Multi-shelled copper oxide hollow spheres and their gas sensing properties

Xu, Jie and Yao, Xiang and Wei, Wangya and Wang, Zumin and Yu, Ranbo (2017) Multi-shelled copper oxide hollow spheres and their gas sensing properties. Materials Research Bulletin, 87. pp. 214-218. ISSN 0025-5408

Abstract

In this work, multi-shelled copper oxide hollow composite microspheres with tunable shell number and composition were successfully synthesized by means of hard template method. The source for the carbonaceous microspheres templates affects the compositions of the final copper oxides spheres critically. When changing the sucrose to glucose, the composite hollow spheres of cupric oxide (CuO) and cuprous oxide (Cu2O) were synthesized instead of the pure CuO hollow spheres. The structure of products can be tuned from single-, double- to triple-shelled hollow spheres by precisely increasing the calcination rate. The pure CuO hollow-shell spheres had uniform diameters of about 900 nm and an average shell thickness of 45 nm. While the diameters and thicknesses of Cu2O/CuO composite hollow-shell spheres are 90–500 nm and 15–35 nm, respectively. Both of these two kinds of hollow-shell spheres showed much improved response to ethanol gas as gas sensors, the triple-shelled CuO/Cu2O hollow spheres exhibited the highest response at 140 °C, 1000 ppm.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 06 Jul 2017 03:55
Last Modified: 28 Jul 2017 01:32
Uncontrolled Keywords: A. Inorganic compounds; A. Nanostructures; A. Oxides; B. Chemical synthesis; C. Transmission electron microscopy; calcination rate; composite microspheres; cuprous oxide; gas sensing properties; hard templates; hollow shells; shell thickness; uniform diameter; structural members and shapes; copper; optical devices and systems; inorganic compounds; accidents and accident prevention
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1016/j.materresbull.2016.12.004
URI: http://eprints.usq.edu.au/id/eprint/31928

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