Indexed by:
Journal Papers
First Author:
Li, Xiaogan
Correspondence Author:
Li, XG (reprint author), Dalian Univ Technol, Inst Sensing Technol, Sch Elect Sci & Technol, Dalian, Peoples R China.
Co-author:
Li, Xiaoxin,Wang, Jing,Lin, Shiwei
Date of Publication:
2015-11-01
Journal:
SENSORS AND ACTUATORS B-CHEMICAL
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
219
Page Number:
158-163
ISSN No.:
0925-4005
Key Words:
Hollow TiO(2)microspheres; Room-temperature chemoresistive gas sensors;
Formaldehyde; UV illumination
Abstract:
Room temperature chemoresistive gas sensors could significantly decrease the demand of power consumption and are thus highly desirable in self-sustained nanosensors. Here we report that chemoresistive sensors fabricated from mesoporous hollow TiO2 microspheres show high sensitivity and selectivity to sub-ppm level of formaldehyde at room temperature with the assistance of low powered UV LED photon energy (2.5 mW). The sensor indicated excellent selectivity to other possible interferrents such as methanol, ethanol, acetone, ammonia and methylbenzene at low concentrations. These sensors have a much faster response (similar to 40 s)/recovery (similar to 50 s) characteristic, which significantly surpass the sensing properties shown by other types of nanostructured TiO2 reported in literature. (C) 2015 Elsevier B.V. All rights reserved.
Translation or Not:
no
