Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Tang, Wenxian; Wang, Jing

doi:10.1016/j.snb.2014.10.018

Cited by 87 publications

(38 citation statements)

References 32 publications

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“…The reductive toluene vapours reacted with the chemically adsorbed oxygen ions, promoting the captured electron transition in the sensing mechanism. 32 This process can be explained as follows:…”

Section: Gas Sensing Characteristicsmentioning

confidence: 99%

Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection

et al. 2019

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Section: Gas Sensing Characteristicsmentioning

confidence: 99%

Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection

et al. 2019

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“…17 We know that V 2 O 5 is n-type semiconductor with intrinsic defects due to stoichiometric deviation in its crystal, such as oxygen vacancies. Quantitatively, conductivity change is governed by E g value which is defined as E g =E c -E v for n-type semiconductors and can be derived as following.…”

Section: (B-d)mentioning

confidence: 99%

Synthesis of vanadium pentoxide nanoneedles by physical vapour deposition and their highly sensitive behavior towards acetone at room temperature

et al. 2015

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The V 2 O 5 nanoneedles were synthesized by a facile physical vapour deposition approach. XRD patterns confirm good crystallinity of the as prepared nanoneedles.Chemical states of V 2 O 5 nanoneedles were confirmed through XPS analysis. Sensors based on V 2 O 5 nanoneedles were investigated for four types of gases (acetone, ammonia, ethanol and propylamine) at room temperature. High reproducible response and good selective behavior towards acetone was observed in both low and high concentration zones with the low detection limit of 941 ppb, which was explained on the basis of energy band model. The sensing mechanism has also been suggested.

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“…When a reductive gas such as toluene adsorbs on the ZnO surface, in fact it reacts with chemically adsorbed oxygen ions, which results in the release of electrons trapped in oxygen back to ZnO, as shown in Eqs. and :

{normalC}_{6} {normalH}_{5} C {normalH}_{3} + {normalO}_{2}^{-} \to {normalC}_{6} {normalH}_{5} C H {normalO}^{-} + {normalH}_{2} O + {normale}^{-},

{normalC}_{6} {normalH}_{5} C H {normalO}^{-} \to {normalC}_{6} {normalH}_{5} C H O + {normale}^{-} .

…”

Section: Resultsmentioning

confidence: 99%

Room temperature optical response of zinc oxide nanowires synthesized by chemical bath deposition to toluene vapors

Apostoluk

Parize

Vilquin

et al. 2016

Physica Status Solidi (a)

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International audienceZinc oxide (ZnO) nanowires were synthesized by a simple and cost-effective process, namely chemical bath deposition. X-ray diffraction (XRD) pattern clearly shows that the nanowires are well crystallized in the wurtzite hexagonal structure. Field-emission scanning electron microscope (FESEM) images show the formation of perfectly aligned and organized nanowires, with no defects visible on their surface. The diameter and length of nanowires is 65 and 850 nm, respectively. The room temperature UV-excited photoluminescence spectra show the excitonic band in the UV and a wide emission band centered in the visible. This excitonic and visible emission is studied in the presence of toluene vapors and the results demonstrate the change of the visible photoluminescence of ZnO nanowire array and that the material is able to adsorb toluene. Finally, the mechanism of toluene sensing is discussed. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei

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Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Cited by 87 publications

References 32 publications

Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection

Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection

Synthesis of vanadium pentoxide nanoneedles by physical vapour deposition and their highly sensitive behavior towards acetone at room temperature

Room temperature optical response of zinc oxide nanowires synthesized by chemical bath deposition to toluene vapors

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Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Cited by 87 publications

References 32 publications

Effect of vanadium pentoxide concentration in ZnO/V2O5 nanostructured composite thin films for toluene detection

Effect of vanadium pentoxide concentration in ZnO/V2O5 nanostructured composite thin films for toluene detection

Synthesis of vanadium pentoxide nanoneedles by physical vapour deposition and their highly sensitive behavior towards acetone at room temperature

Room temperature optical response of zinc oxide nanowires synthesized by chemical bath deposition to toluene vapors

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Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection

Effect of vanadium pentoxide concentration in ZnO/V₂O₅ nanostructured composite thin films for toluene detection