Facile Synthesis of Nano-Diced SnO2–ZnO Composite by Chemical Route for Gas Sensor Application

Pakhare, K. S.; Sargar, Balasaheb M.; Potdar, Swapnil S.; Sharma, Ashok K.; Patil, Umakant M.

doi:10.1007/s11664-019-07419-9

Cited by 19 publications

(6 citation statements)

References 43 publications

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“…It was found that better sensitive properties are recorded when the particle size of the gas-sensitive material is below 20-30 nm [23,29,[38][39][40][41][42]. If crystallite size is higher, the sensitivity is usually lower [43][44][45]. On the other hand, the best gas-sensitive properties are shown for materials with the one component concentration equal to 10% or lower [15,29,46].…”

Section: Introductionmentioning

confidence: 99%

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

et al. 2022

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Gas sensors based on the multi-sensor platform MSP 632, with thin nanocomposite films based on tin dioxide with a low content of zinc oxide (0.5–5 mol.%), were synthesized using a solid-phase low-temperature pyrolysis technique. The resulting gas-sensitive ZnO-SnO2 films were comprehensively studied by atomic force microscopy, Kelvin probe force microscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy, energy dispersive X-ray spectrometry, and X-ray photoelectron spectroscopy. The obtained films are up to 200 nm thick and consist of ZnO-SnO2 nanocomposites, with ZnO and SnO2 crystallite sizes of 4–30 nm. Measurements of ZnO-SnO2 films containing 0.5 mol.% ZnO showed the existence of large values of surface potential, up to 1800 mV, leading to the formation of a strong surface electric field with a strength of up to 2 × 107 V/cm. The presence of a strong surface electric field leads to the best gas-sensitive properties: the sensor’s responsivity is between two and nine times higher than that of sensors based on ZnO-SnO2 films of other compositions. A study of characteristics sensitive to NO2 (0.1–50 ppm) showed that gas sensors based on the ZnO-SnO2 film demonstrated a high sensitivity to NO2 with a concentration of 0.1 ppm at an operating temperature of 200 °C.

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Section: Introductionmentioning

confidence: 99%

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

et al. 2022

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“…Afterward, in the accumulated layer, they recombine with the free holes, decrease the hole concentration, and increase the electrical resistance of the gas sensor material. [ 26–27 ]…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Calcium Ferrite by Inherent Source for Ethanol Sensor

Pakhare

Sargar

Patil

et al. 2021

Macromolecular Symposia

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In this work, CaFe2O4 is successfully synthesized with a natural source of precursors by the milling method. The X‐ray diffraction confirms the orthorhombic CaFe2O4 compound. Scanning electron microscopy shows agglomerated porous crystalline type morphology. Photoluminescence spectra show that CaFe2O4 absorbs visible regain at wavelength 584 nm. The synthesized CaFe2O4 compound shows p‐type gas sensing behavior and high gas response towards ethanol 38.4% at 225˚C operating temperature at a concentration of 120 ppm ethanol gas.

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“…A comparison of gas sensing abilities of different ZnO-SnO 2 composites prepared by different techniques is shown in Table 3. [6,7,[37][38][39][40] It is seen that the ZnO-SnO 2 composites showed the selectivity toward other gases such as ethanol, methanol, NO 2 , and CO rather than www.advancedsciencenews.com www.pss-a.com NH 3 . However, in our case, the Zn 2 SnO 4 -SnO 2 composite film shows a maximum response to NH 3 compared with other gases.…”

Section: Selectivitymentioning

confidence: 99%

Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection

Cynthia

Sivakumar

Sanjeeviraja

et al. 2020

Physica Status Solidi (a)

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Recently, metal oxide semiconductors have attracted the research community because of their highly appreciable optoelectronic properties, which made them more suitable for many device applications such as super capacitors, solar cells, gas sensors, photocatalysts, light emitting devices, and so on. [1-5] As a further development it was observed that coupling of two metal oxide semiconductors with different bandgaps improved their physical and chemical properties by affecting their electron-hole pair. These improved physical and chemical properties equipped many of the composite metal oxide semiconductors to act as good gas sensors. For instance, Chesler et al. concluded in their report that ZnO-SnO 2 composite sensor showed an increased sensor response (SR) toward CO than the pristine oxides. [6] In addition, Zhao et al. reported that the ZnO-SnO 2 heterostructures showed enhanced selectivity and response toward NO 2 and ethanol when compared with pure ZnO nanowire. [7] Furthermore, Mondal et al. said that the ZnO-SnO 2 composite thin film sensor showed enhanced sensing property over ZnO sensor. [8] Furthermore, Wang et al. reported that the ZnO/CuO composite-based sensor exhibited a superior response to H 2 S at low operating temperature. [9] It is known that our atmosphere is surrounded by numerous kinds of natural and artificial chemical gases. Some of them are essential and some others are harmful to our life. Ammonia (NH 3) is one among the various harmful gases. NH 3 is a colorless toxic gas with a pungent smelling, and long-term exposure and inhalation to higher concentration lead to serious health problems such as laryngitis, tracheobronchitis, bronchopneumonia, and pulmonary edema. Also, the existence of NH 3 in the exhale breath of people acts as a biomarker for some disease. [10] Early detection of NH 3 is a great concern to counter the accidental threats.

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Facile Synthesis of Nano-Diced SnO2–ZnO Composite by Chemical Route for Gas Sensor Application

Cited by 19 publications

References 43 publications

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

Synthesis of Calcium Ferrite by Inherent Source for Ethanol Sensor

Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection

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Facile Synthesis of Nano-Diced SnO2–ZnO Composite by Chemical Route for Gas Sensor Application

Cited by 19 publications

References 43 publications

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

High Gas Sensitivity to Nitrogen Dioxide of Nanocomposite ZnO-SnO2 Films Activated by a Surface Electric Field

Synthesis of Calcium Ferrite by Inherent Source for Ethanol Sensor

Sputtering Power and Annealing Effects on the Properties of Zn2SnO4–SnO2 Composite Thin Film for Pungent Smelling Gas (NH3) Detection

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Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection