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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：集成电路学院副院长
性别：男
毕业院校：英国利兹大学
学位：博士
所在单位：集成电路学院
学科：微电子学与固体电子学
联系方式：Email：lixg@dlut.edu.cn
电子邮箱：lixg@dlut.edu.cn
Highly sensitive and selective room-temperature formaldehyde sensors using hollow TiO2 microspheres
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论文类型：期刊论文
发表时间：2015-11-01
发表刊物：SENSORS AND ACTUATORS B-CHEMICAL
收录刊物：SCIE、EI、Scopus
卷号：219
页面范围：158-163
ISSN号：0925-4005
关键字：Hollow TiO(2)microspheres; Room-temperature chemoresistive gas sensors; Formaldehyde; UV illumination
摘要：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.