Novel Co3O4 nanocrystalline chain material as a high performance gas sensor at room temperature

Zhang, Xinci; Wang, Jun; Xuan, Lichun; Zhu, Zhi‐Biao; Pan, Qing‐Jiang; Shi, Keying; Guo, Zhehui

doi:10.1016/j.jallcom.2018.07.240

Cited by 33 publications

(14 citation statements)

References 36 publications

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“…1g. By referring to the XRD pattern (JCPDS PDF# 42-1467) of the standard Co3O4 sample, one can realize that the Co3O4 support was cubic in crystal structure [32,33], and the appearance of a signal at 2θ ≈ 1 o in the small-angle XRD pattern (not shown here) suggests generation of an ordered mesoporous structure in the Co3O4 support, which was synthesized using the same procedures described in our previous works [15,26]. There were no apparent differences in XRD patterns of the supported noble metal samples, indicating that the loading of noble metal NPs did not change the structure of the support and the noble metal NPs were highly dispersed on the surface of meso-Co3O4.…”

Section: Resultsmentioning

confidence: 99%

AgAuPd/meso-Co3O4: High-performance catalysts for methanol oxidation

Jun

刘雨溪

邓积光

et al. 2019

Chinese Journal of Catalysis

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Section: Resultsmentioning

confidence: 99%

AgAuPd/meso-Co3O4: High-performance catalysts for methanol oxidation

Jun

刘雨溪

邓积光

et al. 2019

Chinese Journal of Catalysis

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“…Nano-structures of this material have been obtained by many different preparation techniques and subsequently proposed as gas sensing material for different oxidizing and reducing gas (a review can be found in Xu et al [50]). Recently, it was shown that chains of nano-particles (70 nm diameter) that were obtained by a one-step thermal treatment method could be used for NO 2 detection at room temperature (response of 52%to 100 ppm NO 2 ), but the response and recovery times are rather long [51].…”

Section: Gas Sensing Modelingmentioning

confidence: 99%

Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties

Fort

Panzardi

Hjiri

et al. 2019

Sensors

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In this paper, the gas sensing properties of metal oxide nano-powder composites are studied and modeled. The gas sensing properties of mixtures of two different metal oxide nanoparticles, prepared via low-cost routes, are investigated. The responses to both an oxidizing (NO2) and a reducing gas (CO) are analyzed. The tested composites are obtained by mixing a different percentage of a p-type metal oxide, Co3O4, with moderate responses to NO2 at about 200 °C and to CO at high temperature (above 260 °C), with n-type Al-doped ZnO, which is characterized by a large but unstable response towards NO2 around 160 °C and a moderate response towards CO around 200 °C. In the oxides mixtures, p-n heterojunctions are formed by the juxtaposition of an n-type and a p-type grain in contact. Consequently, the electronic conductivity is modified and the obtained composite materials show novel characteristics with respect to the base materials. This indicates that predicting the behavior of the composites from those of their components is not possible and it suggests that the hetero-junction behavior has to be studied to understand the sensing properties of the composite materials. The obtained results indicate that the composites containing a significant amount of hetero-junctions exhibit a stable response to NO2 at room temperature and significant responses towards CO at 160 °C.

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“…Furthermore, oxygen is excellently adsorbed at p-type MOX surface at low temperature compared to n-type. Thereby p-type MOX gas sensors could potentially be used for the sensing of volatile organic compounds (VOCs) since they are highly oxidized by adsorbed oxygen at the surface compared to surface lattice oxygen [17][18][19]. Moreover, the excellent gas-sensing performances at low working temperatures in p-type MOX gas sensors have paved the interest for the detection and quantification of VOCs [16].…”

Section: Introductionmentioning

confidence: 99%

Low-Dimensional Nanostructures Based on Cobalt Oxide (Co3O4) in Chemical-Gas Sensing

Kumarage

Comini

2021

Chemosensors

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Highly sensitive, stable, low production costs, together with easy maintenance and portability, sensors are ever most demanded nowadays for monitoring and quantification of hazardous chemicals/gases in the environment. The utilization of one dimensional (1D) metal oxide nano structured chemical/gas sensors for environmental monitoring is vastly investigated because of their superior surface to volume ratio, stability, and low production costs, to provide information on the presence of chemical species. Several outstanding attempts have been pursued investigating 1D nano structures of Co3O4 over the past decades as an active material for chemical analytes detection owing to its superior catalytic effect together with its excellent stability. This article reviews the state-of-the-art of growth and characterization of Co3O4 1D nano structures and their functional characterization as chemical/gas sensors. Moreover, fundamental concepts and characteristic features, that enhance the key performances of chemical/gas sensors, are discussed. Finally, challenges and prospective for growth and fabrication of 1D Co3O4 chemical/gas sensors are discussed.

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Novel Co3O4 nanocrystalline chain material as a high performance gas sensor at room temperature

Cited by 33 publications

References 36 publications

AgAuPd/meso-Co3O4: High-performance catalysts for methanol oxidation

AgAuPd/meso-Co3O4: High-performance catalysts for methanol oxidation

Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties

Low-Dimensional Nanostructures Based on Cobalt Oxide (Co3O4) in Chemical-Gas Sensing

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