Room temperature LPG sensing properties using spray pyrolysis deposited nano-crystalline CdO thin films

Nakate, Umesh T.; Patil, Pramila; Ghule, Balaji G.; Nakate, Yogesh T.; Ekar, Satish; Ambare, R.C.; Mane, Rajaram S.

doi:10.1016/j.surfin.2019.100339

Cited by 31 publications

(8 citation statements)

References 23 publications

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Section: Introductionmentioning

confidence: 99%

“…MOX-based NPs require low manufacturing cost, easy processing, chemical stability, and good electrical properties. Various examples of MOX explored as chemiresistors include CdO, 14,15 In 2 O 3 , 16,17 Fe 2 O 3 , 18,19 WO 3 , 20,21 SnO 2 , 22−24 CuO, 25,26 TeO 2 , 27 MoO 3 , 28, 29 and ZnO. 30,31 Among diverse MOX chemiresistors, ZnO is frequently employed in gas sensing devices for leak detection of gases.…”

Section: Introductionmentioning

confidence: 99%

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A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

Yadav

Kumar

Chaudhary

et al. 2023

Ind. Eng. Chem. Res.

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Chemiresistors have been widely employed in monitoring toxic fumes, gases, and environmental pollutants. Among a plethora of metal oxide semiconductors (MOX) used for preparing chemiresistors, zinc oxide is the topmost candidate. ZnO-based gas sensors are cost-effective, nontoxic, stable, and easily prepared by wet chemical facile approaches. ZnO nanostructures are the most promising candidates for leakage detection of toxic gases with reliable performance. In this regard, several investigations have been carried out to increase sensor response at room temperature (RT). Current advances in ZnO nanostructures-based thin films are the subject of this review paper. The review begins with a basic survey of ZnO thin films for gas sensors focusing on how the structure and properties of ZnO affect the gas response mechanisms, various factors and processing methods of ZnO nanostructures, and possible ways to enhance the gas response characteristics of ZnO-based sensors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

Yadav

Kumar

Chaudhary

et al. 2023

Ind. Eng. Chem. Res.

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show abstract

“…Among these, it has been discovered that nanostructured metal oxides are good candidates for detecting oxygenated volatile organic molecules (OVOCs). Metal oxides such as ZnO, WO 3 , TiO 2 , CuO, CdO, SnO 2 , and NiO have been successfully explored for solid‐state gas sensor applications [10–16] . Due to its straightforward manufacturing processes, low cost, non‐toxicity, excellent thermal stability, and adaptability for doping, ZnO (n‐type) with a band gap of 3.3 eV is a versatile semiconducting material [17–22] .…”

Section: Introductionmentioning

confidence: 99%

“…Metal oxides such as ZnO, WO 3 , TiO 2 , CuO, CdO, SnO 2 , and NiO have been successfully explored for solidstate gas sensor applications. [10][11][12][13][14][15][16] Due to its straightforward manufacturing processes, low cost, non-toxicity, excellent thermal stability, and adaptability for doping, ZnO (n-type) with a band gap of 3.3 eV is a versatile semiconducting material. [17][18][19][20][21][22] However, the responsiveness and selectivity of the monolithic metal oxide gas sensor are constrained.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Acetaldehyde Sensing Performance of Spherical Shaped Copper Doped ZnO Nanostructures

Rodrigues

Borge

Jain³

et al. 2023

ChemistrySelect

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Spherical shape copper (Cu) doped ZnO nanostructures of various amount (3, 6, 9 and 12 %) were synthesized. The XRD, FTIR, UV‐Visible, HR‐TEM, FESEM, EDS, SAED and XPS were done to understand the structural, optical, morphology and shape of Cu doped ZnO nanostructures. To achieve the best gas reaction, doping concentration was optimized. ZnO and Cu doped ZnO nanostructures were exposed to various oxygenated volatile organic compounds (OVOCs) and found to be more selective towards acetaldehyde sensing. For 50 ppm acetaldehyde gas, temperature study was done at various temperatures (RT, 50, 100, 150, 200 °C) which showed optimal at 100°C for maximal gas response. The response and recovery time was 16.53 and 18.36 seconds for 50 ppm of acetaldehyde gas. The gas sensing study was carried out at different humidity rates (11, 32, 51, 63 and 84 %) using different saturated solutions. 9 % Cu doped ZnO shows maximum response (61.53 %) as compared to pure ZnO and 3, 6 and 12 % Cu doped ZnO. The spherical shape Cu doped ZnO sensing response was increases with increase in concentration of gas from 10 to 300 ppm. Acetaldehyde gas shows enhanced selectivity towards spherical shape Cu doped ZnO sensors as compared to the other OVOCs like acetone, ethyl methyl ketone, methanol, ethanol, n‐propanol, n‐butanol, formaldehyde, acetaldehyde, propionaldehyde and acrolein. The reproducibility of Cu doped ZnO was studied for 50 days. Also, after acetaldehyde gas sensing change in morphology study of sensor was done.

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“…Therefore, lots of research activities have been performed in an effort to this end. For example, different methods have been employed to fabricate porous/nanostructured sensing materials − or deposit thin films of sensing materials. − Another key factor affecting humidity performances is the composition. Great efforts have been devoted to exploring highly sensitive materials.…”

mentioning

confidence: 99%

TiO₂/(K,Na)NbO₃ Nanocomposite for Boosting Humidity-Sensing Performances

Xie

et al. 2020

ACS Sens.

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Nanomaterials of TiO 2 , (K 0.5 Na 0.5 )NbO 3 , and the TiO 2 / (K 0.5 Na 0.5 )NbO 3 nanocomposite were successfully synthesized by a hydrothermal method. Impedance-type humidity sensors were fabricated based on these materials. Our results reveal that the impedance of the TiO 2 /(K 0.5 Na 0.5 )NbO 3 sensor changes by 5 orders of magnitude with an ultrahigh sensing response of S f = 166 470 recorded at 100 Hz in the tested relative humidity (RH) range of 12− 94%. This value is almost 2 and 4 orders of magnitude larger than that of the (K 0.5 Na 0.5 )NbO 3 and TiO 2 sensors, respectively. Interestingly, satisfactory response/recovery time (25/38 s, within 5 min), very small hysteresis (<5%), excellent stability, and good repeatability were also achieved in the TiO 2 / (K 0.5 Na 0.5 )NbO 3 sensor. The improved sensing properties are ascribed to the synergistic effect of TiO 2 /(K 0.5 Na 0.5 )NbO 3 heterojunction, which contributes the impedance that is susceptible to environmental humidity. This work underscores that it is a facile way to boost humidity-sensing performance by constructing proper nanocomposites.

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Room temperature LPG sensing properties using spray pyrolysis deposited nano-crystalline CdO thin films

Cited by 31 publications

References 23 publications

A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

Enhanced Acetaldehyde Sensing Performance of Spherical Shaped Copper Doped ZnO Nanostructures

TiO₂/(K,Na)NbO₃ Nanocomposite for Boosting Humidity-Sensing Performances

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Room temperature LPG sensing properties using spray pyrolysis deposited nano-crystalline CdO thin films

Cited by 31 publications

References 23 publications

A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

A Review on Chemiresistive Hybrid Zinc Oxide and Nanocomposites for Gas Sensing

Enhanced Acetaldehyde Sensing Performance of Spherical Shaped Copper Doped ZnO Nanostructures

TiO2/(K,Na)NbO3 Nanocomposite for Boosting Humidity-Sensing Performances

Contact Info

Product

Resources

About

TiO₂/(K,Na)NbO₃ Nanocomposite for Boosting Humidity-Sensing Performances