Nd1-xCaxFeO3 (x = 0, 0.3) hollow core-shell microspheres for ethanol gas sensing

Wang, You and Wang, Yun and Chen, Jun and Deng, Jinxia and Yu, Ranbo and Xing, Xianran (2015) Nd1-xCaxFeO3 (x = 0, 0.3) hollow core-shell microspheres for ethanol gas sensing. European Journal of Inorganic Chemistry, 2015 (35). pp. 5767-5772. ISSN 1434-1948

Abstract

The use of mesoporous and hollow structures is a promising strategy to enhance gas-sensing properties. The framework of perovskite oxides has the ability to accommodate different cations, which endows it with rich oxygen deficiencies for preferable gas adsorption. Herein, we outline the fabrication of perovskite Nd1-xCaxFeO3 (x = 0, 0.3) hollow core-shell microspheres by using carbonaceous microspheres as templates. The gas-sensing properties of Nd0.7Ca0.3FeO3 core-shell microspheres were systematically investigated. The response to 500 ppm ethanol was 17 at 140 °C, which is much higher than the response of Nd0.7Ca0.3FeO3 nanoparticles. Also, rapid response and recovery characteristics were achieved. Furthermore, after 50 cyclic tests and 10 testing days, the gas response of the Nd0.7Ca0.3FeO3 hollow core-shell microspheres to 500 ppm ethanol at 140 °C was nearly constant. The long-term stability, good sensitivity, and rapid response and recovery times demonstrate the potential application of these hollow core-shell microspheres as a sensing material. Nd1-xCaxFeO3 (x = 0, 0.3) hollow core-shell microspheres are prepared by a template method, and the sensing properties of Nd0.7Ca0.3FeO3 for ethanol gas detection are studied. The long-term stability, good sensitivity, and rapid response and recovery times demonstrate the potential application of these core-shell microspheres as a sensing material.


Statistics for USQ ePrint 31936
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 15 Jun 2017 04:41
Last Modified: 15 Jun 2017 04:41
Uncontrolled Keywords: Core-shell structures; Hollow microspheres; Perovskite phases; Rare earths; Sensors;
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030299 Inorganic Chemistry not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1002/ejic.201500869
URI: http://eprints.usq.edu.au/id/eprint/31936

Actions (login required)

View Item Archive Repository Staff Only