Enhanced Gas Sensing Properties of Bi2O3-Core/In2O3-Shell Nanorod Gas Sensors

被引：17

作者：

Park, Sunghoon ^{[1
]}

An, Soyeon ^{[1
]}

Ko, Hyunsung ^{[1
]}

Jin, Changhyun ^{[1
]}

Lee, Chongmu ^{[1
]}

机构：

[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea

来源：

BULLETIN OF THE KOREAN CHEMICAL SOCIETY | 2012年 / 33卷 / 10期

关键词：

Bi2O3; In2O3; Nanorods; Sensor; NO2; CONDUCTION MODEL; BISMUTH OXIDE; THIN-FILMS; BI2O3; NANOSTRUCTURES; NANOWIRES; DEPOSITION; GROWTH;

D O I：

10.5012/bkcs.2012.33.10.3368

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Bi2O3 nanowires are highly sensitive to low concentrations of NO2 in ambient air and are almost insensitive to most other common gases. However, it still remains a challenge to enhance their sensing performance and detection limit. This study examined the influence of the encapsulation of beta-Bi2O3 nanorods with In2O3 on the NO2 gas sensing properties. beta-Bi2O3-core/In2O3-shell nanorods were fabricated by a two-step process comprising the thermal evaporation of Bi2O3 powders and sputter-deposition of In2O3. Multiple networked beta-Bi2O3-core/In2O3-shell nanorod sensors showed the responses of 12-156% at 1-5 ppm NO2 at 300 degrees C. These response values were 1.3-2.7 times larger than those of bare beta-Bi2O3 nanorod sensors at 1-5 ppm NO2. The enhancement in the response of beta-Bi2O3 nanorods to NO2 gas by the encapsulation by In2O3 can be accounted for based on the space-charge model.

引用

页码：3368 / 3372

页数：5

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