145 0

Hydrogen sensing properties of multiple networked Nb2O5/ZnO core-shell nanorod sensors

Title
Hydrogen sensing properties of multiple networked Nb2O5/ZnO core-shell nanorod sensors
Other Titles
ZnO core-shell nanorod sensors
Author
김현우
Keywords
Nb2O5 nanorods; Core-shell structures; Gas sensors; Hydrogen
Issue Date
2014-10
Publisher
Elsevier Science
Citation
Sensors & Actuators B. Chemical, 2014, 202, P.840-845
Abstract
Nb2O5 nanosensors with good sensing properties toward hydrogen and oxygen gases at high temperatures have been reported, but sensing performances of Nb2O5-based gas sensors are still unsatisfactory. This study examined the sensing properties of Nb2O5-core/ZnO-shell nanorod sensors toward H-2 gas. The responses of pristine Nb2O5 and Nb2O5-core/ZnO-shell nanorods to 10,000 ppm H-2 at 300 degrees C were similar to 250% and similar to 586%, respectively. The response and recovery times of Nb2O5-core/ZnO-shell nanorods at 10,000 ppm H-2 at 300 degrees C were 17 and 23s, respectively, whereas those of pristine Nb2O5 nanorods were 23 and 32s. The response of the core-shell nanowire sensor to H-2 gas showed strong dependence on the shell layer thickness. The strongest response was obtained with a ZnO shell layer thickness of 46nm, which is equal to the maximum depletion layer width in the shell. The origin of the enhanced sensing properties of Nb2O5-core/ZnO-shell nanorods toward H-2 is also discussed. (C) 2014 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0925400514007175?via%3Dihub
ISSN
0925-4005
DOI
10.1016/j.snb.2014.06.028
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE