Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19565
Title: Highly responsive room-temperature hydrogen sensing of α-MoO3 nanoribbon membranes
Authors: Yang, S
Wang, Z
Hu, Y
Luo, X
Lei, J
Zhou, D
Fei, L
Wang, Y 
Gu, H
Keywords: Hydrogen sensor
Hydrothermal method
Interdigital electrode
MoO3
Nanoribbons
Issue Date: 2015
Publisher: American Chemical Society
Source: ACS applied materials and interfaces, 2015, v. 7, no. 17, p. 9247-9253 How to cite?
Journal: ACS Applied Materials and Interfaces 
Abstract: [001]-Oriented α-MoO3 nanoribbons were synthesized via hydrothermal method at temperature from 120 to 200 °C and following assembled a membrane on interdigital electrodes to form sensors. The sensitivity, response speed, and recovery speed of the sensor improve with the increasing hydrothermal temperature. Among them, the sample obtained at 200 °C exhibits a room-temperature response time of 14.1 s toward 1000 ppm of H<inf>2</inf>. The nanoribbons also show good selectivity against CO, ethanol, and acetone, as well as high sensitivity to H<inf>2</inf> with a concentration as low as 500 ppb. The hydrogen sensing behavior is dependent on the redox reaction between the H2 and chemisorbed oxygen species. Higher hydrothermal temperature creates larger specific surface area and higher Mo5+ content, leading to increased chemisorbed oxygen species on the nanoribbon surface.
URI: http://hdl.handle.net/10397/19565
ISSN: 1944-8244
DOI: 10.1021/acsami.5b01858
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