Nanostructured spinel ZnCo2O4 for the detection of LPG

Subramanian, Vijayanand; Joy, P.A.; Potdar, H.S.; Patil, D.S.; Patil, Pradip

doi:10.1016/j.snb.2010.09.001

Cited by 128 publications

(85 citation statements)

References 45 publications

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“…In comparison with previous works, our ZnCo 2 O 4 sensor fabricated on faceted nanoparticles showed a superior sensitivity toward CO (a sensitivity of ~305 in 300 ppm of CO at 300°C) than those sensors based on ZnCo 2 O 4 nanoparticles [18], hierarchical porous ZnCo 2 O 4 nano/ microspheres [19], ZnCo 2 O 4 nanotubes [20], porous ZnO/ZnCo 2 O 4 hollow spheres [21], and nanowires-assembled hierarchical ZnCo 2 O 4 microstructure [25], with sensitivities of 1 (50 ppm at 350°C), 2 (100 ppm at 175°C), 1.69 (400 ppm at 300°C), 1.1 (100 ppm at 275°C), and 29 (10 ppm at 300°C), respectively.…”

Section: Gas Sensing Application Of Znco 2 Ocontrasting

confidence: 47%

Section: Introductionmentioning

confidence: 99%

“…To date, sensor devices based on nanostructured spinel ZnCo 2 O 4 have particularly exhibited an excellent sensitivity toward liquefied petroleum gas [16][17][18], ethanol [19,20], acetone [21], Cl 2 [22], formaldehyde [23], and Xylene [24]. Additionally, several references [18][19][20][21]25] reported its poor sensitivity to carbon monoxide (CO). On the other hand, a variety of synthesis methods have been developed on the preparation of ZnCo 2 O 4 such as combustion [7], thermal decomposition [17], co-precipitation/digestion [18], W/O microemulsion [22], hydrothermal [9,14], sol-gel [26], and surfactant-mediated method [27].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, several references [18][19][20][21]25] reported its poor sensitivity to carbon monoxide (CO). On the other hand, a variety of synthesis methods have been developed on the preparation of ZnCo 2 O 4 such as combustion [7], thermal decomposition [17], co-precipitation/digestion [18], W/O microemulsion [22], hydrothermal [9,14], sol-gel [26], and surfactant-mediated method [27]. Recently, the colloidal route assisted by microwave radiation has provided an efficient and low cost synthesis method to obtain different types of nanostructured materials [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis Characterization of Nanostructured ZnCo2O4 with High Sensitivity to CO Gas

Morán-Lázaro¹,

López–Urías²,

Sandoval³

et al. 2017

Nanostructured Materials - Fabrication to Applications

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In this work, nanostructured ZnCo 2 O 4 was synthesized via a microwave-assisted colloidal method, and its application as gas sensor for the detection of CO was studied. Typical diffraction peaks corresponding to the cubic ZnCo 2 O 4 spinel structure were identified at calcination temperature of 500°C by X-ray powder diffraction. A high degree of porosity in the surface of the nanostructured powder of ZnCo 2 O 4 was observed by scanning electron microscopy and transmission electron microscopy, faceted nanoparticles with a pockmarked structure were clearly identified. The estimated average particle size was approximately 75 nm. The formation of ZnCo 2 O 4 material was also confirmed by Raman characterization. Pellets fabricated with nanostructured powder of ZnCo 2 O 4 were tested as sensors using CO gas at different concentrations and temperatures. A high sensitivity value of 305-300 ppm of CO was measured at 300°C, indicating that nanostructured ZnCo 2 O 4 had a high performance in the detection of CO.

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Section: Gas Sensing Application Of Znco 2 Ocontrasting

confidence: 47%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis Characterization of Nanostructured ZnCo2O4 with High Sensitivity to CO Gas

Morán-Lázaro¹,

López–Urías²,

Sandoval³

et al. 2017

Nanostructured Materials - Fabrication to Applications

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“…The fabrication of the yolk-shelled structure is mainly based on the heterogeneous contraction caused by the non-equilibrium heat treatment process during the thermal decomposition of ZnCo-glycolate [27]. [28]. The Co 2p XPS spectrum in Figure 6(c) consists of two main lines (2p 3/2 at ~780.6 eV and 2p 1/2 at ~795.7 eV) with the spin-orbit splitting of ~15.1 eV, in accordance with the data reported in the literatures [29,30].…”

