Study of sensitivity and selectivity of α-Fe2O3 thin films for different toxic gases and alcohols

Zolghadr, S.; Khojier, K.; Kimiagar, Salimeh

doi:10.1016/j.mssp.2016.06.016

Cited by 26 publications

(9 citation statements)

References 21 publications

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“…S A and S B are the responses of a sensor to a target gas (gas A) and an interfering gas (gas B), respectively [14].…”

Section: Methodsmentioning

confidence: 99%

“…• Reproducibility of a sensor is evaluated by the change of sensing behavior after switching numerous times between the 'ON' state and 'OFF' state [14].…”

Section: Methodsmentioning

confidence: 99%

“…4. It is noteworthy that the highest response value for various vapors is obtained at different temperatures in the following order: formaldehyde (11) at 360°C, acetic acid (11) at 320°C, acetylene (8) at 360°C, formic acid (7) at 360°C, toluene (8) at 360°C, benzene (7) at 360°C, acetone (30) at 280°C, ethanol (14) at 320°C, methanol (10) at 360°C, and isopropanol (23) at 280°C. This behavior can be due to the fact that the energy of adsorption, reaction, and desorption of various vapors on the film's surface is different.…”

Section: Methodsmentioning

confidence: 99%

“…It can be seen that the response of the sample is decreased with the time lapse from 30 to 26 (namely, about 87% stability) and then found a steady state. The mentioned reduction of response may be This work a RaÀRg Ra Â 100 b (R a /R g ), (*): values given in column 6 were obtained from the curves in the literature and may not be accurate attributed to the reaction of the film surface with its surroundings between and during the measurements, especially humidity [14].…”

Section: Omentioning

confidence: 99%

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Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

2017

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This research addresses a detailed study on the sensitivity and selectivity of ZnO thin film to volatile organic compound (VOC) vapors that can be used for the development of VOC sensors. The ZnO thin film of 100 nm thickness was prepared by post-annealing of e-beam evaporated Zn thin film. The sample was structurally, morphologically, and chemically characterized by X-ray diffraction and field emission scanning electron microscopy analyses. The sensitivity, selectivity, and detection limit of the sample were tested with respect to a wide range of common VOC vapors, including acetone, formaldehyde, acetic acid, formic acid, acetylene, toluene, benzene, ethanol, methanol, and isopropanol in the temperature range of 200-400°C. The results show that the best sensitivity and detection limit of the sample are related to acetone vapor in the studied temperature range. The ZnO thin film-based acetone sensor also shows a good reproducibility and stability at the operating temperature of 280°C.

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“…S A and S B are the responses of a sensor to a target gas (gas A) and an interfering gas (gas B), respectively [14].…”

Section: Methodsmentioning

confidence: 99%

“…• Reproducibility of a sensor is evaluated by the change of sensing behavior after switching numerous times between the 'ON' state and 'OFF' state [14].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Omentioning

confidence: 99%

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Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

2017

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“…Hematite iron oxide (αFe 2 O 3 ) is a nanomaterial with desirable properties including stability, excellent solar activity, inexpensiveness and durability, in addition to having a short energy band. This compound thus has various uses in applications like catalysts, photo electrochemical cell, magnetic applications, gas sensors, and lithium ion batteries . The major drawback concerning αFe 2 O 3 is its low conductivity, which impedes its performance in various hematite anodes .…”

Section: Introductionmentioning

confidence: 99%

A Gr/αFe₂O₃/Carbon Paste Electrode Developed as an Electrochemical Sensor for Determination of Rizatriptan Benzoate: An Antimigraine Drug

et al. 2019

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In this research, a new electrochemical sensor was proposed for determining rizatriptan benzoate (RZB) with high sensitivity.To this end, a nanocomposite consisting of graphene (Gr) and hematite iron oxide (αFe 2 O 3 ) was used to modify a carbon paste electrode (CPE). Field emission scanning electron microscopy (FESEM) was employed to study the morphology of the fabricated electrode; cyclic voltammetry (CV), chronoamperometry (CA), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV) were utilized to evaluate the modified electrode's capabilities. The findings demonstrated the high sensitivity of the designed electrode in the determination of RZB. In addition, to optimize the response of the electrochemical sensor, changes in the voltammetric behavior of RZB under different scan rates and pH conditions were explored. The results showed that under optimal conditions, RZB concentrations between 2 and 50 μM induced an oxidation anodic peak current that could detect the substance with a low limit of merely 0.42 μM. The findings of the present study demonstrated the fabricated electrode high sensitivity, low detection limit, wide linear dynamic range, remarkable reproducibility, rapid response, and high current peak response in detecting various concentrations of RZB. Furthermore, a kinetically facile system with minimal charge transfer resistance and adequate RZB diffusion was present on the electrode surface. Finally, the proposed electrode was successfully utilized in the detection of RZB in various samples.

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Study of nanostructure and ethanol vapor sensing performance of WO3 thin films deposited by e-beam evaporation method under different deposition angles: application in breath analysis devices

2017

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Study of sensitivity and selectivity of α-Fe2O3 thin films for different toxic gases and alcohols

Cited by 26 publications

References 21 publications

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

A Gr/αFe₂O₃/Carbon Paste Electrode Developed as an Electrochemical Sensor for Determination of Rizatriptan Benzoate: An Antimigraine Drug

Study of nanostructure and ethanol vapor sensing performance of WO3 thin films deposited by e-beam evaporation method under different deposition angles: application in breath analysis devices

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Study of sensitivity and selectivity of α-Fe2O3 thin films for different toxic gases and alcohols

Cited by 26 publications

References 21 publications

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

A Gr/αFe2O3/Carbon Paste Electrode Developed as an Electrochemical Sensor for Determination of Rizatriptan Benzoate: An Antimigraine Drug

Study of nanostructure and ethanol vapor sensing performance of WO3 thin films deposited by e-beam evaporation method under different deposition angles: application in breath analysis devices

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A Gr/αFe₂O₃/Carbon Paste Electrode Developed as an Electrochemical Sensor for Determination of Rizatriptan Benzoate: An Antimigraine Drug