Highly Sensing Properties Sensors Based on Ce-doped ZnO and SnO2 Nanoparticles to Ethanol Gas

El-Sayed, A. M.; Yakout, S.M.

doi:10.5171/2016.690025

Cited by 6 publications

(7 citation statements)

References 16 publications

(16 reference statements)

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“…The highest response is found to be 231 toward 8100 ppm of ethanol vapor. samples where 100 ppm ethanol gas were used at 400°C for their study [37]. Above all these reports are ethanol sensing but shows comparatively in higher operating temperature.…”

Section: Gas Sensing Performancesmentioning

confidence: 99%

Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods

Sinha

Mahapatra

Mondal

et al. 2020

Physica E: Low-dimensional Systems and Nanostructures

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Section: Gas Sensing Performancesmentioning

confidence: 99%

Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods

Sinha

Mahapatra

Mondal

et al. 2020

Physica E: Low-dimensional Systems and Nanostructures

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“…As an important low-cost basic II-VI semiconductor material, zinc oxide (ZnO) nanostructures have attracted a great deal of interest for their unique characteristics such as n-type native conduction, wide and direct band gap energy (3.3 eV) at room temperature, large exciton binding energy (60 meV), excellent thermal stability, high electron mobility and specific electrical and optical properties [1]. ZnO can be used for several technological applications in electronics, optoelectronics, gas sensors, photonic devices and photocatalyst [2][3][4][5][6]. ZnO nanostructures have been synthesized by various methods.…”

Section: Introductionmentioning

confidence: 99%

“…Doping is considered as an effective way to improve ZnO properties for various applications. Cerium is one of the rare earth metal elements that has a strong effect on structural characteristics of ZnO nanostructures [6,13,[16][17][18][19]. Ce-doped ZnO nanorods have been synthesized by various methods: wet-chemical method [10], hydrothermal route [14,16], CVD [7] and electrochemical process [18].…”

Section: Introductionmentioning

confidence: 99%

Structural and morphological characterizations of pure and Ce-doped ZnO nanorods hydrothermally synthesized with different caustic bases

Abdelouhab

Djouadi

Chelouche

et al. 2020

Materials Science-Poland

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This investigation concerns the synthesis as well as structural and morphological characterizations of pure and Ce-doped ZnO nanorods. The samples were synthesized by simple low-temperature hydrothermal process using respectively NaOH and KOH as caustic bases. The as-synthesized nanorods were characterized in terms of their morphological, structural, compositional and vibrational properties. The sizes of the rods were found to be 1.5 μm to 2 μm in length and 250 nm to 300 nm in diameter. The presence of Ce ions in ZnO (NaOH) favored the agglomeration of the rods to form flower-like nanostructures. EDAX measurements showed Zn rich materials with high oxygen vacancy concentration. XRD results indicated that the synthesized ZnO nanorods possess a pure wurtzite structure with good crystallinity. It has also been found that Ce doping deteriorates the crystalline quality of ZnO (NaOH) and improves that of ZnO (KOH). The insignificant intensities observed in FT-IR signals confirm that the synthesized nanorods are of high purity. The Raman spectroscopy studies showed that Ce ions shift the vibrational modes towards lower frequencies. The peaks related to E2 (high) mode in ZnO (KOH) are relatively intense compared to those of ZnO (NaOH). The peaks are found to be shifted and asymmetrically broadened due to anharmonic effects originating from quantum-phonon-effect confinement.

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“…After the annealing, the content of OH-groups becomes negligible. For comparison, the content of OH-groups in chemically synthesized tin dioxide materials is much higher as confirmed by IR spectroscopy [ 25 , 26 ].…”

Section: Resultsmentioning

confidence: 99%

Reducing Humidity Response of Gas Sensors for Medical Applications: Use of Spark Discharge Synthesis of Metal Oxide Nanoparticles

Vasiliev

Varfolomeev

Волков

et al. 2018

Sensors

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The application of gas sensors in breath analysis is an important trend in the early diagnostics of different diseases including lung cancer, ulcers, and enteric infection. However, traditional methods of synthesis of metal oxide gas-sensing materials for semiconductor sensors based on wet sol-gel processes give relatively high sensitivity of the gas sensor to changing humidity. The sol-gel process leading to the formation of superficial hydroxyl groups on oxide particles is responsible for the strong response of the sensing material to this factor. In our work, we investigated the possibility to synthesize metal oxide materials with reduced sensitivity to water vapors. Dry synthesis of SnO2 nanoparticles was implemented in gas phase by spark discharge, enabling the reduction of the hydroxyl concentration on the surface and allowing the production of tin dioxide powder with specific surface area of about 40 m2/g after annealing at 610 °C. The drop in sensor resistance does not exceed 20% when air humidity increases from 40 to 100%, whereas the response to 100 ppm of hydrogen is a factor of 8 with very short response time of about 1 s. The sensor response was tested in mixtures of air with hydrogen, which is the marker of enteric infections and the marker of early stage fire, and in a mixture of air with lactate (marker of stomach cancer) and ammonia gas (marker of Helicobacter pylori, responsible for stomach ulcers).

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Highly Sensing Properties Sensors Based on Ce-doped ZnO and SnO2 Nanoparticles to Ethanol Gas

Cited by 6 publications

References 16 publications

Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods

Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods

Structural and morphological characterizations of pure and Ce-doped ZnO nanorods hydrothermally synthesized with different caustic bases

Reducing Humidity Response of Gas Sensors for Medical Applications: Use of Spark Discharge Synthesis of Metal Oxide Nanoparticles

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