Enhanced sensing performance to toluene and xylene by constructing NiGa2O4-NiO heterostructures

Chen, Hui; Ao, Saren; Li, Guo-Dong; Gao, Qian; Zou, Xiaoxin; Wei, Cundi

doi:10.1016/j.snb.2018.11.072

Cited by 60 publications

(13 citation statements)

References 51 publications

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“…9). Our NiFe 2 O 4 -based sensor to toluene sensing is comparable to that of previous reports based on p-type sensing materials with unique morphologies and microstructures, as summarized in Table 1 [33][34][35][36][37][38][39][40].…”

Section: Gas-sensing Propertiessupporting

confidence: 83%

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

et al. 2020

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The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique materials. Here, hierarchical flower-like NiFe 2 O 4 with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH 4 F. The controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH 4 F. The flower-like NiFe 2 O 4 sensor exhibited outstanding sensitivity of 19.95 to 100 9 10 -6 toluene with low detection limit (1 9 10 -6 ). Furthermore, the sensor showed superior sensing selectivity and longterm stability to toluene. The excellent sensing properties could largely arise from a combination of high surface area, numerous active sites, porous structures, and the native catalytic characteristics of NiFe 2 O 4 to facilitate toluene molecules adsorption, diffusion, and reaction.

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Section: Gas-sensing Propertiessupporting

confidence: 83%

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

et al. 2020

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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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“…[17][18][19] Considering the intrinsic low response of p-type semiconductor oxides, researchers are in pursuit of well-designed nickel-based oxides with optimized surface chemisorption and sensing properties for great detection performance. [20][21][22][23] Typically, the sensing mechanism of oxide semiconductors is dominated by the surface sensing reaction between absorbed oxygen molecules and the targeted gas (e.g., xylene), which changes the carrier concentration and resistance of the semiconductor. [24][25][26] The sensing performances are regulated by both the nanostructures and electronic properties of the sensing materials.…”

Section: Introductionmentioning

confidence: 99%

Electronic and morphological dual modulation of NiO by indium-doping for highly improved xylene sensing

Zhang

Liang

et al. 2022

New J. Chem.

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Enhanced sensing performance to toluene and xylene by constructing NiGa2O4-NiO heterostructures

Cited by 60 publications

References 51 publications

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

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

Electronic and morphological dual modulation of NiO by indium-doping for highly improved xylene sensing

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