In2O3-decorated ordered mesoporous NiO for enhanced NO2 sensing at room temperature

被引:30
|
作者
Dong, Zhibo [1 ]
Liu, Shantang [1 ]
机构
[1] Wuhan Inst Technol, Sch Chem & Environm Engn, Key Lab Green Chem Proc, Minist Educ, Wuhan 430073, Hubei, Peoples R China
基金
湖北省教育厅重点项目; 中国国家自然科学基金;
关键词
FLOWER-LIKE NIO; ELECTROCHEMICAL SENSOR; CARBON NANOTUBES; GRAPHENE OXIDE; GAS SENSORS; PERFORMANCE; IN2O3; MICROSPHERES; NANORODS; NANOCOMPOSITE;
D O I
10.1007/s10854-017-8190-x
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this work, ordered mesoporous structures of In2O3-decorated NiO were prepared by a two-step process, comprising of the synthesis of ordered mesoporous NiO followed by injection of In3+ into their pores. The pore size distribution of the as prepared samples was between 4.1 and 21.1 nm. Furthermore, their sensing performances toward NO2 were tested systematically. The results showed the highest response about 3 towards 15 ppm NO2 sensing at room temperature for 5.0 at.% In2O3-decorated NiO compared to other decorated and pure samples. Moreover, the sensor displayed excellent selectivity towards NO2 in the presence of other interfering gases, such as carbon monoxide, ammonia, ethanol, methanol, formaldehyde, toluene, acetone. The exceptional NO2 sensing performance of the In2O3-decorated mesoporous NiO may be attributed to their high specific surface area and the formation of p-n junction with modified carrier concentration caused by In3+ doping. This method can act as an effective strategy for enhancement of gas-sensing properties of pure metal oxides.
引用
收藏
页码:2645 / 2653
页数:9
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