CuO/V2O5 hybrid nanowires for highly sensitive and selective H2S gas sensor

Yeh, Bu-Yu; Jian, Bo-Sung; Wang, Gou‐Jen; Tseng, Wenjea J.

doi:10.1039/c7ra06657k

Cited by 18 publications

(6 citation statements)

References 23 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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“…The H 2 S sensing performance of a p-n junction based on Co 3 O 4 -SnO 2 nanocomposite was improved with an increase in the structure annealing temperature [79]. CuO/V 2 O 5 hybrid nanowires showed a better response towards H 2 S when compared with the pristine V 2 O 5 nanowires [78].…”

Section: Food Quality Controlmentioning

confidence: 99%

“…The detection of H 2 S can give useful information to identify the overcooked and rotten food [74]. Various oxide materials and their compositions have been studied for the fabrication of H 2 S sensors [75][76][77][78][79][80][81][82][83][84]. Porous metal oxide nanostructures, such as TiO 2 , NiO, and CuO are very attractive materials for H 2 S detection [75][76][77]85].…”

Section: Food Quality Controlmentioning

confidence: 99%

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

et al. 2018

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Metal oxide materials have been applied in different fields due to their excellent functional properties. Metal oxides nanostructuration, preparation with the various morphologies, and their coupling with other structures enhance the unique properties of the materials and open new perspectives for their application in the food industry. Chemical gas sensors that are based on semiconducting metal oxide materials can detect the presence of toxins and volatile organic compounds that are produced in food products due to their spoilage and hazardous processes that may take place during the food aging and transportation. Metal oxide nanomaterials can be used in food processing, packaging, and the preservation industry as well. Moreover, the metal oxide-based nanocomposite structures can provide many advantageous features to the final food packaging material, such as antimicrobial activity, enzyme immobilization, oxygen scavenging, mechanical strength, increasing the stability and the shelf life of food, and securing the food against humidity, temperature, and other physiological factors. In this paper, we review the most recent achievements on the synthesis of metal oxide-based nanostructures and their applications in food quality monitoring and active and intelligent packaging.

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“…Furthermore, the unique tube-like architectures contain numerous tiny nanoparticles on the surface, which facilitates the rapid adsorption/diffusion of the gas molecules and results in several dynamic sites among the H 2 S and adsorbed oxygen atoms. Yeh et al [70] Commonly, gas sensors constructed with metal oxides work at higher temperatures (200-500 • C). Therefore, owing to the higher energy consumption, it is difficult to integrate them into electronic devices.…”

Section: Cu X O Nanocomposite-based Gas Sensorsmentioning

confidence: 99%

CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

et al. 2021

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H2S gas is a toxic and hazardous byproduct of the oil and gas industries. It paralyzes the olfactory nerves, with concentrations above 100 ppm, resulting in loss of smell; prolonged inhalation may even cause death. One of the most important semiconducting metal oxides for the detection of H2S is CuxO (x = 1, 2), which is converted to CuxS upon exposure to H2S, leading to a remarkable modulation in the resistance and appearance of an electrical sensing signal. In this review, various morphologies of CuxO in the pristine form, composites of CuxO with other materials, and decoration/doping of noble metals on CuxO nanostructures for the reliable detection of H2S gas are thoroughly discussed. With an emphasis to the detection mechanism of CuxO-based gas sensors, this review presents findings that are of considerable value as a reference.

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CuO/V₂O₅ hybrid nanowires for highly sensitive and selective H₂S gas sensor

Cited by 18 publications

References 23 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

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

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