Zinc oxide based gas sensors and their derivatives: a critical review

Kurugundla, Gopi Krishna; Godavarti, Umadevi; Saidireddy, P.; Nagaraju, P.

doi:10.1039/d2tc04690c

Cited by 52 publications

(13 citation statements)

References 192 publications

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“…A heterojunction interface that is formed by incorporating two or more nanomaterials can have significant effects on the performance of the sensor. [24][25][26][27] In the present study, we synthesized Iron loaded Indium zinc oxide NC heterostructure for gas sensing study. There are certain prerequisites for a good sensor-Selectivity, Sensitivity and Stability.…”

Section: Resultsmentioning

confidence: 99%

Optimizing Gas Sensing Properties of Fe-Loaded Indium Zinc Oxide Nanocomposite for Efficient Detection of Ammonia Gas

Krishna,

Parne,

Nagaraju

2023

ECS J. Solid State Sci. Technol.

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The current study delineates the role of gas sensing properties of Fe-IZO (Iron loaded Indium Zinc oxide) a mixed metal oxide nanocomposite. The heterostructured Fe-IZO nanocomposite (NC) was synthesized via the facile co-precipitation method. The Fe-IZO NC was characterized by various experimental techniques and the results attained allowed us to suggest the mechanism for considering the connection between morphological variations and gas-sensing characteristics of Fe-IZO NC. One of the cutting-edge circumstances now-a-days is the prime use of gas sensors for environmental applications. The NC has a good selectivity for NH3 gas that has shown good stability up to 80 d. The response time (ℸres) is 64 s, recovery time (ℸrec) is 72 s for 50 ppm (parts per million) and obtained a highest response of 87% at room temperature. The Fe-IZO NC heterostructure with efficient charge transfer can enable the subsequent reaction mechanism with NH3 gas and the adsorbed oxygen ions leading to an increased response. Consequently, the results attained in this work has shown that the synthesized heterostructured NC sensor is suitable for room temperature NH3 sensing with high performance.

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Section: Resultsmentioning

confidence: 99%

Optimizing Gas Sensing Properties of Fe-Loaded Indium Zinc Oxide Nanocomposite for Efficient Detection of Ammonia Gas

Krishna,

Parne,

Nagaraju

2023

ECS J. Solid State Sci. Technol.

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“…These combined effects are due to the The ZCCO sensor surface promotes adsorption and dissociation of atmospheric oxygen molecules into atomic species due to the presence of Zn 2+ , Cd 3+ , Cu 2+ ions. The oxygen molecules on the ZCCO surface then ionize into oxygen species by capturing electrons from the conduction band [36][37][38]. Therefore, the sensitization of nanocomposite sensor increases the quantity of oxygen species and accelerates the surface reaction, causing an enlargement of the depletion layer followed by a higher baseline resistance.…”

Section: The Superior Sensing Study Of Zcco Ternary Mox Nc Sensormentioning

confidence: 99%

Low cost ternary metal oxide based nanocomposites as a room temperature formaldehyde sensor

Krishna,

Parne,

Pothukanuri

2023

Phys. Scr.

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To protect human health from hazardous gases, it is necessary to rapid detection of toxic gases utilizing gas sensors. Though there are various gas sensors, despite that, they endure inaccuracy in selectivity and sensitivity in the real-time monitoring of the low concentration of gases. In this context, the practical design for developing a cost-effective formaldehyde (HCHO) sensor using a hetero-type ternary nanocomposite ZnO/CdO/CuO (ZCCO) metal oxide (MOX) materials with porous structure is an ideal choice. In this study, ZCCO heterostructures demonstrated rapid selectivity towards HCHO compared with other volatile organic compounds and exhibited excellent long-term stability for up to 80 days. The sensor capability has been further improved with the heterostructures' porous morphology, greater specific surface area, huge reaction sites, and electron sensitization effects of highly dispersed nanocomposite material. This work reports the Lowest Detection Limit (LDL) towards HCHO at room temperature as 500 ppb. These heterostructures enable the charge transport mechanism between the interparticle ZnO/CdO (n–n junctions) and the ZnO/CuO (n–p junctions) that can simultaneously enhance the sensitivity of the gas molecule's reactions.

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“…In recent years, researchers have been seeking different gas-sensing materials theoretically and experimentally for improving the selectivity and sensitivity of gas sensors. − Traditional metal oxide sensors have disadvantages such as poor selectivity, high energy consumption, and unfriendly to the environment. , The two-dimensional materials are naturally characterized by large areas, ultrahigh carrier mobilities, and rich surface active sites and have attracted great interest. − The application of two-dimensional materials in gas sensors may make up for the shortcomings of traditional metal oxide sensors and promote greatly the development of gas sensors. − Graphene, silicene, phosphorene, and MoS 2 have been studied for their gas-sensing properties, and some prospective results have been obtained. − However, the adsorption of some typical gases, such as CO and CO 2 on those materials is weak, and the interactions between their surfaces and various gases are usually not enough to ensure stable adsorption conditions. To handle this issue, methods like doping other atoms, introducing defects in suitable locations, molecular group functionalizing, and other modification techniques have been proposed. − Transition metal (TM) doping is one of the most widely used methods in gas sensing technology.…”

Section: Introductionmentioning

confidence: 99%

Metal (Ni, Pd, and Pt)-Doped BS Monolayers as a Gas Sensor upon Vented Gases in Lithium-Ion Batteries: A First-Principles Study

Li,

Wang

2024

Langmuir

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Real-time monitoring of the vented gases emitted by the thermal runaway of lithium-ion batteries (LIBs) is of great significance to the normal use of LIBs. We study systematically the adsorption and sensing performances of pristine and metal-doped BS monolayers to five typical gases (CO, CO 2 , CH 4 , C 2 H 2 , and C 2 H 4 ) emitted from LIBs employing the first-principles method. The adsorption structure and energetics, charge transfer, band structure, density of states, sensitivity, and recovery time are simulated and analyzed. Outstanding sensing properties are predicted for the Ni-, Pd-, and Pt-doped BS monolayers, although their recently synthesized pristine counterpart shows little sensing potential for those gases. The magnitude of the adsorption energy increases from 0.249 eV to 2.32 eV (Ni-BS), 1.954 eV(Pd-BS), and 2.994 eV (Pt-BS) for the CO gas after doping. Besides, significant variation of band gap is observed after gas adsorption in doped BS nanosheets, which leads to huge theoretical values of the sensitivity. The sensitivity for CO,

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Zinc oxide based gas sensors and their derivatives: a critical review

Abstract: The most extensively explored gas sensors are metal oxide semiconductor materials owing to their high selectivity, stability and cost-effective, simple synthesis technique. Despite these characteristics, they can operate at low...

Cited by 52 publications

References 192 publications

Optimizing Gas Sensing Properties of Fe-Loaded Indium Zinc Oxide Nanocomposite for Efficient Detection of Ammonia Gas

Optimizing Gas Sensing Properties of Fe-Loaded Indium Zinc Oxide Nanocomposite for Efficient Detection of Ammonia Gas

Low cost ternary metal oxide based nanocomposites as a room temperature formaldehyde sensor

Metal (Ni, Pd, and Pt)-Doped BS Monolayers as a Gas Sensor upon Vented Gases in Lithium-Ion Batteries: A First-Principles Study

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