Highly sensitive and ultra-fast gas sensor based on CeO2-loaded In2O3 hollow spheres for ppb-level hydrogen detection

被引：173

作者：

Hu, Jie ^{[1
,2
]}

Sun, Yongjiao ^{[1
,2
]}

Xue, Yan ^{[1
,2
]}

Zhang, Meng ^{[1
,2
]}

Li, Pengwei ^{[1
,2
]}

Lian, Kun ^{[1
,2
]}

Zhuiykov, Serge ^{[3
]}

Zhang, Wendong ^{[1
,2
]}

Chen, Yong ^{[4
]}

机构：

[1] Taiyuan Univ Technol, Micro & Nano Syst Res Ctr, Key Lab Adv Transducers & Intelligent Control Sys, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol, Coll Informat Engn, Taiyuan 030024, Shanxi, Peoples R China

[3] Univ Ghent, Dept Appl Analyt & Phys Chem, Fac Biosci Engn, Global Campus,119 Songdomunhwa Ro, Incheon 21985, South Korea

[4] UPMC Univ Paris 06, CNRS UMR PASTEUR 8640, Sorbonne Univ, Dept Chim,PSL Res Univ,Ecole Normale Super, 24 Rue Lhomond, F-75005 Paris, France

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 257卷

基金：

中国国家自然科学基金;

关键词：

Hydrothermal method; CeO2-loaded In2O3; Hollow spheres; Heterojunction; H-2 gas sensor; SENSING PROPERTIES; COMPOSITE NANOFIBERS; SNO2; NANOFIBERS; NANOPARTICLES; MECHANISM; NANORODS; MICROSPHERES; DIAGNOSIS; NANOCUBES; ROUTE;

D O I：

10.1016/j.snb.2017.10.139

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

H-2 detection sensors based on pure and different contents of CeO2 (0.5 at%, 1 at%, 2 at%, 4 at%, 6 at%) loaded In2O3 hollow spheres were successfully fabricated. The crystal phase, morphology and chemical composition of the obtained CeO2-loaded In2O3 samples were analyzed by characteristic techniques. The gas sensing results showed that the CeO2-loaded In2O3 gas sensors exhibit enhanced H-2 sensing performances compared with pure In2O3 at optimum working temperature (160 degrees C). Especially, the gas sensor based on 2 at% CeO2-loaded In2O3 hollow spheres showed most improved properties: highly response (20.7-50 ppm) at 160 degrees C, which was about 3 times higher than that of pure In2O3 sensor (6.9); excellent response and recovery time of 1 s and 9 s; ultra-low detection of limit of 10 ppb; good repeatability and long-term stability. Finally, the enhanced gas sensing mechanism of CeO2-loaded In2O3 gas sensor towards H-2 was also discussed. (c) 2017 Elsevier B.V. All rights reserved.

引用

页码：124 / 135

页数：12

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