Synthesis and gas sensing application of porous CeO 2 –ZnO hollow fibers using cotton as biotemplates

Yan, Shaohui; Ma, S.Y.; Xu, Xiaoli; Lü, Yan; Bian, Haiqin; Liang, Xiyin; Jin, Wei; Yang, H.M.

doi:10.1016/j.matlet.2015.11.095

Cited by 31 publications

(13 citation statements)

References 22 publications

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“…The biotemplate nature strongly influences the structure and porosity of the synthesized oxide. A variety of biomaterials, such as lignocellulosic biomass and products of its processing [ 58 , 59 , 60 ], wood-based materials [ 48 , 49 , 50 , 57 , 89 ], plants’ leaves and flowers [ 52 , 53 , 58 ], cotton [ 90 , 91 ], eggshells [ 55 ], materials of animal origin [ 92 , 93 ], microorganisms [ 54 , 94 , 95 ] and so on can be used as biotemplates.…”

Section: Bio-templated Ceo 2 -Based Catalystsmentioning

confidence: 99%

Template Synthesis of Porous Ceria-Based Catalysts for Environmental Application

et al. 2020

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Porous oxide materials are widely used in environmental catalysis owing to their outstanding properties such as high specific surface area, enhanced mass transport and diffusion, and accessibility of active sites. Oxides of metals with variable oxidation state such as ceria and double oxides based on ceria also provide high oxygen storage capacity which is important in a huge number of oxidation processes. The outstanding progress in the development of hierarchically organized porous oxide catalysts relates to the use of template synthetic methods. Single and mixed oxides with enhanced porous structure can serve both as supports for the catalysts of different nature and active components for catalytic oxidation of volatile organic compounds, soot particles and other environmentally dangerous components of exhaust gases, in hydrocarbons reforming, water gas shift reaction and photocatalytic transformations. This review highlights the recent progress in synthetic strategies using different types of templates (artificial and biological, hard and soft), including combined ones, in the preparation of single and mixed oxide catalysts based on ceria, and provides examples of their application in the main areas of environmental catalysis.

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Section: Bio-templated Ceo 2 -Based Catalystsmentioning

confidence: 99%

Template Synthesis of Porous Ceria-Based Catalysts for Environmental Application

et al. 2020

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“…Core-shell structures of CeO2/TiO2 nanorods exhibited enhanced response and selectivity to ethanol vapor [26]. Gas sensor based on CeO2-ZnO showed improved gas response and selectivity to ethanol than pure CeO2 sensor [27]. It is well documented that the addition of silica in metal oxides can stabilize the nanocrystal and enhance their catalytic activity [28,29].…”

Section: Introductionmentioning

confidence: 99%

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Wang

Zhang

et al. 2018

Sensors and Actuators B: Chemical

155

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Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Accepted Manuscript Highlights The silica modified CeO2 nanostructures are synthesized using a sol-hydrothermal route and used as NH3 gas-sensing materials. At room temperature, the 8%silica-CeO2 based gas sensor shows high gas response of 3244% to 80 ppm of NH3 and lower detection limit (0.5 ppm) towards NH3 gas. The gas response of the NH3 sensor has good linear characteristics for NH3 gas detecting. The NH3 sensor exhibits good reproducibility, selectivity and long-term stability to NH3 gas. AbstractThe silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m 2 /g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement 2 NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4 + and OH -on the surface.

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“…Then, the electrons would penetrate through the barrier easily and bring about a sharp drop in resistance. As a result, surface chemical processes are converted into electrical signals and a high response is eventually obtained [1,23]. …”

Section: Resultsmentioning

confidence: 99%

“…In recent years, sensors based on semiconductors with a one-dimensional (1D) nanostructure (in the forms of fibers, wires, sheets, rods, tubes, etc.) have been rapidly developed [1,2,3,4,5]. Compared to their micro-sized or bulk materials, 1D nanomaterials have been demonstrated with large surface specific areas, fast electron transport, and straight conduction pathways, which make them highly sensitive and efficient in detecting the target gas [6].…”

Section: Introductionmentioning

confidence: 99%

“…As an important functional material, CeO 2 has been used in barrier layers, capacitor devices, and as a catalyst support [2]. Also, CeO 2 is widely adopted to enhance the sensing properties of ZnO [1], TiO 2 [13], as well as In 2 O 3 [5]. Therefore, sensors based on CeO 2 -decorated CdS NWs might possess more possibility in the realization of an increased sensitivity and response speed.…”

Section: Introductionmentioning

confidence: 99%

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CeO2 Enhanced Ethanol Sensing Performance in a CdS Gas Sensor

Ren

et al. 2017

Sensors

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CdS nanowires (NWs) were fabricated through a facile low-temperature solvothermal method, following which CeO2 nanoparticles were modified on the NWs. The ethanol sensing characteristics of pure CdS and decorated ones with different CeO2 content were studied. It was found that the sensing performance of CdS was significantly improved after CeO2 decoration. In particular, the 5 at% CeO2/CdS composite exhibited a much higher response to 100 ppm ethanol (about 52), which was 2.6 times larger than that of pure CdS. A fast response and recovery time (less than 12 s and 3 s, respectively) were obtained as well as an excellent selectivity. These results make the CeO2-decorated CdS NWs good candidates for ethanol sensing applications.

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Synthesis and gas sensing application of porous CeO 2 –ZnO hollow fibers using cotton as biotemplates

Cited by 31 publications

References 22 publications

Template Synthesis of Porous Ceria-Based Catalysts for Environmental Application

Template Synthesis of Porous Ceria-Based Catalysts for Environmental Application

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

CeO2 Enhanced Ethanol Sensing Performance in a CdS Gas Sensor

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