Microstructural and morphological insight of wide band gap SnO2 towards gas sensor applications

Mangaiyarkkarasi, J.; Meenakumari, V.; Thenmozhi, N.

doi:10.1007/s12046-023-02138-8

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…where: is the absorption coefficient, is the average band gap of the material, depends on the type of transition The control sample was with 3.08 eV optical band gap, whereas higher optical band gaps of 3.17 and 3.24 eV were noticed at higher gamma irradiation doses. The attained blue shift could be because of crystal defect and surface morphology changes, as the optical behavior of metal oxide depends on the surface roughness, defect, and crystal structure [45,46]. The obtained results are in good agreement with previously published data [47][48][49][50].…”

Section: Resultssupporting

confidence: 90%

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

Alramadany,

Rejah

2023

IJP

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This study reports the fabrication of tin oxide (SnO2) thin films using pulsed laser deposition (PLD). The effect of 60Co (300, 900, and 1200 Gy) gamma radiation on the structural, morphological, and optical features is systematically demonstrated using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and ultraviolet-visible light analysis (UV-Vis), respectively In XRD tests, the size of the crystallites decreased from 45.5 to 40.8 nm for the control samples and from 1200 Gy to 60Co for the irradiated samples. Using FESEM analysis, the particle diameter revealed a similar trend to that attained using XRD; in particular, the average diameters were 93.8 and 79.9 nm for the samples mentioned above. A similar profile was observed for the AFM analysis in which an increase in the radiation dose from 300 to 1200 Gy resulted in a decrease in the RMS values from 74.6 to 32.25 nm. Contrariwise, the calculated optical band gap demonstrated an increasing profile where optical band gaps of 3.08 and 3.18 eV were acquired for control and samples irradiated with 900 Gy. However, the attained optical band gap was further increased to 3.24 eV due to the 60Co gamma radiation increment to 1200 Gy.

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Section: Resultssupporting

confidence: 90%

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

Alramadany,

Rejah

2023

IJP

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“…The SnO2 measured bands at 541 cm -1 and 608 cm -1 , demonstrate Sn-O and O-Sn-O, respectively. The vibrational stretching of the O-H and C=O bonds are attributed for the appearance of bands 3390 cm -1 and 1631 cm -1 , respectively [14]. The presence of GO is indicated by bands that are positioned at 1721 cm -1 and 1080 cm -1 , respectively, displaying double C=O and single bond-stretching, C-O.…”

Section: Ftir Analysis Go Sno2 and Go-sno2mentioning

confidence: 99%

A comparative study on the gas sensing performance of SnO₂ and GO-SnO₂ sensor devices.

Oppong Amoh,

Elwardany,

Fujii

et al. 2024

J. Phys.: Conf. Ser.

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Using Modified Hummer’s technique, eco-friendly carbon derivative (GO) nanoparticles were obtained from polyethylene terephthalate (PET) precursor. Nanocomposite of GO-SnO2 and undoped SnO2 were synthesized using the coprecipitation method. The as-prepared nanoparticles were subjected to diverse analytical processes employing Transmission electron microscopy (TEM) to study the internal morphological properties of the nanoparticles. Energy dispersive X-ray spectroscopy (EDX) was used to examine elemental quantifications of the nanopowders. Fourier-transform infrared (FTIR) spectroscopy was used to analyze bond structures and functional groups. Dynamic responses of various gas sensor devices to 20 ppm concentrations of methane (CH4) and hydrogen (H2) were investigated as a function of time at room temperature. The GO-SnO2 nanocomposite sensing device demonstrated an ideal detection response with values of 5.00 and 5.08, corresponding to methane and hydrogen analyte gases. The doped SnO2 sensor device outperformed the pure SnO2, accounting for the GO-SnO2 > SnO2 order. Regarding the target gases, the synthesized nanocomposite demonstrated stability and selectivity in the following order of magnitude: H2 > CH4. The GO doping effect was found to have introduced surface defects, increased pores, and enabled more oxygen-active sites to be formed on the sensor device’s surface for dynamic gas sensing response, providing a comparatively enhanced sensor response.

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“…4 provides functional group information of the as-prepared nanostructures with frequency range from 450 cm -1 to 4000 cm -1 using FTIR. The band positioning and peak numbers are greatly influenced by morphological characteristics and the chemical constitution of the as-synthesized nanopowders [46]. Pristine SnO2 showed bands of 541 cm -1 and 608 cm -1 , representing Sn-O and O-Sn-O, respectively.…”

Section: Ftir Analysis Go Sno2 and Go-sno2mentioning

confidence: 99%

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

Amoh,

Elwardany,

Fujii

et al. 2024

JNanoR

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Room temperature-built gas sensors were fabricated from graphene oxide (GO), pristine and doped SnO2 nanostructures. The as-synthesized green carbon derivative (GO) nanomaterials were prepared from waste plastic precursor using Modified Hummer’s methodology. Pristine SnO2 and GO-SnO2 nanocomposite were synthesized employing a wet synthesis technique known as co-precipitation. The as-prepared nanoparticles were investigated for structural crystallographic and morphological features using X-ray diffractometry (XRD) and Transmission electron microscopy (TEM) analytical techniques. High-angle annular dark field (HAADF) and elemental quantifications of the nanopowders were investigated with the Energy dispersive X-ray spectroscopy (EDX). Textural features were determined with the assistance of Brunauer-Emmett-Teller (BET) analyzer. Thermogravimetric analysis (TGA) was performed to ascertain the material stability and degradability of the synthetic materials. Functional group and bond structure analysis was conducted using Fourier-transform infrared (FTIR) spectroscopy. Gas sensor devices were tested for responses towards CH4, H2, LPG, and CO2 gases at 20 ppm concentrations of each. GO-SnO2 nanocomposite sensing device showed optimal detection response towards the respective analyte gases with values of 5.00, 5.08, 4.90 and 3.41 respectively. The prepared nanocomposite showed stability and selectivity towards the target gases in an order of magnitude of H2 > CH4 > LPG > CO2. The optimal gas sensor device’s dynamic gas sensing response was ascribed to the GO doping effect which relatively increased its surface area (46.48 m2g-1) and absorption sites.

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Microstructural and morphological insight of wide band gap SnO2 towards gas sensor applications

Cited by 4 publications

References 32 publications

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

A comparative study on the gas sensing performance of SnO₂ and GO-SnO₂ sensor devices.

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

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Microstructural and morphological insight of wide band gap SnO2 towards gas sensor applications

Cited by 4 publications

References 32 publications

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

Study of The Structural, Optical, and Morphological Properties of Sno2 Nanofilms under the Influence of Gamma Rays

A comparative study on the gas sensing performance of SnO2 and GO-SnO2 sensor devices.

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

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A comparative study on the gas sensing performance of SnO₂ and GO-SnO₂ sensor devices.