Highly selective and sensitive xylene gas sensor fabricated from NiO/NiCr2O4 p-p nanoparticles

Gao, Hongyu; Guo, Jie; Li, Yiwen; Xie, Changlin; Li, Xiao; Liu, Long; Chen, Yi; Sun, Peng; Liu, Fangmeng; Yan, Xu; Liu, Fengmin; Lu, Geyu

doi:10.1016/j.snb.2018.12.152

Cited by 124 publications

(27 citation statements)

References 62 publications

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“…The results in the literature to enhance/modify the gas response and/or selectivity using oxide–oxide heterostructures or heterocomposites are summarized in Table 3 . [ 214,216,223–327 ] The tailoring of gas sensing characteristics by the loading/doping of noble metal catalysts such as Pt, Pd, Au, Ag, and Rh on oxide semiconductors was not investigated in this review because it has been intensively studied before. [ 328–338 ]…”

Section: Oxide–oxide Heterostructures and Heterocompositesmentioning

confidence: 99%

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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Section: Oxide–oxide Heterostructures and Heterocompositesmentioning

confidence: 99%

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

2020

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“…Gao et al [2] prepared tin doped nickel oxide nanostructure and have shown response time of ~298 s and recovery time of ~223 s, respectively, for 100 ppm xylene at 225 0 C. Gao et al [15] fabricated a NiO/NiCr2O4 composite having response (~1217 s) and recovery times (~591 s) for 100 ppm at 225 0 C. Similarly, Qiu et. al [16] also prepared a composite of NiO/ZrO2 and have shown response (~240 s) and recovery times (~98 s) for 100 ppm at 330 0 C. A complete description of sensing parameters for doped and composite based xylene sensors are compared with present work and these are displayed in Table 1.…”

Section: Ramanmentioning

confidence: 94%

Xylene sensing using Dy-doped NiO nanoparticles

Shailja

Singh

Sharma

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Present work reports structural and xylene sensing properties of Dy-doped NiO nanoparticles. The samples were prepared using co-precipitation method. XRD pattern reveals incorporation of dysprosium into the host lattice of nickel oxide. SEM images shows the change in morphology from micro-rods to nanoparticles on doping nickel oxide with dysprosium. Raman spectrum reveals the presence of nickel vacancies which serve as adsorption sites for xylene and hence, improves the sensing performance of doped NiO. Doping with dysprosium has not only improved the sensitivity but also enhanced its selectivity towards xylene when tested against ammonia, benzene, ethanol and acetone at 200 °C. Dysprosium doped device has shown sensor response of 7.4 and response (recovery) time of 50 s (36 s), respectively. Our dysprosium doped sensor show improvement in the response and recovery times of already reported xylene sensing devices employing nickel oxide.

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“…Therefore, the gas sensor response of the p-NiO-decorated p-CuO microspheres was highly improved towards reducing gases. The enhanced gas sensing mechanisms of p-NiO/p-NiCr 2 O 4 nanocomposites [ 132 ] or the Cr 2 O 3 -Co 3 O 4 nanofibres [ 133 ] to xylene or C 2 H 5 OH can also be explained by the above discussions.…”

Section: Enhanced Gas Sensing Mechanisms Of the Metal Oxide Heterojunctionsmentioning

confidence: 99%

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

et al. 2021

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The construction of heterojunctions has been widely applied to improve the gas sensing performance of composites composed of nanostructured metal oxides. This review summarises the recent progress on assembly methods and gas sensing behaviours of sensors based on nanostructured metal oxide heterojunctions. Various methods, including the hydrothermal method, electrospinning and chemical vapour deposition, have been successfully employed to establish metal oxide heterojunctions in the sensing materials. The sensors composed with the built nanostructured heterojunctions were found to show enhanced gas sensing performance with higher sensor responses and shorter response times to the targeted reducing or oxidising gases compare with those of the pure metal oxides. Moreover, the enhanced gas sensing mechanisms of the metal oxide-based heterojunctions to the reducing or oxidising gases are also discussed, with the main emphasis on the important role of the potential barrier on the accumulation layer.

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Highly selective and sensitive xylene gas sensor fabricated from NiO/NiCr2O4 p-p nanoparticles

Cited by 124 publications

References 62 publications

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

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

Xylene sensing using Dy-doped NiO nanoparticles

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

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