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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
Reduced graphene oxide (rGO) encapsulated Co3O4 composite nanofibers for highly selective ammonia sensors
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论文类型：期刊论文
发表时间：2016-01-01
发表刊物：SENSORS AND ACTUATORS B-CHEMICAL
收录刊物：SCIE、EI、ESI高被引论文
卷号：222
页面范围：864-870
ISSN号：0925-4005
关键字：Reduced graphene oxide (rGO); rGO encapsulated Co3O4 composite nanofibers; Electrospinning; Room-temperature gas sensors; Ammonia
摘要：The reduced graphene oxide (rGO) encapsulated Co3O4 nanocrystals were fabricated by using the electrospinning technology. The sample shows nanofiber morphology and the Co3O4 nanocrystals were wrapped by rGO thin layers. The as-electrospun rGO-Co3O4 nanofibers based chemoresistive sensor exhibited a p-type semiconductor behavior in ambient conditions and showed an excellent sensitivity with a fast response and recovery to different concentrations of ammonia from 5 to 100 ppm at room temperature. The sensor displays selectivity to several potential interferrents such as methanol, ethanol, formaldehyde, acetone, benzene, and methylbenzene. It may be attributed to the unique hierarchical wrapping microstructure and the selective NH3 adsorption at both the wrapping layer of rGO and the polarized C-Co3+ covalent centers within the nanofibers. (C) 2015 Elsevier B.V. All rights reserved.