Ethanol sensing behaviour of sol–gel dip-coated TiO2 thin films

Pandeeswari, R.; Karn, Rakesh Kumar; Jeyaprakash, B.G.

doi:10.1016/j.snb.2013.12.122

Cited by 61 publications

(14 citation statements)

References 20 publications

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“…Many reports about the detection of different gases and volatile organic compounds, such as NO 2 [22], ethanol [23], H 2 S [24], and acetone [25], by pristine or doped α-Fe 2 O 3 can be found in literature. Nowadays, many efforts have been aimed at enhancing the gas-sensing performance of α-Fe 2 O 3 sensors by controlling its microstructure through many physical/chemical preparation techniques.…”

Section: Introductionmentioning

confidence: 99%

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

Hjiri

Aida

Neri

2019

Sensors

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In the present work, hematite (α-Fe2O3) nanopowders were successfully prepared via a hydrothermal route. The morphology and microstructure of the synthesized nanopowders were analyzed by using scanning and transmission electron microscopy (SEM and TEM, respectively) analysis and X-ray diffraction. Gas sensing devices were fabricated by printing α-Fe2O3 nanopowders on alumina substrates provided with an interdigitated platinum electrode. To determine the sensor sensitivity toward NO2, one of the main environmental pollutants, tests with low concentrations of NO2 in air were carried out. The results of sensing tests performed at the operating temperature of 200 °C have shown that the α-Fe2O3 sensor exhibits p-type semiconductor behavior and high sensitivity. Further, the dynamics exhibited by the sensor are also very fast. Lastly, to determine the selectivity of the α-Fe2O3 sensor, it was tested toward different gases. The sensor displayed large selectivity to nitrogen dioxide, which can be attributed to larger affinity towards NO2 in comparison to other pollutant gases present in the environment, such as CO and CO2.

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Section: Introductionmentioning

confidence: 99%

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

Hjiri

Aida

Neri

2019

Sensors

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“…Titanium dioxide (TiO 2 ), as an n‐type, wide band gap, oxide semiconductor synthesized in various nanostructured forms, has been considered to be a promising material for the use as an active sensing layer in various gas sensors for the detection of formaldehyde, hydrogen, ethanol, ammonia, carbon monoxide, etc . Various types of sol‐gel technology are the most widely used methods for manufacturing sensing layers on the basis of titania because of their simplicity and low cost.…”

Section: Introductionmentioning

confidence: 93%

CVD Deposited Titania Thin Films for Gas Sensors with Improved Operating Characteristics

Baryshnikova

Filatov

Petrov

et al. 2015

Chemical Vapor Deposition

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This paper describes the results of experimental evaluation of titanium dioxide thin films formed by CVD as active layers in semiconductor, resistive sensors for detection of ethanol vapors. TiO 2 layers with a thickness of 90 nm are formed by CVD in the TTIP-O 2 -O 3 -Ar reaction system. Sensors manufactured with titania films formed under all the deposition conditions studied exhibit good electrical response to the ethanol vapors, with quick response-recovery characteristics in the temperature range 170-300 8C. Sensor performance is determined by the relative amount of anatase phase and grain size in the films. The response value (R air /R ethanol ) of the sample with the highest degree of crystallinity reached 37 at an operating temperature of 200 8C.

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“…Ethanol (C 2 H 5 OH is a flammable volatile organic compound that is widely used with many applications such as chemical industries, transportation, medical, laboratory, food and etc . Exposure to ethanol vapor can result in various health problems such as headache, drowsiness, liver damage and so on . Maximum recommended ethanol exposure level is established to be 1000 ppm according to the Occupational Safety and Health Administration .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Gas‐Sensing Performances of Ru‐Loaded p‐Type Co₃O₄ Nanoparticles

Kruefu

Inpan

Leangtanom

et al. 2018

Physica Status Solidi (a)

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Co 3 O 4 nanoparticles (NPs) and Co 3 O 4 NPs-functionalized with 0.25, 0.50, and 1.00 wt.% Ruthenium (Ru) are synthesized by the precipitation and impregnation methods. X-ray diffraction data confirm that all samples are highly crystalline with a typical cubic Co 3 O 4 NPs structure. Electron microscopic images show spherical morphologies of Co 3 O 4 nanoparticles with the diameters of 10-30 nm and Ru nanoparticles with relatively small diameters of 2-4 nm loaded on Co 3 O 4 surfaces. The gas-sensing results reveal that Ru loading at an optimally low Ru content of 0.25 wt.% led to significantly enhanced ethanol sensing performances. Specifically, the 0.25 wt.%Ru/Co 3 O 4 sensor exhibits a good p-type response of %30 to 100 ppm C 2 H 5 OH, short response time (0.08 s), good recovery time (a few minutes) and high C 2 H 5 OH selectivity against H 2 S, H 2 , NH 3 , NO 2 , and SO 2 . Therefore, the Ru-loaded Co 3 O 4 sensor is a promising alternative p-type gas sensor for ethanol detection.

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Ethanol sensing behaviour of sol–gel dip-coated TiO2 thin films

Cited by 61 publications

References 20 publications

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

CVD Deposited Titania Thin Films for Gas Sensors with Improved Operating Characteristics

Enhanced Gas‐Sensing Performances of Ru‐Loaded p‐Type Co₃O₄ Nanoparticles

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Ethanol sensing behaviour of sol–gel dip-coated TiO2 thin films

Cited by 61 publications

References 20 publications

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

NO2 Selective Sensor Based on α-Fe2O3 Nanoparticles Synthesized via Hydrothermal Technique

CVD Deposited Titania Thin Films for Gas Sensors with Improved Operating Characteristics

Enhanced Gas‐Sensing Performances of Ru‐Loaded p‐Type Co3O4 Nanoparticles

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Enhanced Gas‐Sensing Performances of Ru‐Loaded p‐Type Co₃O₄ Nanoparticles