Enhanced gas-sensing performance of ZnO@In2O3 core@shell nanofibers prepared by coaxial electrospinning

Huang, Baoyu1,2; Zhang, Zhenxing1,2; Zhao, Changhui3; Cairang, Limao4; Bai, Jinglong1,2; Zhang, Yaxiong1,2; Mu, Xuemei1,2; Du, Jingwei1,2; Wang, Huan1,2; Pan, Xiaojun1,2; Zhou, Jinyuan1,2; Xie, Erqing1,2

2018-02

10.1016/j.snb.2017.09.022

SENSORS AND ACTUATORS B-CHEMICAL   影响因子和分区

0925-4005

One-dimensional ZnO@In2O3 core@shell nanofibers (CSNFs) were synthesized via a facile coaxial electrospinning method followed by high-temperature pyrolysis treatment. The obtained nanofibers have a well-defined core@shell structure with ZnO as the core and In2O3 as the shell. Compared with the pure ZnO nanofibers and pure In2O3 nanofibers, the ZnO@In2O3 CSNFs based sensor presents the highest response to ethanol (31.87 at 100 ppm) at an operating temperature of 225 degrees C, which can be ascribed to the formation of a completely electron depletion layer in In2O3 shell. Moreover, the ZnO@ In2O3 CSNFs based sensor also demonstrates outstanding selectivity, excellent stability and low detection limitation(similar to 5 ppm) to ethanol vapor. The ultraviolet photoelectron spectroscopy confirms a type-II heterojunction formed at the interface of ZnO core and In2O3 shell. The main mechanism for the enhanced performance of ZnO@In2O3 CSNFs gas sensor is the depletion modulating of In2O3 shell layer in electron transfer. These results are valuable for the practical application of ZnO@ In2O3 CSNFs in ethanol detection. (C) 2017 Elsevier B.V. All rights reserved.

Zinc oxide Indium oxide Electrospinning Core@shell nanofibers Gas sensors

SCI ; EI

英语

其他

Fundamental Research Funds for the Central Universities[lzujbky-860268]

Chemistry ; Electrochemistry ; Instruments & Instrumentation

Chemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation

WOS:000414319900130

ELSEVIER SCIENCE SA

20173704162678

Chemical sensors ; Electrospinning ; Ethanol ; Gas detectors ; Gas sensing electrodes ; Heterojunctions ; II-VI semiconductors ; Nanofibers ; Shells (structures) ; Ultraviolet photoelectron spectroscopy ; Zinc oxide

Structural Members and Shapes:408.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Chemistry:801 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Fiber Chemistry and Processing:819.3 ; Accidents and Accident Prevention:914.1 ; Solid State Physics:933

CHEMISTRY

Web of Science

1.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
2.Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Gansu, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Northwest Univ Nationalities, Key Lab Elect Mat State Ethn Affairs Commiss, Coll Elect Engn, Lanzhou 730030, Gansu, Peoples R China

Huang, Baoyu,Zhang, Zhenxing,Zhao, Changhui,et al. Enhanced gas-sensing performance of ZnO@In2O3 core@shell nanofibers prepared by coaxial electrospinning[J]. SENSORS AND ACTUATORS B-CHEMICAL,2018,255:2248-2257.

Huang, Baoyu.,Zhang, Zhenxing.,Zhao, Changhui.,Cairang, Limao.,Bai, Jinglong.,...&Xie, Erqing.(2018).Enhanced gas-sensing performance of ZnO@In2O3 core@shell nanofibers prepared by coaxial electrospinning.SENSORS AND ACTUATORS B-CHEMICAL,255,2248-2257.

Huang, Baoyu,et al."Enhanced gas-sensing performance of ZnO@In2O3 core@shell nanofibers prepared by coaxial electrospinning".SENSORS AND ACTUATORS B-CHEMICAL 255(2018):2248-2257.