Section: Resultsmentioning

confidence: 99%

Simple synthesis of yolk-shelled ZnCo2O4 microspheres towards enhancing the electrochemical performance of lithium-ion batteries in conjunction with a sodium carboxymethyl cellulose binder

et al. 2013

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Mixed metal oxides have been attracting more and more attention recently because of their advantages and superiorities, which can improve the electrochemical performance of single metal oxides. These advantages include structural stability, good electronic conductivity, and reversible capacity. In this work, uniform yolk-shelled ZnCo 2 O 4 microspheres were synthesized by pyrolysis of ZnCo-glycolate microsphere precursors which were prepared via a simple refluxing route without any precipitant or surfactant. The formation process of the yolk-shelled microsphere structure during the thermal decomposition of ZnCoglycolate is discussed, which is mainly based on the heterogeneous contraction caused by nonequilibrium heat treatment. The performances of the as-prepared ZnCo 2 O 4 electrodes using sodium carboxylmethyl cellulose (CMC) and poly-vinylidene fluoride (PVDF) as binders are also compared.Constant current and rate charge-discharge testing results demonstrated that the ZnCo 2 O 4 electrodes using CMC as the binder had better performance than those using PVDF as the binder. It was worth pointing out that the electrode using CMC as the binder nicely yields a discharge capacity of 331 mA h g À1 after 500 cycles at a current density of 1000 mA g À1 , which is close to the theoretical value of graphite (371 mA h g À1 ). Furthermore, the obtained synthetic insights on the complex hollow structures will be of benefit to the design of other anode materials for lithium ion batteries.

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Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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With rapid progress in device integration and computing power, the realization of highly miniaturized one-chip artificial olfaction with superior performance is close and should be further supported by the rational design of chemical sensors and chemical sensing materials. The number of gas sensors tends to increase in order to sniff more complex odors with the progress of civilization. This explains the evolution from a single chemical sensor to complicated artificial olfaction using sensor arrays. At the advent of oxide chemiresistive gas sensors in the 1960s and 1970s, a single gas sensor was widely used to detect toxic, explosive, dangerous, and harmful gases, such as CO, C 3 H 8 , CH 4 , H 2 S, and NO 2 , in a selective manner. [26,27] However, a single sensor is often insufficient for recognizing most of the natural odors encountered in daily life, which consist of hundreds to thousands of different chemicals. [28] In the mammalian olfactory system, odorants are initially detected by olfactory receptors (ORs) covering the surface of the cilia projected from olfactory sensory neurons (OSNs), which are located in the olfactory epithelium lining the nasal cavity. These signals are transmitted to the glomeruli in the olfactory bulb, where a high degree of signal integration happens (Figure 1a). [29] Finally, the signals are sent through mitral cells to a higher brain region (olfactory cortex), and the signals are subsequently combined or modified in a variety of ways by parallel processing for analysis and interpretation (Figure 1b). [30] Each OR can detect various kinds of odorants, and similarly, each odorant can also be recognized by a number of ORs. That is, the olfactory system determines multiple odorants from various combinations of ORs (Figure 1c). [31] For better olfaction, both OSNs and ORs should be abundant. A larger number of OSNs is advantageous for detecting trace concentrations of analytes and ligands. [32] For instance, dogs with more OSNs are better than humans at detecting explosives, searching and rescuing, diagnosing disease, and assessing agricultural products. [33] If a mammal can detect larger numbers of faint gas components within odors, he can perceive and identify the odors more accurately. From this perspective, gas sensors with lower detection limits would be assembled to the stronger artificial olfaction. Kinds of ORs are also important. Mammals are known to have ≈1000 different kinds of ORs, and combinations of dissimilar ORs enable the discrimination of a myriad of odorants. [29] To mimic this, sensor arrays consisting of small number (5-20) of sensors that show Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machinelearning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable onc...

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Nanostructured spinel ZnCo2O4 for the detection of LPG

Cited by 128 publications

References 45 publications

Synthesis Characterization of Nanostructured ZnCo2O4 with High Sensitivity to CO Gas

Synthesis Characterization of Nanostructured ZnCo2O4 with High Sensitivity to CO Gas

Simple synthesis of yolk-shelled ZnCo2O4 microspheres towards enhancing the electrochemical performance of lithium-ion batteries in conjunction with a sodium carboxymethyl cellulose binder

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

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