CeO2/ionic liquid hybrid materials with enhanced humidity performance

Xie, Weixin; Duan, Xiaochuan; Jiwei, Deng; Nie, Jianxia; Wang, Taihong

doi:10.1016/j.snb.2017.06.093

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…Over the past several decades, metal oxide semiconductor (MOS) based gas sensors have received much research interest because of their superiorities of low cost, easy fabrication, and fast response and recovery speed [5]. Now, various MOSs, such as ZnO [6], SnO 2 [7], Fe 2 O 3 [8], In 2 O 3 [9], WO 3 [10,11], TiO 2 [12], Co 3 O 4 [13], SnS 2 [14], and CeO 2 [15], have been developed as active materials for gas detection. However, as compared with the abundant research on the gas sensing properties of MOS for volatile organic compounds’ (VOCs) detection, the reports on the design and preparation of MOS nanomaterials for CH 4 detection are relatively rare.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Sun

et al. 2019

Nanomaterials

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In this paper, a hierarchical structure of graphite carbon nitride (g-C3N4) modified ZnO (g-C3N4/ZnO) was synthesized using a simple precipitation-calcination method. Through this method, g-C3N4 nanosheets with a controlled content were successfully decorated on the petals of flower-like ZnO. Various techniques were used to confirm the successful formation of the g-C3N4/ZnO hierarchical structure. The methane (CH4) sensing properties of g-C3N4/ZnO sensor were investigated. The result exhibited that after decorating ZnO with g-C3N4, the CH4 sensing performances of the fabricated sensor were remarkably improved. At the optimum operating temperature of 320 °C, the response of the sensor fabricated with CNZ-3 (the sample with an optimum content of g-C3N4) towards 1000 ppm CH4 was as high as 11.9 (Ra/Rg), which was about 2.2 times higher than that of the pure ZnO sensor (5.3). In addition, the CNZ-3 sensor also exhibited a fast response/recovery speed (15/28 s) and outstanding long-term stability. The enhancing CH4 sensing mechanism may be contributed to enlarged surface area, pore structure, and g-C3N4-ZnO n-n junction.

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Section: Introductionmentioning

confidence: 99%

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Sun

et al. 2019

Nanomaterials

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“…As many literatures shown, among various metal oxides, SnO 2 exhibited the most distinguished ability of fast detection of water vapor. [ 191–197 ] For example, Feng et al. prepared 3D hierarchical SnO 2 dodecahedral nanocrystals (DNCs).…”

Section: Application Of Gas Sensor Based On Hierarchical Metal Oxidesmentioning

confidence: 99%

“…Wang and co‐workers reported the preparation of CeO 2 /ionic liquid hybrid and used it as the humidity sensing material. [ 197 ] Through the humidity sensing tests, it was found that the CeO 2 /ionic liquid hybrid based humidity sensor showed fast response (4 s) and recovery time (1 s) to humidity. The fast response and recovery speed of the CeO 2 /ionic liquid hybrid was closely related to two factors: 1) the inherent sensitivity of the CeO 2 to humidity, and 2) the crucial and positive role of the ionic liquid played in the diffusion of water molecules and the transfer of charge carriers.…”

Section: Application Of Gas Sensor Based On Hierarchical Metal Oxidesmentioning

confidence: 99%

“…As many literatures shown, among various metal oxides, SnO 2 exhibited the most distinguished ability of fast detection of water vapor. [191][192][193][194][195][196][197] For example, Feng et al prepared 3D hierarchical SnO 2 dodecahedral nanocrystals (DNCs). [191] They reported the penetration and diffusion of H 2 O molecules were promoted in the open 3D nanostructures (Figure 4c,f).…”

Section: The Excellent Humidity Sensing Performance Of Hierarchical M...mentioning

confidence: 99%

“…On the other hand, the CeO 2 and TiO 2 based humidity sensor also displayed fast response to water vapor, and then could be the promising humidity sensing materials for fabricating breathing sensors. [196][197][198][199][200][201][202] Tomer and co-workers reported one-pot synthesis of CeO 2 nanoparticles by aerogel based method. [196] The obtained CeO 2 nanoparticles were spherical and composed of smaller spherical nanoparticles with the particle size 3-5 nm.…”

Section: The Excellent Humidity Sensing Performance Of Hierarchical M...mentioning

confidence: 99%

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Recent Development of Hierarchical Metal Oxides Based Gas Sensors: From Gas Sensing Performance to Applications

Hou

Guo

Zhang

et al. 2022

Advanced Sustainable Systems

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applied in various fields including mining, aviation, medical diagnostics, food safety, automobile industry, indoor air quality monitoring, and environmental pollution control, etc. [1][2][3][4][5][6][7] Among them, due to the close relationship with human health, the applications of gas sensors in indoor air quality monitoring, breath analysis, and food safety have received wide attentions. [8][9][10] Conventionally, several

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Boosting Dimethyl Carbonate Production from CO₂ and Methanol using Ceria‐Ionic Liquid Catalyst

Asare‐Bediako,

Li,

Houston

et al. 2024

ChemSusChem

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As a crucial strategy towards a sustainable chemical industry, the direct synthesis of dimethyl carbonate (DMC) from renewable carbon dioxide (CO2) and methanol (MeOH) is studied, using CeO2 nanoparticles modified with 1‐butyl‐3‐methylimidazolium hydrogen carbonate ([BMIm][HCO3]) devoid of stoichiometric dehydrating agents. The synthesized CeO2@[BMIm][HCO3] catalyst having high thermal stability harnesses the unique physicochemical properties of CeO2 and the ionic liquid to exhibit a DMC yield of 10.4% and a methanol conversion of 16.1 % at optimal conditions (pressure of CO2 = 5 MPa; temperature = 130 °C). The catalytic behavior of CeO2@[BMIm][HCO3] studied with a detailed XRD, XPS, CO2 and NH3‐TPD, Raman spectroscopy, TGA, FTIR, SEM and TEM suggests that the synergy between the two catalytic components originating from an increased surface oxygen vacancies boosts the overall catalytic performance. After several recycling tests, the catalyst demonstrated no significant reduction in DMC yield and methanol conversion. This platform is an attractive approach to synthesize thermally stable nanoparticle@ionic liquid that retains and merges the physical attributes of both materials for producing useful bulk chemicals from readily available chemical resources.

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CeO2/ionic liquid hybrid materials with enhanced humidity performance

Cited by 12 publications

References 42 publications

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Recent Development of Hierarchical Metal Oxides Based Gas Sensors: From Gas Sensing Performance to Applications

Boosting Dimethyl Carbonate Production from CO₂ and Methanol using Ceria‐Ionic Liquid Catalyst

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CeO2/ionic liquid hybrid materials with enhanced humidity performance

Cited by 12 publications

References 42 publications

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Synthesis of a Flower-Like g-C3N4/ZnO Hierarchical Structure with Improved CH4 Sensing Properties

Recent Development of Hierarchical Metal Oxides Based Gas Sensors: From Gas Sensing Performance to Applications

Boosting Dimethyl Carbonate Production from CO2 and Methanol using Ceria‐Ionic Liquid Catalyst

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Boosting Dimethyl Carbonate Production from CO₂ and Methanol using Ceria‐Ionic Liquid Catalyst