured Bi2O3-doped MoO3 materials

Singh, Peramjeet; Pandey, Narendra Kumar; Awasthi, R.R.; Kumar, Vinod; Verma, Vernica; Kumar, Brijesh; Sulania, I.; Yadav, Neelam; Srivastava, S.; Verma, A.K.; Dawar, A.

doi:10.1016/j.matpr.2023.01.398

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…Both response and recovery time for the YCeO-based sensors are protracted with the increase in H 2 concentration. The recovery time is the amount of time needed to lessen the gap between the maximum and lowest current, and the response time (tres) is the amount of time required for the relative current change to reach 90% of the steady state value following H 2 injection [13][14][15][16]. As shown in Figure 2c,d, the YCeO sensor demonstrated a decent response at 28…”

Section: H 2 Gas Sensingmentioning

confidence: 98%

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Srivastava,

Pandy,

Verma

et al. 2023

Asec 2023

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Section: H 2 Gas Sensingmentioning

confidence: 98%

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Srivastava,

Pandy,

Verma

et al. 2023

Asec 2023

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“…The sensor response time toward CO 2 is an important parameter for approximating material performance, as it determines the delay to reach the exact gas concentration value and the time required to prepare the sensor for the subsequent measurement. 49 The response time (t res ) is defined as the time taken for the relative resistance change to reach 90% of the steady 50,51 state value after CO 2 injection, while the recovery time is for the delay required to reduce the difference between highest and lowest resistance. The YCeO sensor manifested decent response at 30 °C and exhibited almost a linear increase with CO 2 concentrations as shown in Fig.…”

Section: Co 2 Sensing Analysismentioning

confidence: 99%

Fabrication of Highly Sensitive YCeO Chemo-resistive Gas Sensor for Selective Detection of CO₂

Srivastava,

Pandey,

Verma

et al. 2024

ECS Sens. Plus

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A room-temperature-operated CO2 gas sensor based on YCeO nanocomposite was effectively prepared by the simple hydrothermal technique to detect low traces of CO2 (50-250 ppm). The YCeO granular morphological features were observed using field-emission scanning electron microscopy, which confirmed successful fabrication of nanocomposite of Y2O3 and CeO2. X-ray diffraction of YCeO showed the Cubic structure of space group Fm3m having density 6.74 gmcm-3. Rietveld refinement was performed for the analysis of complete crystal structural property. Surface porosity and specific surface area were observed by Brunnauer-Emmet Teller analysis. Optical properties were observed using UV-Visible spectroscopy. The band gap, optical conductivity, and refractive index calculated were 3.44 eV, 2.63×106, and 0.1164, respectively. Fourier transform infrared spectroscopy was done to analyze the functional and elastic properties of as-prepared nanomaterial. The highest sensor response recorded was 2.14. The response and recovery time at 50 ppm observed were 75.6 and 107.3 s, respectively. The YCeO chemo-resistive sensor confirmed long-term stability and selectivity to CO2 as compared to other gases viz. LPG, NH3, CH4, H2S, NO2 and H2. The relative humidity exposure was also performed at 15, 55 and 95% RH, in which it was confirmed that the sensor would give best response at mid humidity level i.e. 55 %RH. Sensing characteristics curve of YCeO nanocomposite at different temperature (30-90°C) at 50 ppm confirmed that YCeO sensor performed excellent at room temperature. This report unlocks an innovative opening for the fabrication of sensing devices that are room-temperature-operatable, highly-sensitive and selective for quick detection of CO2 gas for its commercialization

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Analysis of the optical, chemical, surface, and humidity sensing characteristics of nanostructured Bi2O3-doped MoO3 materials

Cited by 2 publications

References 22 publications

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Fabrication of Highly Sensitive YCeO Chemo-resistive Gas Sensor for Selective Detection of CO₂

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Analysis of the optical, chemical, surface, and humidity sensing characteristics of nanostructured Bi2O3-doped MoO3 materials

Cited by 2 publications

References 22 publications

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Development of Yttrium-Cerium Oxide Gas Sensor for Low ppm Hydrogen Detection

Fabrication of Highly Sensitive YCeO Chemo-resistive Gas Sensor for Selective Detection of CO2

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Fabrication of Highly Sensitive YCeO Chemo-resistive Gas Sensor for Selective Detection of CO₂