Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2 nanorods: Detailed study on the annealing temperature

Tshabalala, Zamaswazi P.; Shingange, Katekani; Dhonge, Baban P.; Ntwaeaborwa, O.M.; Mhlongo, G.H.; Motaung, David E.

doi:10.1016/j.snb.2016.07.023

Cited by 91 publications

(33 citation statements)

References 62 publications

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“…2. Room temperature gas sensors based on single phase semiconducting metal oxide nanostructures 2.1 N-type semiconducting metal oxide nanostructures and gas sensors N-type SMONs are the most reported sensing materials for RT resistive gas sensors, and they include ZnO, [152][153][154][155][156] SnO 2 , [157][158][159][160] In 2 O 3 , 161 WO 3 , 162 TiO 2 , [163][164][165][166] Fe 2 O 3 , [167][168][169] MoO 3 , 170 174 acetone, 175 alcohol, 106 HCHO, 176 liquefied petroleum gas (LPG), etc. Table 1 summarizes some of the reported RT sensors using the n-type SMONs.…”

Section: Yongqing Fumentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

558

328

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Section: Yongqing Fumentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

558

328

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“…The results proved that the degree of gas sensor promotion is more obvious with an increase in acetone concentration. According to the IUPAC definition, the limit of detection (LoD) = 3(Noise rms /slope) [34]. The sensor noise was extracted from the root-mean-square (rms) deviation of the response fluctuation using 30 points at the baseline without target gas and the slope was calculated from the linear part in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Acetone Gas Sensor Based on g-C3N4 Decorated MgFe2O4 Porous Microspheres Composites

Zhang

Wang

Zhang

et al. 2018

Sensors

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The g-C3N4 decorated magnesium ferrite (MgFe2O4) porous microspheres composites were successfully obtained via a one-step solvothermal method. The structure and morphology of the as-prepared MgFe2O4/g-C3N4 composites were characterized by the techniques of X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermal gravity and differential scanning calorimeter (TG–DSC) and N2-sorption. The gas sensing properties of the samples were measured and compared with a pure MgFe2O4-based sensor. The maximum response of the sensor based on MgFe2O4/g-C3N4 composites with 10 wt % g-C3N4 content to acetone is improved by about 145 times, while the optimum temperature was lowered by 60 °C. Moreover, the sensing mechanism and the reason for improving gas sensing performance were also discussed.

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“…The subpeaks located in the higher-binding-energy regions of the 2p 3/2 and 2p 1/2 peaks can be assigned to the Ti 4+ valence state, whereas those located in the lower-binding-energy regions can be assigned to the Ti 3+ valance state. The presence of the mixed Ti 4+ /Ti 3+ valance state indicated the presence of oxygen vacancies in the surfaces of the as-synthesized TiO 2 rods [ 27 ]. The O1s spectrum of the TiO 2 rods exhibited a marked asymmetric curve feature ( Figure 5 d).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Nanosized Island-Like CdO Crystallites-Decorated TiO2 Rod Nanocomposites via a Combinational Methodology and Their Low-Concentration NO2 Gas-Sensing Behavior

Liang

Wang

et al. 2017

Materials

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TiO2–CdO composite rods were synthesized through a hydrothermal method and sputtering thin-film deposition. The hydrothermally derived TiO2 rods exhibited a rectangular cross-sectional crystal feature with a smooth surface, and the as-synthesized CdO thin film exhibited a rounded granular surface feature. Structural analyses revealed that the CdO thin film sputtered onto the surfaces of the TiO2 rods formed a discontinuous shell layer comprising many island-like CdO crystallites. The TiO2–CdO composite rods were highly crystalline, and their surfaces were rugged. A comparison of the NO2 gas-sensing properties of the CdO thin film, TiO2 rods, and TiO2–CdO composite rods revealed that the composite rods exhibited superior gas-sensing responses to NO2 gas than did the CdO thin film and TiO2 rods, which can be attributed to the microstructural differences and the formation of heterojunctions between the TiO2 core and CdO crystallites.

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Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2 nanorods: Detailed study on the annealing temperature

Cited by 91 publications

References 62 publications

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Highly Sensitive Acetone Gas Sensor Based on g-C3N4 Decorated MgFe2O4 Porous Microspheres Composites

Fabrication of Nanosized Island-Like CdO Crystallites-Decorated TiO2 Rod Nanocomposites via a Combinational Methodology and Their Low-Concentration NO2 Gas-Sensing Behavior

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