Room-temperature gas sensors based on titanium dioxide quantum dots for highly sensitive and selective H2S detection

Wu, Kaidi; Zhang, Wentao; Zheng, Zichen; Debliquy, Marc; Zhang, Chao

doi:10.1016/j.apsusc.2022.152744

Cited by 32 publications

(6 citation statements)

References 55 publications

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“…Accordingly, upon preparation of the TiO 2 @rGO-NC the SSA was preserved. Not unexpectedly, the high SSA of TiO 2 -NPs is beneficial for MeOH sensing 28,48,49 .…”

Section: Catalysis Science and Technology Accepted Manuscriptmentioning

confidence: 96%

“…Not unexpectedly, the high SSA of TiO 2 -NPs is beneficial for MeOH sensing. 28,48,49 Operando-DRIFTS and in situ-ATR-FTIR spectroscopy during room temperature methanol sensing Fig. 2A shows the setup for simultaneous room temperature measurements of the resistance R and the corresponding DRIFTS spectra of the sensor materials (for a pulse, the time delay between measurements is only ≤5 s).…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

See 1 more Smart Citation

Operando monitoring of a room temperature nanocomposite methanol sensor

Maqbool

Yigit

Stöger‐Pollach

et al. 2023

Catal. Sci. Technol.

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“…Accordingly, upon preparation of the TiO 2 @rGO-NC the SSA was preserved. Not unexpectedly, the high SSA of TiO 2 -NPs is beneficial for MeOH sensing 28,48,49 .…”

Section: Catalysis Science and Technology Accepted Manuscriptmentioning

confidence: 96%

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Operando monitoring of a room temperature nanocomposite methanol sensor

Maqbool

Yigit

Stöger‐Pollach

et al. 2023

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Furthermore, in some studies, the response was interpreted as the ratio between the sensor element's resistance in air and during the test gas. Therefore, the response is written for reducing and oxidizing gases using the following Equations (4) for reducing gas and (5) for oxidizing gas [ 116,117 ] :

\begin{matrix} Response = \frac{R_{a}}{R_{g}} & [Reducing gas] \end{matrix}

\begin{matrix} Response = \frac{R_{g}}{R_{a}} & [Oxidizing gas] \end{matrix}

…”

Section: Key Sensor Parametersmentioning

confidence: 99%

Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

et al. 2022

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Air pollution is a severe concern globally as it disturbs the health conditions of living beings and the environment because of the discharge of acetone molecules. Metal oxide semiconductor (MOS) nanomaterials are crucial for developing efficient sensors because of their outstanding chemical and physical properties, empowering the inclusive developments in gas sensor productivity. This review presents the ZnO nanostructure state of the art and notable growth, and their structural, morphological, electronic, optical, and acetone-sensing properties. The key parameters, such as response, gas detection limit, sensitivity, reproducibility, response and recovery time, selectivity, and stability of the acetone sensor, have been discussed. Furthermore, gas-sensing mechanism models based on MOS for acetone sensing are reported and discussed. Finally, future possibilities and challenges for MOS (ZnO)-based gas sensors for acetone detection have also been explored.

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“…QDs with extremely small sizes are attractive for constructing gas sensors due to their size-dependent bandgaps, large surface area, and unsaturated bonds to help adsorption and reaction of gas molecules [24]. Especially, MOS QDs, including SnO 2 QDs, WO 3 QDs and ZnO QDs have been reported to detect gas even at low temperatures directly [24][25][26][27]. However, their application in gas sensing is still in its early stages, and limited by many factors, such as complicated and expensive synthesis techniques, small yield, aggregation.…”

Section: Introductionmentioning

confidence: 99%

SnO₂ QDs sensitized ZnFe₂O₄ spheres with enhanced acetone sensing performance

Yuan,

Li,

Xia

et al. 2024

Nanotechnology

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Herein, SnO2 QDs (<10 nm) with small size instead of conventional nanoparticles was employed to modify ZnFe2O4to synthesize porous and heterogeneous SnO2/ZnFe2O4(ZFSQ) composites for gas sensing. By an immersion process combined with calcination treatment, the resultant porous ZFSQ composites with different contents of SnO2 QDs were obtained and their sensing properties were investigated. Compared with that of bare ZnFe2O4 and SnO2 QDs, porous ZFSQ composites based sensors showed much improved sensor response to acetone. For contrast, the sensor performance of ZFSQ composites was also compared with that of ZnFe2O4 sphere modified with SnO2 nanoparticles. The porous ZFSQ composite with 5 wt% SnO2 QDs (ZFSQ-5) showed better acetone sensing response than that of other ZFSQ composites, and it exhibited a high response value of 110 to 100 ppm of acetone and a low detection limit of 0.3 ppm at 240℃ . In addition to the rich heterojunctions and porous structure, SnO2 QDs with large surface area and quantum effect was another indispensable reason for the improved sensor performance. Finally, the ZFSQ-5 composite sensor was attempted to be applied for acetone sensing in exhaled breath, suggesting its great potential in monitoring of acetone.

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Room-temperature gas sensors based on titanium dioxide quantum dots for highly sensitive and selective H2S detection

Cited by 32 publications

References 55 publications

Operando monitoring of a room temperature nanocomposite methanol sensor

Operando monitoring of a room temperature nanocomposite methanol sensor

Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

SnO₂ QDs sensitized ZnFe₂O₄ spheres with enhanced acetone sensing performance

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Room-temperature gas sensors based on titanium dioxide quantum dots for highly sensitive and selective H2S detection

Cited by 32 publications

References 55 publications

Operando monitoring of a room temperature nanocomposite methanol sensor

Operando monitoring of a room temperature nanocomposite methanol sensor

Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

SnO2 QDs sensitized ZnFe2O4 spheres with enhanced acetone sensing performance

Contact Info

Product

Resources

About

SnO₂ QDs sensitized ZnFe₂O₄ spheres with enhanced acetone sensing performance